Pre-Application Review Meeting BOP Design of APR1400 · Meeting Design consideration for important DC review items t ion Revie P re-applica 2 8th . BOP Design Introduction Overview

BOP Design

Pre-Application Review MeetingPre Application Review MeetingBOP Design of APR1400

1. Ultimate Heat Sink and Essential Service Water System

2. Component Cooling Water System

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3. Essential Chilled Water System

4 Safety Related HVAC System

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4. Safety Related HVAC System

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BOP Design


1.Ultimate Heat Sink and

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Essential Service Water System

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BOP Design

Ultimate Heat Sink and Ultimate Heat Sink and Essential Service Water System

Introduction

System function

System configuration

System operation

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BOP Design

Introduction

Overview

NRC regulatory requirements g y q

Industry codes and standards

System classification

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BOP Design

Overview

Conceptual design of Ultimate Heat Sink (UHS) is based on safety-related cooling tower for APR1400 (reference plant uses sea water as UHS).cooling tower for APR1400 (reference plant uses sea water as UHS).

Design temperature of safety-related cooling tower is based on 0% exceedance value of ambient design temperature in accordance with EPRI-URD (maximum : 81°F WB).

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BOP Design

NRC regulatory requirements

10 CFR 50, Appendix A,

GDC 2 : Design Bases for Protection Against Natural Phenomena GDC 2 : Design Bases for Protection Against Natural Phenomena

GDC 4 : Environmental and Dynamic Effects Design Bases

GDC 44 : Cooling Water GDC 44 : Cooling Water

GDC 46 : Testing of Cooling Water System

RG 1.27 (Rev.2), Ultimate Heat Sink for Nuclear Power Plants

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G ( e ), U t ate eat S o uc ea o e a ts

RG 1.29 (Rev.4), Seismic Design Classification

Standard Review Plan 9.2.1 (Rev.4)

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Standard Review Plan 9.2.5 (Rev.3)

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ANSI/ANS 51.1-1993

ASME C d ASME Codes

HI Standards

CTI Standards

NUREG-0927, Evaluation of Water Hammer Occurrences in NPPs

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Item SafetyCl

ElectricalCl

Seismic C tClass Class Category

ESW pump 3 1E I

UHS cooling tower 3 1E I

UHS makeup pump 3 1E I

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Pipe 3 - I

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ESW filter 3 Non-1E I

Others NNS Non 1E II

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BOP Design

System Function

Safety function

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BOP Design

Safety function

Essential Service Water System (ESWS) transfers heat from Component Cooling Water System (CCWS) to UHS cooling tower during all operationCooling Water System (CCWS) to UHS cooling tower during all operation modes.

UHS cooling tower dissipates heat transferred from ESWS to air UHS cooling tower dissipates heat transferred from ESWS to air.

UHS supplies cooling water for at least 30 days for safe shutdown without

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makeup water under the worst combination of adverse environmental conditions.

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BOP Design

System Configuration

Schematic diagram

Component descriptionp p

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BOP Design

ESWS Schematic diagram

CCW HXCCW

CCW HXBuilding

ESW PumpHouse

CCW Water

ESW Filter

UHSCoolingTower

UHSCoolingTowerBasin

Filter

RM

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CCW Water

ESW Pump

CCW HX

UHS

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ESW Filter

UHSCoolingTower

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RM

UHSCoolingTowerBasin

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ESW Pump * RM : Radiation Monitor

BOP Design

ESWS Component description

ESW pump Four ESW pumps (two per division) Four ESW pumps (two per division)

Each pump provides 100% of required flow during post-LOCA.

Only one pump per division is operated during normal operation Only one pump per division is operated during normal operation.Standby pump in the same division automatically starts on a low pump discharge pressure or flowrate signal.

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BOP Design

ESWS Component description

ESW filter Six ESW filters (three per division) Six ESW filters (three per division)

Automatic backwash type* The differential pressure across the operating ESW filter is monitored The differential pressure across the operating ESW filter is monitored.

At the set-point, backwash operation is started using the operating ESW pump.

Only two filters are required during post-LOCA.

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BOP Design

UHS Schematic diagram (Conceptual design)

Ultimate Heat Sink (UHS) CCW HXCCW HX

Site-Specific

Ultimate Heat Sink (UHS) Makeup Water Source ReturnReturn

Cooling Tower

Fan

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Cooling Tower

Fan

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UHS MakeupPump

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Pump

Normal Makeup

UHS Cooling Tower

UHS Cooling Tower

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UHS UHS ESW

ChemicalAddition Unit

Blowdown

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Cooling TowerBasin

UHSCooling TowerBasin

ESWPump

Suction

ESWPump

Suction

Screen Screen

Blowdown

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BOP Design

UHS Component description (Conceptual design)

UHS cooling tower and basin Two mechanical draft cooling towers (one per division) Two mechanical draft cooling towers (one per division)

Each cooling tower consists of two cell with fans, motors, and associated components.associated components.

Each cooling tower cell provides 100% of required capacity duringpost-LOCA.

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72 hours under DBA assuming loss of makeup water capability.

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Design wet bulb temperature is based on EPRI-URD (81oF).

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BOP Design

UHS Component description (Conceptual design)

UHS makeup pump Four UHS makeup pumps (two per division) Four UHS makeup pumps (two per division)

Each pump provides 100% of the required flow for DBA.

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BOP Design

System Operation

Normal operation

Startup, shutdown, and refueling operationp g p

Abnormal and accident operation

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BOP Design

Normal operation

One ESW pump, two ESW filters, two CCW heat exchangers, and one UHS cooling tower cell in each division are operatedone UHS cooling tower cell in each division are operated.

Cooling Tower

CCW HX

Tower Fan

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CCW HXCCW Water

UHS Cooling T

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ESW Filt

Tower

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ESW Pump

FilterRM

UHSCooling Tower * RM : Radiation Monitor

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Screen

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BOP Design

Startup, shutdown, and refueling operation

Two ESW pumps, three ESW filters, three CCW heat exchangers, and one UHS cooling tower cell in each division are operatedand one UHS cooling tower cell in each division are operated.

Cooling Tower

CCW HX

Tower Fan

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CCW HXCCW Water

UHS Cooling T

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ESW Filt

Tower

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ESW Pump

FilterRM


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Screen

BOP Design


Basically same as normal operation

Cooling Tower

CCW HX

Tower Fan

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CCW HXCCW Water

UHS Cooling

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ESW Filt

Tower

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ESW Pump

FilterRM


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Screen

BOP Design

Design Consideration for Design Consideration for Important DC Review Items

Bio fouling

Clogginggg g

Water hammer

System/Component margin

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Instrumentation and control

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ITAAC

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BOP Design

Bio fouling

Chemicals from chemical injection system will be provided. Detailed chemicals depending on site water quality will be provided by Detailed chemicals depending on site water quality will be provided by

COL applicant.

Biocide, algaecide, pH adjuster, corrosion inhibitor, scale inhibitor and Biocide, algaecide, pH adjuster, corrosion inhibitor, scale inhibitor and silt dispersant will be included.

Blowdown system will be designed by COL applicant.

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BOP Design

Clogging

UHS basin screen and ESW filters are provided to prevent clogging.

Cooling Tower

Fan

CCW HXCCW

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Water

UHS Cooling Tower

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ESW Filter

RM

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ESW Pump

UHSCooling TowerBasin

* RM : Radiation Monitor

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BOP Design

Water hammer

ESWS is designed to minimize the potential of water hammer by

f ll i th id i NUREG 0927following the guidance in NUREG-0927. Vents in all high points / Drains in all low points

Selection of al e opening/closing time Selection of valve opening/closing time

ESW pipe layout

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BOP Design


APR1400 approach Based on the industry practice and engineering judgement Based on the industry practice and engineering judgement

Additional margin will be added during equipment procurement by vendorsvendors

Maintenance and replacement of components will restore margin lost due to degradation.

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Failure Modes and Effects Analysis (FMEA)

Basic criteria Ensure that redundancy of system function exists in case of single Ensure that redundancy of system function exists in case of single

active failure

Scope of equipment (all active components) Scope of equipment (all active components) ESW pumps

ESW filters

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ESW filters

UHS cooling tower fan motors

UHS makeup pumps

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All active valves

The FMEA for these active components will be addressed in DCD

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BOP Design

Instrumentation and controls

Major instruments ESW pump discharge flow & pressure ESW pump discharge flow & pressure

ESW filter differential pressure

Radiation monitor Radiation monitor

UHS cooling tower basin temperature & water level

UHS makeup pump discharge flow & pressure

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UHS makeup pump discharge flow & pressure

Identified in the simplified P&ID.

For each of the above instruments following discussion will be

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MCR/RSR alarm

Control function

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BOP Design

ITAAC

ITAAC for all safety-related components will be developed based on SRP 14 3SRP 14.3.

Inspectability and testability of each ITAAC item will be reviewed based on the inspection/test procedures of SKN 3&4.

Availability of detailed design documents and drawings needed for

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Availability of detailed design documents and drawings needed for inspection, test, and analysis will be reviewed based on experience with SKN 3&4.

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BOP Design


2.Component Cooling Water System

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Component Cooling Water System

Introduction

System function


System operation

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BOP Design

Introduction

Overview

NRC regulatory requirementsg y q



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Overview

Component Cooling Water System (CCWS)Closed loop cooling water system that in conjunction withClosed loop cooling water system that, in conjunction with Essential Service Water System (ESWS) and Ultimate Heat Sink (UHS), removes heat generated from plant's safety-related and(UHS), removes heat generated from plant s safety related and non-safety-related components connected to CCWS.

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10 CFR 50, Appendix A GDC 2 : Design bases for protection against natural phenomena GDC 2 : Design bases for protection against natural phenomena

GDC 4 : Environmental and dynamic effects design bases

GDC 44 : Cooling water GDC 44 : Cooling water

GDC 45 : Inspection of cooling water system

GDC 46 : Testing of cooling water system

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GDC 46 : Testing of cooling water system

RG 1.29 (rev.4) : Seismic Design Classification

Standard Review Plan 9 2 2 (rev 4)

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ANSI/ANS 51.1-1983

ASME C d ASME Codes

HI Standards

HEI Standards

NUREG-0927, Evaluation of Water Hammer Occurrences in NPPs

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BOP Design


Item SafetyClass

ElectricalClass

SeismicCategoryClass Class Category

Containment isolation 2 1E I

CCW 3 1E ICCW pump 3 1E I

CCW makeup pump 3 1E I

S f l d i d l 3 1E I

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Safety-related pipe and valves 3 1E I

CCW heat exchanger 3 - I

CCW k 3 I

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Non-safety-related pipe and valveslocated in safety related area NNS Non-1E II

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Others NNS Non-1E III

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BOP Design

System Function

Safety function

Non-safety function

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BOP Design

Safety function

Remove heat from safety-related components required for plant emergency shutdown and mitigation of design basis accidentsemergency shutdown and mitigation of design basis accidents.

Provide an intermediate barrier between radioactive or potentially radioactive systems and ESWS to reduce possibility of radioactivity leakage to environment.

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BOP Design

Safety function

Safety-related loads : division I (division II)

Train A (Train B) Train C (Train D)

• Shutdown cooling heat exchanger (SC HX)

• Containment spray heat exchanger(CS HX)

• Shutdown cooling mini-flow heat exchanger (SC MFHX)

Essential chiller condenser

• Containment spray mini-flow heat exchanger (CS MFHX)

Essential chiller condenser

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• Essential chiller condenser

• Emergency diesel generator cooler(EDG cooler)

• Essential chiller condenser

• Emergency diesel generator cooler (EDG cooler)

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• Spent fuel pool cooling heat exchanger(SFPC HX)

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BOP Design

Non-safety function

Non-safety-related loads

Div. I Div. II

• RCP cooler

• Central chiller condensers

• Process radiation monitor

• Boric acid concentrator• Central chiller condensers

• Gas stripper package

• Process radiation monitor

• Boric acid concentrator

• Central chiller condenser

• Compound building chiller condenser

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Process radiation monitor

• Charging pump mini-flow heat exchanger

Compound building chiller condenser

• Normal primary sample cooler rack

• GRS chiller skid

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• LRS seal water heat exchanger

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• Condensate receiver tank vent condenser

• Secondary sample cooler rack chiller

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* GRS : Gaseous Radwaste System * LRS : Liquid Radwaste System

BOP Design


Schematic diagram

Component description

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BOP Design

Schematic diagram

ESW

S

CCW HX EDG-ASFPC HX

Essential Chiller ContainmentContainment

AFST

CCW MakeupP

MDS

R

N2

SurgeTank

CCW Pump

SC MFHXSC HX RCP Cooler

Letdown HX

Pump

Central ChillerGas Stripper

Charging Pump MFHX

CS HXCS MFHX

Essential ChillerEDG-C

Chemical Addition Tank

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ESW

S

CCW HX EDG-BSFPC HX

Essential Chiller

AFST

CCW MakeupP

MDS

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Central ChillerBoric Acid Concentrator

SurgeTank

CCW Pump

Essential ChillerSC MFHX

SC HX

Pump

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C/R Tank Vent CondenserSampling System

LRS Seal Water HXCompound Bldg Water Chiller

CS HXCS MFHX

Essential ChillerEDG-D


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: Radiation Monitor MDS : Makeup Demineralizer System AFST : Auxiliary Feedwater Storage TankR

BOP Design


CCW pump Four CCW pumps (two per division) Four CCW pumps (two per division)

Horizontal, centrifugal type

When actual cooling water flow is insufficient standby pump in the same When actual cooling water flow is insufficient, standby pump in the same division automatically starts on a low pump discharge pressure signal.

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CCW heat exchanger Six CCW heat exchanger (three per division)

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Hot side : CCW, Cold side : ESW

B l 95℉ d i l ti

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Below 110℉ during shutdown or DBA

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BOP Design

Component description (cont.)

CCW surge tank Two CCW surge tank (one per division) Two CCW surge tank (one per division)

Vertical type

Function Function− Provide adequate NPSH for CCW pumps.

− Provide a means of damping pressure transient developed in CCWS due to

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gload changes and pump on/off.

− Provide a means of monitoring fluid leakage into or from CCWS.

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− Provide surge volume to accommodate fluid losses from a piping failure in

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non-safety related piping and equipment in CCWS.

− Facilitate venting and filling of CCWS.

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BOP Design

Component description (cont.)

CCW makeup pump Two CCW makeup pumps (one per division) Two CCW makeup pumps (one per division)

Horizontal centrifugal type

Supply makeup water to CCW surge tank from auxiliary feedwater Supply makeup water to CCW surge tank from auxiliary feedwaterstorage tank.

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CCW chemical addition tank Two CCW chemical addition tanks (one per division)

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Radiation monitor

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Two radiation monitors (one per division)

Detect any in-leakage that contains radioactivity.

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BOP Design

System Operation

Normal operation

Startup, shutdown and refueling operationp g p


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BOP Design

Normal operation

One pump and two heat exchangers per division are operated.

C li t i li d t ll t t CS HX Cooling water is supplied to all components except CS HXs, EDG coolers, and SC HXs.

CCWS t t i i t i d b l 95℉ CCWS temperature is maintained below 95℉.

In the event of loss of one division, Th h di i i i li d l li h h

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The other division is aligned to supply cooling water through cross-connection lines to the safety-related and non-safety-related components to support power generation in both divisions.

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components to support power generation in both divisions.

Both pumps in the other division are used.

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* CS HX : containment spray heat exchanger

* SC HX h td li h t h

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BOP Design

Normal operation

ESW

S

CCW HX EDG-ASFPC HX


AFST

CCW MakeupP

MDS

R

N2

SurgeTank

CCW Pump


Letdown HX

Pump


Charging Pump MFHX

CS HXCS MFHX



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ESW

S

CCW HX EDG-BSFPC HX

Essential Chiller

AFST

CCW MakeupP

MDS

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N2

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SurgeTank

CCW Pump


SC HX

Pump

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CS HXCS MFHX



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BOP Design


Four pumps and six heat exchangers in both divisions are operated.

Startup operation Provide cooing water to all components except CS heat exchangers

and EDG coolers.

Shutdown operation

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Shutdown operation Provide cooing water to all components except CS heat exchangers

and EDG coolers.

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Refueling operation P id i t t ll t i l di b th SFP li

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heat exchangers, except CS heat exchangers, EDG coolers, and RCP coolers.

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BOP Design


ESW

S

CCW HX EDG-ASFPC HX


AFST

CCW MakeupP

MDS

R

N2

SurgeTank

CCW Pump


Letdown HX

Pump


Charging Pump MFHX

CS HXCS MFHX



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ESW

S

CCW HX EDG-BSFPC HX

Essential Chiller

AFST

CCW MakeupP

MDS

R

N2: Opened in Shutdown

: Opened/Closed in Refueling

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SurgeTank

CCW Pump


SC HX

Pump

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CS HXCS MFHX



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BOP Design


One pump and two heat exchangers in a single division are required to operate during post LOCAto operate during post-LOCA.

Active valve alignments

Signal Close Open

SIAS • Non-essential supply/return header• Cross connection supply/return header

• EDG supply header• CS HX supply header

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pp y• SC HX supply header• CCW HX bypass flow

pp y• CCW HX outlet

CIAS • Letdown HX supply/return header -

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CSAS • RCP cooler supply/return header • CS HX supply header

STLLLS • Non essential supply/return header

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• Cross connection supply/return header• RCP cooler supply/return header

-

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* SIAS : Safety Injection Actuation Signal * CIAS : Containment Isolation Actuation Signal* CSAS : Containment Spray Actuation Signal * STLLLS : Surge Tank Low-Low Level Signal

BOP Design


ESW

S

CCW HX EDG-ASFPC HX


AFST

CCW MakeupP

MDS

R

N2

SurgeTank

CCW Pump


Letdown HX

Pump


Charging Pump MFHX

CS HXCS MFHX



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ESW

S

CCW HX EDG-BSFPC HX

Essential Chiller

AFST

CCW MakeupP

MDS

R

N2

: Closed on CIAS

O d/Cl d CSAS

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SurgeTank

CCW Pump


SC HX

Pump : Opened/Closed on CSAS

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CS HXCS MFHX



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BOP Design


Water hammer

System/Component marginy p g

RCP seal cooling

Cross tie Isolation

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ITAAC

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52

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BOP Design

Water hammer

CCWS is designed to minimize the potential of water hammer by following the guidance in NUREG 0927following the guidance in NUREG-0927. Adequate filling by the elevated surge tank

Vents in all high points / Drains in all low points Vents in all high points / Drains in all low points

Selection of valve opening/closing times

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BOP Design


APR1400 approach Based on the industry practice and engineering judgement Based on the industry practice and engineering judgement

Additional margin during equipment procurement by vendors

Maintenance and replacement of components will restore margins lost Maintenance and replacement of components will restore margins lost due to degradation.

Adequate margin will be ensured considering the above.

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q g g

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54 APR1400-E-M-EC-120012-NP

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P

BOP Design

RCP seal cooling

Provide cooling water to RCP Cooler. Cooling water is automatically isolated on CSAS or surge tank low low Cooling water is automatically isolated on CSAS or surge tank low-low

level signal.

Automatic close signals can be overridden by manual operation in the Automatic close signals can be overridden by manual operation in the MCR.

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55 APR1400-E-M-EC-120012-NP

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P

BOP Design

Cross tie isolation

Normal power operation Double isolation valves are closed Double isolation valves are closed.

These valves are powered from two independent Class 1E power sources.sources.

In the event of loss of one division during power operation

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Double isolation valves are opened to supply cooling water to the other division.

T CCW d th CCW h t h f th th di i i

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In the event of emergency conditions Double isolation valves are automatically closed on SIAS or surge tank

56 APR1400-E-M-EC-120012-NP

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P low-low level signal.

BOP Design

Cross tie isolation

ESW

S

CCW HX EDG-ASFPC HX


AFST

CCW MakeupP

MDS

R

N2

SurgeTank

CCW Pump


Letdown HX

Pump


Charging Pump MFHX

CS HXCS MFHX



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ng

ESW

S

CCW HX EDG-BSFPC HX

Essential Chiller

AFST

CCW MakeupP

MDS

R

N2

tio

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SurgeTank

CCW Pump


SC HX

Pump

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CS HXCS MFHX



57 APR1400-E-M-EC-120012-NP

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P


BOP Design

Failure Modes and Effects Analysis (FMEA)

Basic criteria Ensure that redundancy of system function exists in case of single Ensure that redundancy of system function exists in case of single

active failure.

Scope of equipments (all active equipments) CCW pumps

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All active isolation valves

CCW makeup pumps

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The FMEA for these active components will be addressed in DCD.

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58 APR1400-E-M-EC-120012-NP

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BOP Design


Major instruments CCW pump common discharge header pressure CCW pump common discharge header pressure

CCW HX inlet/outlet header temperature

CCW pump discharge flow CCW pump discharge flow

CCW HX outlet flow

RCP cooler flow

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RCP cooler flow

CCW surge tank level

Identified in the simplified P&ID

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For each instruments, following discussion will be included in DCD; MCR/RSR indication

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MCR/RSR alarm

Control function

59 APR1400-E-M-EC-120012-NP

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P Control function(MCR : Main Control Room, RSR : Remote Shutdown Room)

BOP Design

ITAAC

ITAAC for all safety-related components will be developed based on SRP 14 3SRP 14.3.

Inspectability and testability of each ITAAC item will be reviewed based on the inspection/test procedures of SKN 3&4.


w M

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Availability of detailed design documents and drawings needed for inspection, test, and analysis will be reviewed based on experience with SKN 3&4.

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60 APR1400-E-M-EC-120012-NP

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BOP Design


3. Essential Chilled Water System

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BOP Design

Essential Chilled Water SystemIntroduction

System function


System operation

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BOP Design

Introduction

Overview




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P

BOP Design

Overview

Provide chilled water to the following safety related HVAC systems during Provide chilled water to the following safety-related HVAC systems during all plant operating conditions.

Control room HVAC systemy

Aux. bldg controlled area HVAC system

Electric and I&C equipment area HVAC system

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Two (2) independent divisions seismic category I

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Pre

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cat

64 APR1400-E-M-EC-120012-NP

8th

P

BOP Design


10 CFR 50 App. App

GDC 2 : Design Bases for Natural Phenomena

GDC 4 : Design Bases for Environmental and Dynamic Effectsg y

GDC 44 : Component Redundancy

GDC 45 : Design Provision for In-service Inspection

w M

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ng GDC 46 : Design Provision for Operational Functional Test

USNRC RG 1 29 Seismic Design Classification

tio

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w USNRC RG 1.29, Seismic Design Classification

SRP 9.2.2, Rev. 4 Reactor Auxiliary Cooling Water System

NUREG-0927 Rev 1 Evaluation of Water Hammer Occurrences in

Pre

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cat NUREG 0927, Rev.1 Evaluation of Water Hammer Occurrences in

Nuclear Power Plants

65 APR1400-E-M-EC-120012-NP

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BOP Design


ASME S III ASME Sec. III

ASME Sec. VIII

ASME AG 1 1997 Code on Nuclear Air and Gas Treatment ASME AG-1-1997, Code on Nuclear Air and Gas Treatment

ASHRAE 15-1994, Safety Standards for Refrigeration Systems

HI Standards

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HI Standards

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BOP Design

System classification System classification

Component Safety Electrical Seismic Component Class Class Category

Essential chiller 3 1E I

Chilled water pump 3 1E I

Chilled water makeup pump 3 1E I

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p p p

Compression tank 3 N/A I

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Chemical additive tank NNS N/A II

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Demi. makeup control valve NNS Non-1E II

67 APR1400-E-M-EC-120012-NP

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(NNS : Non-Nuclear Safety)

BOP Design

System Function

Safety function

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BOP Design

Provide chilled water to the safety-related cooling coils of HVAC

Safety function

Provide chilled water to the safety related cooling coils of HVAC

equipment during all plant conditions.

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APR1400-E-M-EC-120012-NP

BOP Design


Schematic diagram


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70

8th

P

BOP Design

Schematic diagramw

Mee

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Rev

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71

8th

P

APR1400-E-M-EC-120012-NP

BOP Design


Essential chiller


Two (2) x 100% capacity per division

Water cooled type, ASME Section III designate coo ed type, S Sect o des g

Use environment friendly refrigerants

Refrigerant relief vent and gas detector in accordance with ASHRAE

w M

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Refrigerant relief vent and gas detector in accordance with ASHRAE

15

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Essential chilled water pump

Two (2) x 100% capacity per division

Pre

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cat

Centrifugal, ASME Section III design

72

8th

P

APR1400-E-M-EC-120012-NP

BOP Design

C (C )

Compression tank

Component description (Cont.)

Compression tank

One (1) x 100% capacity per division

Horizontal ASME Section III design Horizontal, ASME Section III design

Maintain a minimum pressure in the system, and allow the liquid

volume to expand and contract resulting from temperature

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volume to expand and contract resulting from temperature

changes.

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APR1400-E-M-EC-120012-NP

BOP Design

Component description (Cont )

Chilled water makeup pump


Chilled water makeup pump


Centrifugal ASME Section III design Centrifugal, ASME Section III design

Provide the makeup water from the aux. feedwater storage tank, in

case of loss of normal makeup water source

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case of loss of normal makeup water source.

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APR1400-E-M-EC-120012-NP

BOP Design

C (C )

Chemical additive tank


Chemical additive tank


Horizontal ASME Section VIII design Horizontal, ASME Section VIII design

Manually feed the corrosion inhibitors to the system, as required.

w M

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ng Air separator


tio

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( ) p y p

Tangential flow type, ASME Section III design

Use to release air from water

Pre

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75

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P

APR1400-E-M-EC-120012-NP

BOP Design

System Operation

Normal, abnormal and accident operation

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BOP Design

N l b l & id t ti

Initial filling with demineralized water from the makeup demineralizer

Normal, abnormal & accident operation

g p

system.

The condenser of essential chiller is supplied with component cooling pp p g

water as a cooling source.

The essential chiller and pump are manually started by hand switch in

w M

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The essential chiller and pump are manually started by hand switch in

the Main Control Room (MCR) or Remote Shutdown Room (RSR) or

Local Control Panel (LCP).

tio

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( )

The chiller and associated pump are interlocked such that only one

chiller and pump per division can run at a time.

Pre

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cat p p p

Standby chiller/pump automatically start when a pump or chiller trip per

division.

77

8th

P

APR1400-E-M-EC-120012-NP

division.

BOP Design

A cross connection piping with a manual isolation valve is provided at the


A cross connection piping with a manual isolation valve is provided at the

discharge of two chilled water pumps, as a back-up.

Abnormal and accident operation are basically same as the normal power Abnormal and accident operation are basically same as the normal power

operation.

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APR1400-E-M-EC-120012-NP

BOP Design

Normal, abnormal & accident operationNormal, abnormal & accident operationEssential Chilled Water System (Div. I)

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APR1400-E-M-EC-120012-NP

BOP Design


Essential Chilled Water System (Div. II)

, pw

Mee

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Rev

iew

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80

8th

P

APR1400-E-M-EC-120012-NP

BOP Design



Water hammer

Loss of normal makeup water system

Interface with NSR chilled water system

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ITAAC

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Pre

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81

8th

P

BOP Design

APR 1400 approaches


APR 1400 approaches

Current approach is based on the Industry practice and engineering

judgementjudgement.

Additional margin will be acquired during equipment procurement by

vendors

w M

eeti

ng

vendors.

Maintenance and replacement of components will restore margin

lost due to degradation

tio

n R

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w lost due to degradation.

Adequate margin will be ensured considering the above.

Pre

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82

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APR1400-E-M-EC-120012-NP

BOP Design

ECWS is designed to minimize the potential of water hammer by

Water hammer

ECWS is designed to minimize the potential of water hammer by

following the guidance in NUREG-0927. High point vent / Low point drain Compression tank & relief valve Air separator No isolation control valve in the main line

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ng

No isolation control valve in the main line

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APR1400-E-M-EC-120012-NP

BOP Design

L f l k t t

Th l k t i id d f f t l t d k

Loss of normal makeup water system

The normal makeup water is provided from non-safety related makeup

demineralizer system.

SRP 9.2.2 requires that the surge tank have sufficient capacity to

accommodate expected leakage from the system for seven days, or a

w M

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ng seismic source of makeup can be made available within a time frame

consistent with surge tank capacity.

tio

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To meet the SRP requirements, the chilled water makeup pump is

provided to supply the makeup water from aux feedwater storage tank

Pre

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cat provided to supply the makeup water from aux. feedwater storage tank

(seismic category I), in case of loss of normal makeup water source.

84

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P

APR1400-E-M-EC-120012-NP

BOP Design

Interface with non safety related chilled water Interface with non-safety related chilled water system

The essential chilled water system and non-safety related chilled water

system are physically separated and independent to each other.

The essential chilled water system provides chilled water to safety-

l d l

w M

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ng

related components only.

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APR1400-E-M-EC-120012-NP

BOP Design

Basic criteria

Failure Modes & Effects Analysis (FMEA)

Basic criteria

Ensure that redundancy of system function exists in case of single

active failureactive failure

Scope of equipment (all active components)

w M

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ng Essential chiller

Essential chilled water pump

tio

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p p

Essential chilled water makeup pumps

All active valves

Pre

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cat All active valves


86

8th

P

APR1400-E-M-EC-120012-NP

BOP Design

ITAAC

ITAAC for all safety-related components will be developed based on

ITAAC

ITAAC for all safety related components will be developed based on

SRP 14.3.

Inspectability and testability of each ITAAC item will be reviewed

based on the inspection/test procedures of SKN 3&4.

w M

eeti

ng


inspection test and analysis will be reviewed based on the experience

tio

n R

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w inspection, test and analysis will be reviewed based on the experience

with SKN 3&4.

Pre

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87

8th

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APR1400-E-M-EC-120012-NP

BOP Design

I t t ti d C t l

Major instrument

Instrumentation and Controls

j

Level switch for compression tank


For each instrument following discussion will be included in DCD;

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ng

For each instrument, following discussion will be included in DCD;

MCR/RSR indication

MCR/RSR l

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Control function

Pre

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(RSR : Remote Shutdown Room)

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APR1400-E-M-EC-120012-NP

BOP Design


4. Safety-Related HVAC System

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4. Safety Related HVAC System

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BOP Design

Safety-Related HVAC System

Control Room HVAC System

ESF HVAC System

- Emergency Diesel Generator Area HVAC System

- Electrical and I&C Equipment Areas HVAC System

w M

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ng - Auxiliary Building Controlled Area HVAC System

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P

BOP Design

Control Room HVAC SystemIntroduction

System function

SSystem operation


D i id i f i DC i i

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Design consideration for important DC review items

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BOP Design

Introduction

Overview




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BOP Design

Overview

Two (2) independent divisions, seismic category I

Overview

Maintain habitability

Maintain the Control Room Envelope (CRE) at a positive pressure

Limit the radiation exposure of personnel

w M

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and toxic gas

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APR1400-E-M-EC-120012-NP

BOP Design

10 CFR 50 App A


10 CFR 50, App. A

GDC 2 : Design Bases for Natural Phenomena

GDC 4 D i B f E i t l d D i Eff t GDC 4 : Design Bases for Environmental and Dynamic Effects

GDC 19 : Control Room

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ng

GDC 60 : Control of Release of Radioactive Materials

RG 1.52, Rev.3 Design, Testing, and Inspection Criteria for Air Filtration

tio

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Atmosphere Cleanup System in Light-Water-Cooled Nuclear Power

Pre

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cat

Plant

RG 1.78, Rev.1 Evaluating the Habitability of a Nuclear Power Plant

94

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APR1400-E-M-EC-120012-NP

Control Room During a Postulated Hazardous Chemical Release

BOP Design

ASME Sec III


ASME Sec. III

ASME AG-1-1997, Code on Nuclear Air and Gas Treatment

ASME N509 1987 N l P Pl t Ai Cl i U it d ASME N509-1987, Nuclear Power Plant Air-Cleaning Units and

Components

ANS 59 2 R 3 S f t C it i f HVAC S t L t d O t id

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ANS 59.2, Rev.3, Safety Criteria for HVAC System Located Outside

Primary Containment

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BOP Design

System classification System classification

Component Safety Class

Electrical Class

Seismic CategoryClass Class Category

Supply AHU 3 1E I

Emergency make-up ACU 3 1E I

Intake isolation damper 3 1E I

w M

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ng Kitchen & toilet exhaust isolation

damper 3 1E I

Kit h & t il t h t f NNS N 1E II

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n R

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w Kitchen & toilet exhaust fan NNS Non-1E II

Computer room Packaged Air Conditioning Unit (PACU) NNS Non-1E III

Pre

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Humidifier NNS Non-1E II

Smoke removal fan NNS Non-1E II

96 APR1400-E-M-EC-120012-NP

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P Smoke removal fan NNS Non 1E II

BOP Design

System Function

Safety function

Non-safety function

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BOP Design

Safety function

Maintain the suitable environment for personnel comfort health safety Maintain the suitable environment for personnel comfort, health, safety,

and proper function of equipment and controls in the Control Room

Envelope (CRE)Envelope (CRE).

CRE includes the followings, as minimum

w M

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ng - MCR

- Computer room- Technical Support Center (TSC) areas

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- HVAC equipment room

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BOP Design

Safety function (Cont.)

On receipt of Safety Injection Actuation Signal (SIAS) or Control Room On receipt of Safety Injection Actuation Signal (SIAS) or Control Room

Emergency Ventilation Actuation Signal (CREVAS)

Limit the introd ction of potential radioacti e contaminants b Limit the introduction of potential radioactive contaminants by

maintaining the Control Room Envelope (CRE) at a minimum 1/8

(0 125) inch water gauge of positive pressure

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(0.125) inch water gauge of positive pressure

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BOP Design

Non-safety function

Computer room Packaged Air Conditioning Unit (PACU) maintains the Computer room Packaged Air Conditioning Unit (PACU) maintains the

suitable environment condition for computer room.

Air from toilet, kitchen and shower room is exhausted to the atmosphere

by a toilet/kitchen exhaust fan.

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Smoke is removed by a smoke removal fan, after suppression of a fire.

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BOP Design


Schematic diagram


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BOP Design

Schematic diagram Schematic diagram w

Mee

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on

Rev

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RE : Radiation Monitor

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APR1400-E-M-EC-120012-NP

RE : Radiation MonitorXS : Smoke DetectorPD : Pressure Differential SwitchE/H : Electro-Hydraulic

BOP Design

Component descriptionComponent description

Supply AHUpp y

Four (4) x 100% capacity

Consist of a pre-filter a cooling coil an electric heating coil and a fan Consist of a pre filter, a cooling coil, an electric heating coil and a fan.

Emergency make-up ACU

w M

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ng Two (2) x 100% capacity

Consist of a moisture separator, an electric heating coil, a pre-filter, a

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HEPA filter, a carbon adsorber, a post filter and a fan.

ASME AG-1, N509 and RG 1.52

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BOP Design

System Operation

Normal operation

Abnormal operation

Accident operation

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BOP Design

Normal Operation

Make up outside air is drawn into the system through one of missile Make-up outside air is drawn into the system through one of missile

protected outside dual air intakes.

The air is filtered, cooled or heated through the supply AHU and

distributed to the CRE to maintain the suitable environmental condition

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ng and to maintain a minimum 1/8 (0.125) inch water gauge of positive

pressure with respect to the surroundings.

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Air from toilet, kitchen and shower room is exhausted to the atmosphere

by a toilet/kitchen exhaust fan

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BOP Design

Normal Operationp

Control Room HVAC System (Normal Mode)

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APR1400-E-M-EC-120012-NP

RE : Radiation MonitorXS : Smoke DetectorPD : Pressure Differential SwitchE/H : Electro-Hydraulic

BOP Design

Ab l O ti (R i l ti M d )Abnormal Operation (Recirculation Mode)

Upon detection of high levels of smoke in the outside air intake,p g ,

Manual close air intake isolation damper at air intake induced smoke

oror

Manual switchover to recirculation mode without outside makeup air

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ng Manual switchover to recirculation mode when the presence of toxic gas

is sensed by the operator in the control room.

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No pressurization of the CRE takes place in the Recirculation Mode.

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BOP Design

Abnormal Operationp

Control Room HVAC System (Recirculation Mode)

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APR1400-E-M-EC-120012-NP

BOP Design

A id t O ti (E M d )Accident Operation (Emergency Mode)

On receipt of Safety Injection Actuation Signal (SIAS) or Control RoomOn receipt of Safety Injection Actuation Signal (SIAS) or Control Room

Emergency Ventilation Air Signal (CREVAS), and the emergency makeup

ACU is automatically started.y

The outside air from the lower radioactivity outside air intake is

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automatically selected.

The ACU filters particulates and potential radioactive iodine from all of

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The ACU filters particulates and potential radioactive iodine from all of

the return and makeup air, and delivers the filtered air to the supply AHU.

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The CRE maintains at a minimum 1/8 (0.125) inch water gauge positive

pressure.

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BOP Design

Accident Operationp

Control Room HVAC System (Emergency Mode)

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BOP Design

Design Consideration for Design Consideration for Important DC Review ItemsAir intake


ITAAC


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BOP Design

Air intake

Dual air intakes are equipped with safety-related radiation monitors.

The dual air intakes are located on the south and north wall at elevation The dual air intakes are located on the south and north wall at elevation

187 ft in Aux. Bldg.

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ng Distance from radiation source

Horizontal : App. 75 ft (from inside wall of Containment Bldg.)

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Vertical : App. 10 ft (from roof of Aux. Bldg.)

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Result of radiological consequence analysis meets the maximum

radiation dose to CRE occupant.

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BOP Design

B i i i


Basic criteria

Ensure that redundancy of system function exists in case of single

active failure

Scope of equipment (all active components)

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Scope o equ p e t (a act e co po e ts)

Supply AHUs

Emergency makeup ACUs

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Isolation control dampers

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BOP Design

ITAAC

ITAAC for all safety-related components will be developed based on

SRP 14.3.

Inspectability and testability of each ITAAC item will be reviewed

based on the inspection/test procedures of SKN 3&4

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based on the inspection/test procedures of SKN 3&4.

Availability of detailed design documents and drawings need for

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with SKN 3&4.

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BOP Design

I t t ti d C t l

Major instruments


Major instruments

Radiation monitor, smoke detector, temperature indicator, pressure

differential switchdifferential switch


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For each instrument, following discussion will be included in DCD;

MCR/RSR i di ti

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MCR/RSR alarm

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Control function

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BOP Design

ESF HVAC SystemsEmergency Diesel Generator area HVAC system

Electrical and I&C equipment areas HVAC system

Auxiliary building controlled area HVAC system

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BOP Design

ContentsIntroduction

System function


System operation

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Design consideration for important DC review items

Summary

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BOP Design

Introduction

Overview



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BOP Design

Overview

Design based on the ambient design temperature of the APR1400

Overview

enveloped site design parameters

Safety-related equipment area : 0% exceedance values

- Maximum ambient design temperature: 115℉ dry bulb

- Minimum ambient design temperature: -40℉ dry bulb

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- Maximum ambient design temperature: 100℉ dry bulb

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Maximum ambient design temperature: 100℉ dry bulb

- Minimum ambient design temperature: -10℉ dry bulb

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BOP Design

NRC regulatory requirements 10 CFR 50 App. A, GDC 2, 3, 4, 17 and 60

g y q

GDC 2 : Design Bases for Protection against Natural Phenomena GDC 3 : Fire Protection GDC 4 : Environmental and Dynamic Effects Design Basesy g GDC 17 : Electric Power Systems GDC 60 : Control of releases of radioactive materials to the

environment

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environment

US NRC Regulatory Guide

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RG 1.29, Rev.4 : Seismic Design Classification

RG 1 52 R 3 D i I ti d T ti C it i f

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cat RG 1.52, Rev.3 : Design, Inspection, and Testing Criteria for

Filtration and Adsorption Units of Post-Accident Engineered-Safety Feature Atmosphere Cleanup Systems in Light-Water-Cooled N l P Pl t

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Nuclear Power Plants

BOP Design


US NRC Regulatory Guide (Continued)

g y q

RG 1.128, Rev.2 : Installation Design and Installation of Vented Lead-Acid Storage Batteries for Nuclear Power Plants

RG 1.140, Rev.2 : Design, Inspection, and Testing Criteria for Air Filtration and Adsorption Units of Normal Atmosphere Cleanup

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ng Systems in Light-Water-Cooled Nuclear Power Plants

SRP 9.4.5, Rev.3 : Engineered Safety Feature Ventilation System

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SRP 9.4.5, Rev.3 : Engineered Safety Feature Ventilation System

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BOP Design


ASME Sec.III Div.1 : Rules for Construction of Nuclear Power PlantComponents

y

Components

ASME AG-1, 1997 : Code on Nuclear Air and Gas Treatment ASME N509 1989 : Nuclear Power Plant Air-Cleaning Units and ASME N509, 1989 : Nuclear Power Plant Air Cleaning Units and

Components

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BOP Design

System Function

EDG area HVAC system

Elect. and I&C equip. areas HVAC system

Aux. building controlled area HVAC system

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BOP Design


Safety function


Maintain suitable environmental conditions of the EDG area

Provide continuous ventilation of the EDG area to prevent possible

accumulation of oil fumes

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BOP Design

Elect and I&C equip areas HVAC system Safety function

M i t i th d i t t f th f t l t d l t i l d


Maintain the design temperature of the safety-related electrical and I&C equipment rooms

Maintain the hydrogen gas concentration to less than 1% of the total y g g %volume of the class 1E battery rooms in accordance with RG 1.128

N f t f ti

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Non-safety function Provide ventilation for electrical and I&C equipment areas

Maintain the design temperature of the non-safety related electrical

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Maintain the hydrogen gas concentration to less than 1% of the total

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volume of the non-1E battery rooms in accordance with RG 1.128

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BOP Design

Aux building controlled area HVAC system Safety function

M i t i th d i t t f th E C C li


Maintain the design temperature of the Emergency Core Cooling System (ECCS) equipment rooms

Maintain the ECCS equipment rooms under a slightly negative q p g y gpressure with respect to the surrounding areas upon receipt of Safety Injection Actuation Signal (SIAS)

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Filter potentially contaminated air from postulated ECCS equipment leakage

Maintain the integrity of the ventilation boundary by closing safety-

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BOP Design

Aux building controlled area HVAC system Non–safety function

M i t i it bl i t l diti h t t


Maintain suitable environmental conditions such as temperature, ventilation, pressure and radioactivity of aux. building controlled area including the HELB (High Energy Line Break) area during normal operation

Maintain the aux. building controlled area under a slightly negative ith t t th di

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pressure with respect to the surrounding areas

Filter potentially contaminated air from the aux. building controlled area

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Maintain the potentially high contamination area under a slightly negative pressure with respect to the potentially low contamination

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BOP Design





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BOP Design

EDG area HVAC systemEDG area HVAC system

Schematic diagram

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EDG area HVAC system System classification

y

Component SafetyClass

ElectricalClass

SeismicCategory

N l l AHU 3 1E ⅠNormal supply AHU 3 1E Ⅰ

EDG room exhaust fan 3 1E Ⅰ

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makeup tank room exhaust fan 3 1E Ⅰ

Diesel fuel oil storage tank room

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Diesel fuel oil storage tank roomsupply and exhaust fans 3 1E I

Diesel generator control room cubicle cooler 3 1E I

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EDG room emergency cubicle cooler 3 1E I

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Elect. and I&C equip. areas HVAC systemElect. and I&C equip. areas HVAC system

Schematic diagram

CLASS 1E BATTERY ROOM

HC

EL

O.ACLASS 1E

BATTRY RMEXHAUST FAN

CLASS 1EBATTRY RM

TO ATM.

CC

CW

EDH

SAFETY-RELATEDCUBICLE COOLER

CLASS 1E BATTERY ROOMSUPPLY FAN

O.A

RSRSUPPLY FAN

RSR EXHAUST FAN TO ATM.

CC

CW


HC

EDHEL

HC

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CC

CW

REMOTE SHUTDOWN ROOMRSRSUPPLY FAN RSR

EXHAUST FAN

HUMIDIFIER

EDHEL

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TO ATM.

AUX. BLDG. CLEAN AREAESHAUST FAN

SAFETY-RELATED ELECT. AND I&C EQUIPMENT ROOMS

CW

CC

CW

CC

CW

HC

EL

SYS

.

AUX.BLDG. CLEAN AREA SUPPLY AHU

AUX.BLDG. CLEAN SUPPLY CHASE

O.A SAFETY-RELATEDCUBICLE COOLER

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NON-1E BATTERY

TO ATM.

EDH

HC

EL

NON-1E BATTARY ROOM

CW

VO

NON-SAFETY RELATEDELECT. AND I&C

EQUIPMENT ROOMS

NON-SAFETY RELATEDCUBICLE COOLER

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NON-1E BATTERY ROOM

EXHAUST FAN

EDH

BOP Design

Elect. and I&C equip. areas HVAC system System classification


Component Safety Class ElectricalClass

SeismicCategory

Safety-related cubicle coolers 3 1E ⅠSafety related cubicle coolers 3 1E Ⅰ

Class 1E battery room supply / exhaust Fan 3 1E Ⅰ

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RSR (Remote Shutdown Room)supply / exhaust fan

3 1E I

Non-safety related cubicle NNS

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Safety)Non-1E II

Non-1E battery room exhaust NNS Non-1E II

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Aux building controlled area HVAC system Schematic diagram


HC

EL

HC

EL

DIVISION IIDIVISION ICC

CW

CC

CW

HC

HC

HC

EL

HC

EL

HC

EL

HC

EL

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ng

ELEL

HC

EL

HC

EL

CC

CW

HC

EL

O.A

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HC

EL

HC

EL

HC

EL

HC

EL

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HC

EL

HC

EL

HC

EL

HC

EL

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Aux building controlled area HVAC system System classification

Electrical Seismic


Components Safety Class ElectricalClass

SeismicCategory

ECCS equipment room exhaust 3 1E I

ACU

Safety-related cubicle cooler 3 1E I

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supply AHU

NNS(Non Nuclear

Safety)Non-1E II

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NNS Non-1E II

HELB area supply AHU NNS Non-1E II

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HELB area exhaust ACU NNS Non-1E II

Non-safety related cubicle cooler NNS Non-1E II

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Non-safety related cubicle cooler NNS Non-1E II

BOP Design

System OperationEDG area HVAC system



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BOP Design

EDG area HVAC systemy

Normal operation

The outside air is drawn into the EDG room normal supply AHU through

a missile protected air intake structure.

The air is filtered, heated or cooled by the supply AHU and distributed to

the EDG area.

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ng The air is exhausted and released to the atmosphere by diesel F.O. day

tank & L.O. makeup tank room exhaust fan and the EDG room exhaust

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BOP Design


Normal operation (continued)

The diesel F.O. storage tank room is ventilated by the diesel F.O.

storage tank room supply and exhaust fan.

The D/G control room cubicle cooler operates automatically according to

the room temperature.

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Normal operation

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BOP Design


EDG operating condition

The EDG area HVAC system operates same as normal operation during

EDG operating condition except the EDG room emergency cubicle

coolers.

The EDG room emergency cubicle coolers operate automatically

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ng according to the EDG room temperature rising caused by the EDG

operation.

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EDG operating condition

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BOP Design

Elect and I&C equip areas HVAC system

Normal operation


The electrical and I&C equipment areas are conditioned by the aux.

building clean area HVAC system.

Filtered and conditioned air is supplied from the aux. building clean area

supply AHU and the air is exhausted by the aux. building clean area

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ng exhaust fan.

Safety-related and non-safety related cubicle coolers for each room

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The non-1E battery room is exhausted by the non-1E battery room

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exhaust fan.

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The class 1E battery room and the remote shutdown room are ventilated

by the supply and exhaust fans for each room.

Electric duct heaters are provided for the class 1E and non-1E battery

rooms and the remote shutdown room to maintain the required room

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A humidifier is provided for the remote shutdown room to maintain the

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component.

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Elect and I&C equip areas HVAC system Normal operation



HC

EL

O.A

CLASS 1EBATTRY RM

EXHAUST FANCLASS 1E

BATTRY RM

TO ATM.

CC

CW

EDH


CLASS 1E BATTERY ROOM EXHAUST FANSUPPLY FAN

O.A TO ATM.

CC

CWRSRSUPPLY FAN

RSR EXHAUST FAN


HC

EL

EDH

HC

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CC

CW

REMOTE SHUTDOWN ROOMRSRSUPPLY FAN

RSR EXHAUST FAN

HUMIDIFIER

EL

EDH

tio

n R

evie

w

TO ATM.

AUX. BLDG CLEAN AREAESHAUST FAN


CW

CC

CC

CW

HC

EL

SYS.




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NON-1E BATTERY

TO ATM.

HC

EL

NON-1E BATTARY ROOM

CW

VO

NON-SAFETYRELATEDCUBICLE COOLER

NON-SAFETY RELATEDELECT. AND I&C

EQUIPMENT ROOMS

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NON-1E BATTERY ROOM

EXHAUST FAN

EDH

BOP Design


Accident operation


Accident operation of this system is the same as normal operation

except that the non-safety related HVAC equipment is inoperable.

The electrical and I&C equipment areas may not be ventilated during

accident operation.

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Elect and I&C equip areas HVAC system Accident operation



HC

EL

O.ACLASS 1E

BATTRY RMEXHAUST FAN

CLASS 1EBATTRY RM

TO ATM.

CC

CW

EDH


CLASS 1E BATTERY ROOM EXHAUST FANSUPPLY FAN

O.A

RSRSUPPLY FAN

RSR EXHAUST FAN TO ATM.

CC

CW


HC

EL

EDH

HC

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CC

CW

REMOTE SHUTDOWN ROOMRSRSUPPLY FAN

RSR EXHAUST FAN

HUMIDIFIER

HC

ELEDH

tio

n R

evie

w

TO ATM.

AUX. BLDG. CLEAN AREAESHAUST FAN


CW

CC

CC

CW

HC

EL

SYS.




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NON 1E BATTERY

TO ATM.

HC

EL

NON-1E BATTARY ROOM

NON-SAFETY RELATED ELECT. AND I&C

EQUIPMENT ROOMS

CW

VO S

NON-SAFETY RELATEDCUBICLE COOLER

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NON-1E BATTERY ROOM

EXHAUST FAN

EDH

BOP Design

Aux building controlled area HVAC system

Normal operation


The aux. building controlled area supply AHU supplies filtered and

conditioned air to the controlled area except the HELB area.

The air is filtered and exhausted to the atmosphere by the aux. building

controlled area normal exhaust ACU.

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HELB area.

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The air is filtered and exhausted to the atmosphere by the HELB area

ACU.

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Non-safety related and safety-related cubicle coolers operate

automatically according to the room temperature to maintain the room

design temperature.

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Aux building controlled area HVAC system Normal operation

Aux. building controlled area HVAC systemw

Mee

tin

gti

on

Rev

iew

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BOP Design


Accident operation


Upon receipt of SIAS, the ECCS equipment room exhaust ACU

operates and the safety-related isolation dampers connected to the

atmosphere are closed automatically.

The aux. building controlled area supply AHU and normal exhaust ACU

w M

eeti

ng are interlocked to stop by the isolation dampers close signal.

The ECCS equipment room exhaust ACU maintains the ECCS

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potentially contaminated air from the ECCS equipment rooms.

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BOP Design


Accident operation (continued)


The ECCS equipment room exhaust ACUs are cross-connected and the

ACU fans are interlocked to operate the standby fan in case that the

running fan stops.

The safety-related cubicle coolers operate automatically according to

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equipment rooms.

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Aux building controlled area HVAC system Accident operation


HC

EL HC

EL

DIVISION IIDIVISION ICC

CW CC

CW

HC

EL

HC

EL

HC

EL

HC

EL

HC

EL

HC

EL

w M

eeti

ng HC

EL

HC

EL

CC

CW

HC

EL

O.A

tio

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HC

EL

HC

EL

HC

EL

HC

EL

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HC

EL

HC

EL

HC

EL

HC

EL

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BOP Design

Design Consideration forDesign Consideration forImportant DC Review Items


Instrumentation and Control

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Failure Modes & Effects Analysis (FMEA)y ( ) Scope of equipment

System Active Component

EDG area HVAC system- Normal supply AHU- Supply and exhaust fans- Cubicle coolers

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Electrical and I&C equipmentareas HVAC system

- RSR supply and exhaust fan- Class 1E battery room supply and exhaust fans- Safety-related cubicle coolers

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Aux. building controlled areaHVAC system

- ECCS equipment room exhaust ACU fan- ECCS equipment room exhaust ACU heating coil- ECCS equipment room exhaust ACU inlet and outlet Isolation dampers

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Isolation dampers- Aux. building controlled area isolation dampers

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BOP Design

Instrumentation and Control Major Instruments

System Major InstrumentsSystem Major Instruments

EDG area HVAC system- Smoke detector of the intake air- Temperature indicator of the EDG room

Electrical and I&C equipmentareas HVAC system

- Temperature indicator of the safety-related electrical and I&C equipment rooms

- Radiation monitor

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- Pressure differential indicator- Temperature indicator of safety-related equipment

rooms

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For each instrument following discussion will be included in DCD :

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cat For each instrument, following discussion will be included in DCD : MCR /RSR Indication MCR/RSR Alarm

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Control Function

BOP Design

Summaryw

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Summary

Safety-related BOP systems of APR1400 are designed in accordance

y

with the USNRC regulatory requirements.

Design considerations for important DC review items have been reviewed

and incorporated into APR1400 design.

Comments and feedback from NRC staffs will be incorporated into DCD.

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Documents

Pre-Application Review Meeting BOP Design of APR1400 · Meeting Design consideration for important DC review items t ion Revie P re-applica 2 8th . BOP Design Introduction Overview