laDuke5fEnergy..

Duke PowerAppendix R

ReconstitutionOconee (ONS)Catawba (CNS)

9f 9-9-9--9-9-T McGuire (MNS)

December 06, 2004Attachment 2

liiDulkeMVEnergYy Appendix R Reconstitution

Duke ParticipantsAppendix R Working Group

Harry Barrett - Appendix R Working Group Lead (ONS)David Goforth - Appendix R Engineer (CNS)Bob Johansen - Appendix R Engineer (MNS)Dennis Henneke - PRA Engineer (NGO - Severe AccidentAnalysis)James Oldham - Fire BEST Lead (MNS)

Reene' Gambrell, Regulatory Compliance (ONS)Graham Davenport -Regulatory Compliance Manager(ONS)George Mc Aninch - Design Basis Group Manager (ONS)Duncan Brewer - SAA Manager (NGO)

2

Zuuxe Appendix RReconstitution Agenda

PurposeGoalsBackgroundSafe Shutdown Methodology

Manual Action ProcessIssue Resolution ProcessConfiguration Management

Armored Cable Fire TestingScheduleSummary

3

DukeEnergy. Purpose of Meeting

Duke Power Appendix R ReconstitutionProjectEstablish a Dialog to discuss potential issues

Design/Licensing Basis ImprovementsMultiple Spurious ActuationsManual ActionsArmored Cable Fire Testing

4

UUKM Goals of Appendix Rr Enerfy . .

Reconstitution Proj ect

Strengthen Appendix R Programs to bringclarityClear Up design and licensing issues

- Improve Design and LicensingDocumentation Quality and CompletenessImprove safety (do the right thing)

5

DukeEnergy5. B ackground

Recent experience with Appendix R Safe Shutdownanalysis at all three sites indicated opportunities toimproveStarted to respond to issues separately at each siteONS performed an Appendix R Program SelfAssessment in 2002ONS Initially Created Reconstitution Project to tracecables and correct documentation deficienciesAudit/Inspection findings and newly identifiedcompliance issues at all units eventually drove theformation of 3-Site Appendix R Working GroupReconstitution planned for all Duke units

6

Energy,, Background - Continued

Duke Unique Features and ApproachesArmored Cable- Longer time to damage, lower spurious operation

probability, no cable-to-cable interactions- Exclusionary Analysis

Did not originally trace all cables, onlyopposite/available train cables for each fire area

Oconee Facility DesignClass 1 E Electrical Distribution located in mostsignificant fire area (Turbine Building)No train separationAll trains of EFW in Turbine Building

7

DukeEnergy. Background - Continued

Duke Unique Features and ApproachesStandby Shutdown Facility

Bunkered facility with separate power andprovide RCP seal cooling and decay heat

; Single Spurious design basisSingle, worst case spurious, addressed indocuments but not in SER

Three different licensing criteria (AppendixAppendix R and NUREG 0800)

Standardization is difficult

control toremoval

design

R, post

8

Appendix R ReconstitutionIF

g Safe Shutdown Methodology--------

Based on methodology outlined in NEI 00-01:Incorporates Industry Operating Experience1- NRC RIS 2004-03- NEI 00-01 Rev. 1

NEI 04-06

9

bDuke Appendix R ReconstitutionEnergy. Safe Shutdown Methodology -

continued

Split into Three Phases:Phase I - Safe Shutdown Equipment List(SSEL) and Logic DiagramsPhase 11 - Cable and Fire Area Analysis -identifies all cable/component "hits"Phase Ill - Performance Based/Risk Informedanalysis of multiple spurious actuations

10

i Duke'Energy..

Appendix R ReconstitutionSafe Shutdown Methodology -continued

Phase IDefine Safe Shutdown Functions, Systems andComponentsSafe Shutdown components listed in a SafeShutdown Equipment List (SSEL)System and Component Dependencies aredocumented on System and Component LogicDiagrams

11

Duke Appendix R ReconstitutionEnergy. Safe Shutdown Methodology -

continuedSafe Shutdown Analysis Phase I

Define Appendix RRequirements J Identify equipment information

, Related to safe shutdown analysisIdentify Safe ;

Shutdown Functions Identify Dependencies betweenEquipment, support equipment

Identify Systems that can perform And systemsThese Safe Shutdown Functions I

Develop a list of safe shutdown Document DocumentEquipment in these systems Information Information

in System & in RelationalComponent Database

Logic Diagrams (SSEL) 12

hDuke Appendix R ReconstitutionEnergy. Safe Shutdown Methodology -

continued

Phase I IIdentify cables for each componentIdentify routing for each cableRouting through each Fire Area documentedFire Area damage assessments performedResults of damage assessments used with LogicDiagrams to determine impact on Safe ShutdownFunctionsLoss of Safe Shutdown Functions addressedthrough Appendix R Issue Resolution Process forspurious actuations within Design Basis 13

Appendix R ReconstitutionSafe Shutdown Methodology -continued

Safe Shutdown Analysis Phase 11.

I SSEL |

Identify circuits required forOperation of each safeShutdown equipment

Identify interlocked circuitsAnd cables whose failure may

Cause spurious actuations

Assign cables to equipment

I Identify routing of cables

Identify location ofCables by fire area

Determine equipment impactsTo safe shutdown functions

For fires in each fire area

14

iDukeE :nergy.

Appendix R ReconstitutionSafe Shutdown Methodology -continued

... Phase IIIResults of Phase 11 are combined with anextensive Multiple Spurious Review to addresscompleteness of multiple spurious population

Deterministic Analysis Output (Phase 11)- PRA Cut Set Review

Expert Panel Review

Loss of shutdown functions outside DesignBasis also addressed through Appendix RIssue Resolution Process

15

Duke Appendix R ReconstitutionEnergy. Safe Shutdown Methodology -

continuedSafe Shutdown Analysis Phase Ill

Phase 11 Results QualitativeEquipment Impacts Pre-Screening

By Fire Area

Identify circuits andPRA P&IDs & SSD Logic Expert Panel Routing affecting

Review Diagrams review Review Combination Of concern

s ,_Evaluate risk significanceCompile Component Of combination of concern

Combinations of IConcern Appendix R Issue

Resolution Process

16

rSM Manual Action Process

3-Site Engineering Guidance DocumentFeasibility Criteriacriteria)

(based on NRC interim

- Thermal-Hydraulic Analysisi- Graphical approach to document timelines

(MS Project)

17

k DukeF1 nergy.

Manual Action Process -Continued

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18--, -- -- .

DukeEnergyN. Issue Resolution Process

Appendix R Issue Resolution ProcessUses Logic Diagram to Direct User toappropriate actionSeparates Spurious Actuations to InsideLicense Basis and Outside License Basis

-- Treats Cable Routing/Spurious ActuationIssues as "Missing Fire Barrier"

- Addresses Operability issues for realhardware/performance problems

19

DukeFEnergy.

Issue Resolution Process -Continued

mffmmwm!�

20

U Energy. Configuration Management

Appendix R Reconstitution Project is also intended toaddress Configuration Management Issues- Design Documentation

Design Change ProcessSoftware Quality Assurance for Appendix R SafeShutdown Analysis Database(s)Engineering and Management Training on newAppendix R Safe Shutdown Analysis

21

fwergy, Arnmored Cable Fire Testing

Duke plans on performing additional firetesting of armored cable

More thoroughly determine robustness ofarmored cableDetermine spurious hot short probability givencable damage

- Use many configurations found in Duke PlantsDetermine sensitivity to various factors

Grounded vs. UngroundedLarge Multi-conductor vs. small

22

DukeEnergy. Status/S chedule

All three sites have completed Phase IONS is in process of completing Phase 11Expect to implement remaining Appendix RReconstitution tasks in staggered fashion(Dates are approximate):

;-- ONS Phases 11 and Ill complete in 2005MNS to complete by end of 2006CNS to complete by end of 2007

Dates may need to change pending decisionto transition to NFPA-805

23

lliDukeEnergy.. Summary

Duke Power plans to institute an Appendix RReconstitution Project at all three nuclear plantsitesProject intended to address programmaticweaknesses, incorporate latest industryguidance and clear up vague design basisThrough detailed cable/fire area analyses andrisk analysis methods, address multiplespurious actuationsStaggered implementation schedule - ONSfirst, MNS next, CNS last

24

DukeIfrLk man tu hg ai SM

Transition toNFPA-805Oconee (ONS)Catawba (CNS)McGuire (MNS)

December 6, 2004

1

Attachment 3

Duke'EnergyS

Outline

a Why are we here?

M Background

* Duke Status on NFPA-805

* Technical Issues

* Administrative Issues2

DukeEnergy. Why are We here?

Ma Duke Power continues to be interested in

Transitioning to NFPA-805, PerformanceBased, Risk-informed Fire protection. Ourpurpose here is to:* Provide discussion on why we are interested* Begin discussions with NRR on some of the

technical and administrative iss-ues.a We do not yet have full management buy-

in, but are pursuing buy-in and funding.3

|DulkeEnergy. Background

flmz��

* Duke Power has been an industry leaderin both Fire Protection and ProbabilisticRisk Assessment (PRA) for many years.

a Our power plants have unique attributesthat could be considered in a risk-informed approach:° Armored Cable throughout the plant* Standby Shutdown Facility - SSF

4

t F~ergy Background - Continued

* Our Fire Protection License Basis for allthree plants have areas that can bei nterpreted."

* We see the use of NFPA-805 as amethod for both clearing up our licensebasis, and assuring the fire risk at theplants is acceptable,

5

Energyn Present Status on NFPA-805

* Duke is contemplating transitioning to NFPA-805, with the following potential schedule:• Oconee starting in mid to late 2005• McGuire starting in mid 2006 to early 2007• Catawba starting in late 2007The Appendix R Reconstitution scheduleaffects NFPA-805 implementation schedule.

a Transition appears to be cost-beneficiala Several Technical Issues outstanding which

may affect our decision: Results in uncertaintyin cost

6

nert Su Technical Issues

Multiple Spurious• No Clear License Basis for Multiple Spurious* Will propose a new and clear License Basis in our

transition report, which will be consistent for all 3 sites.Proposed words would be something like the following:

The Safe Shutdown Analysis shall address all single spuriousand all potentially risk-significant multiple spurious (See nextslide).

* Expert Panel will be used at each site to supplementtraditional SSA (See NEI-00-01, Appendix F).

7

JbDuket Enerl

Technical Issues - Continued

* Potentially risk-significant:Risk is above Reg. Guide 1.174 criteria (CDF 1 E-06,LERF > 1 E-07), prior to operator response.

* DID or Safety Margins are inadequate per NEIImplementation Guide, prior to operator response.

* New Multiple Spurious scenarios identified areconsidered outside the license basis, until theyare determined to be potentially risk significant.

8

Duke111 ok Mu ai at WVw 'Technical Issues - Continued

Multiple Spurious Combinations that do notmeet the "Potentially Risk Significant" Criteria,but have an estimated CDF risk > 1 E-08/year(LERF > 1 E-09/year), are treated as follows:• Design change or procedure change put in place, if

possible* Procedural actions still meet feasibility criteria, but

actions- are not considered "required"

9

Technical Issues - Continued* Recovery Actions:

* Present Manual Actions at the plant will transitionover as recovery actions: Will need to meetfeasibility criteria.

* Options during transition:* Change Analysis is assumed not required for all

1Il.G.2 manual actions:However, develop deterministic criteria indicating whichactions need change analysis. For example:* All Il.G.2 manual actions that directly fail safe shutdown, or

following a single spurious.

* Change analysis required: Reevaluate manualactions determined to be low risk when the model is

10updated.

DukeFT erchi s

Technical Issues - Con inued

M Newfor aevento be

Requirement in DG-1 139(Section 3.1.2, dRisk Evaluation of each plant change,if the deterministic criteria are met needsclarified:

I)

* Large burden to perform a risk review for a changeof any document or system affecting fire safeshutdown.

a Present NEI Change process is reasonable.* Risk evaluations are then required when

deterministic criteria not met, as a part of the changeprocess.

11

A iF' 'r Administrative Issues

Duke Power will be performing Full Plant FirePRAs during the transition to NFPA-805:• Not required as a part of 805• Good idea for addressing circuit failures and multiple

spurious in a risk-informed way* PRA will meet Category 11 of the draft Fire PRA

standard, for fire areas where quantitative riskassessment is used for change evaluations:

Category I or qualitative evaluation OK if the risk increasefrom the change is very low.

12

Iff #ner ml.Administrative Issues - Cont.

* All three sites have URIs and recentissues including:* Issues raised during inspections* Self identified during self assessments, etc.

* If Duke transitions to NFPA-805, we willresolve these issues under NFPA-805.

13

Administrative Issues - Cont.

X Open issues:* Do previously identified issues receive

enforcement discretion, given NFPA-805implementation being scheduled for 2006-2007 for McGuire and Catawba?

* What about the ONS 95-002 inspectionscheduled for March 2005?

14

Duke

gym Schedule

* Jan. 16th deadline?M Will need feedback on the above issues by

the end of December if date is not extended.* Reg. Guide and NEI Implementation Guide

will not be complete by January 16th. Somedetails still a concern.

* 2 Year Transition:* Need to discuss options on delayed

transition.15