KSM-020 REV 6 - Welcome to eTenderPublication | National ... · (Sgd) NP MUNWANA (Sgd) B HENKERMAN (Sgd) ... Station 4.2.5 KSA-031: ... \ksm\authorised\ksm-020 rev 6.doc

$Page 1: KSM-020 REV 6 - Welcome to eTenderPublication | National ... · (Sgd) NP MUNWANA (Sgd) B HENKERMAN (Sgd) ... Station 4.2.5 KSA-031: ... \ksm\authorised\ksm-020 rev 6.doc$
j:\ksm\authorised\ksm-020 rev 6.doc © Eskom - 2013

STANDARD

Allocation Centre

38A

Reference Number KSM-020

Rev 6

NNR: NO

No.: POST MAINTENANCE REQUALIFICATION TESTING PAGE 1

KORC NO

ACCESS Nuclear Restricted

IMPORTANCE CATEGORYCSR

NEXT REVIEW DATE 2016-10-29

DATE AUTHORISED 2013-10-29

COMPILED / REVISED REVIEWED AUTHORISED

(Sgd) NP MUNWANA (Sgd) B HENKERMAN (Sgd) AI JOSEPH

NP MUNWANA B HENKERMAN AI JOSEPH

SENIOR TECHNICIAN MSS MMS MANAGER (ACTING) MAINTENANCE EXECUTION

MANAGER

DATE 2013-10-16 DATE 2013-10-16 DATE 2013-10-29

THIS STANDARD HAS BEEN SEEN AND ACCEPTED BY:

K Wilcox Document Custodian

B Taylor Plant Engineering (Acting)

B Johnson Electrical Maintenance Services

A Louw Instrumentation Maintenance Services

M Standaar Inspection and Test

A Ceto Engineering Programmes Department

M Mdolomba Quality Control

K Martin Component Engineering

N Njingana MSS Manager (Acting)

FCA

MAINTENANCE EXECUTION

ALARA REVIEW NO

SUPERSEDES KSM-020, Rev 5 dd. 2010-07-06 FULL REVIEW

KSM-020 Rev 6 Page 2


PAGE STATUS INDEX

REVISION REVISION

Page 5 6 Page

1 x x

2 x x

3 x x

4 x x

5 x x

6 x x

7 x x

8 x x

9 x x

10 x x

11 x x

12 x x

13 x x

14 x x

15 x x

16 x x

17 x x

18 x x

19 x x

20 x x

21 x x

22 x x

23 x x

24 x x

25 x x

END



CONTENTS PAGE

1.0 PURPOSE ..................................................................................................... 4

2.0 SCOPE .......................................................................................................... 4

3.0 DEFINITIONS AND ABBREVIATIONS ......................................................... 4

4.0 REFERENCES .............................................................................................. 5

5.0 REQUIREMENTS .......................................................................................... 6

6.0 ATTACHMENTS ............................................................................................ 10

Appendix 1 – Maintenance Activities that should be Considered as Possibly Affecting the Components Performance or Function .............................................................................. 11

Appendix 2 – Minimum Mandatory Requalification Requirements for Repair or Replacement of Piping and Valves by Welding ...... 24

Appendix 3 – Justification ............................................................................. 25



1.0 PURPOSE

1.1 To establish the requirements for Post Maintenance Re-qualification Testing within the Maintenance Department.

2.0 SCOPE

2.1 Applies to all Maintenance Groups and Sections specifying Post Maintenance Re-qualification Testing.

3.0 DEFINITIONS AND ABBREVIATIONS

3.1 Definitions

3.1.1 Corrective Maintenance – Actions that restore, by repair overhaul or replacement the capability of a failed SSC to function within acceptable criteria.

3.1.2 Deficient – Any condition that deviates from the design of a system or component of equipment and results in a degraded ability to accomplish its intended function.

3.1.3 Periodic Test – A functional test of installed equipment and/or systems to satisfy technical specification operability requirements.

3.1.4 Post-Maintenance Requalification Test – Any appropriate testing performed following maintenance to verify that a particular piece of equipment or system performs its intended function based on its design criteria and that the original deficiency has been corrected, or that preventive work has not had a degrading effect on the piece of equipment or system.

3.1.5 Preventive Maintenance – Actions that detect, preclude or mitigate degradation of a functional SSC to sustain or extend its useful life by controlling degradation and failures to an acceptable level.

3.1.6 Repair – The process of restoring an item by welding, brazing, metal removal or other means, such that existing design requirements are met.

3.1.7 Replacement – Process of substituting a component or part there of with a spare refurbished or modified item.

3.1.8 Work Package – A collection of maintenance documents used to control and record work in the plant from the time of identification until the satisfactory completion of the corrective and/or Preventative maintenance action and return to service.



3.2 Abbreviations

3.2.1 AOV – Air Operated Valve

3.2.2 AR – Availability Related

3.2.3 ASME – American Society Mechanical Engineers

3.2.4 CIV – Containment Isolation Valve

3.2.5 CSR – Critical Safety Related

3.2.6 EPD – Engineering Programmes Department

3.2.7 EQ – Equipment Qualification

3.2.8 FSP – Fail Safe Position

3.2.9 ISIPRM – In-Service Inspection Programme Requirements Manual

3.2.10 ISTPRM – In-Service Testing Programme Requirements Manual

3.2.11 LLRT – Local Leak Rate Test

3.2.12 MOV – Motor Operated Valve

3.2.13 OEM – Original Equipment Manufacturer

3.2.14 PIV – Primary Isolation Valve

3.2.15 RPI – Remote Position Indication

3.2.16 RPV – Reactor Pressure Vessel

3.2.17 PSI – Pre-Service Inspection

3.2.18 SR – Safety Related

3.2.19 SSC – Systems, Subsystems and Components

4.0 REFERENCES

4.1 Referenced Documents 4.1.1 335-2, Rev 1: Koeberg Nuclear Power Station Management Manual

4.1.1 KAA-500, Rev 12a: The Process for Controlled Documents

4.1.2 KSA-011, Rev 11: The Requirements for Controlled Documents



4.1.3 KSM-001, Rev 4: Compilation, Use and Adherence to Maintenance Working Procedures

4.1.4 KSM-006, Rev 10: Investigating, Compiling and Execution of Maintenance Work Packages

4.1.5 KSM-014, Rev 6: Requirements of Maintenance Quality Control

4.1.6 KWR-TP-IST-001, Rev 3b: Methodology for Analysis and Evaluations of Valve Test Results

4.2 Applicable Documents 4.2.1 KAA-647: Control of Non-Routine Testing

4.2.2 KAA-648: Administration and Responsibilities for Requalification Testing

4.2.3 KGA-081: Rework

4.2.4 KSA-021: Standard for In-Service Inspection at Koeberg Nuclear Power Station

4.2.5 KSA-031: Standard for the Repair/Replacement of Installed Mechanical Components

5.0 REQUIREMENTS

5.1 General

5.1.1 The scope of Post Maintenance Requalification Testing shall be based on the extent of preventive and/or corrective maintenance performed.

5.1.2 As a minimum all CSR, SR and AR plant equipment shall be requalified and tested following maintenance.

5.1.3 Post Maintenance Requalification Testing requirements shall be determined and the test performed for all corrective and preventive maintenance activities and troubleshooting activities that might have impaired proper functioning of the component.

5.1.4 Where possible tests shall be conducted under conditions that represent normal operating parameters, such as flow, differential pressure, level, temperature, input signal values and fluid type. Where this is not possible testing shall be performed either in accordance with acceptable industry practices, OEM instructions or instruction from the applicable engineering group. Examples of types of maintenance activities requiring post-maintenance testing:

• Maintenance that affects the integrity or operation of a fluid or gas system, or components within those systems.



• Maintenance that affects the wall thickness of pressure boundaries or affects mechanical strength of components or fittings.

• Maintenance that affects electrical distribution equipment.

• Maintenance that affects electrical control circuitry or electrical components.

• Maintenance that affects instrument detectors or components in an instrument loop.

• Maintenance that affects the engineered function of a system or component.

5.1.5 In some cases, tests may be conducted under conditions that represent abnormal or emergency operating conditions. For example, testing thermal overload relays on switchboards thus simulating a motor overload condition.

NOTE: All non-routine testing must be done in accordance with KAA-647.

5.2 Determining, Specifying and Reviewing the Post Maintenance Requalification Test to be Conducted

5.2.1 Determining the tests to be conducted.

5.2.1.1 During preparation of a maintenance work package the scope of testing required is determined by the requestor using sources such as testing requirements contained in existing authorised procedures, Equipment History, Vendor Manuals and consultations with Operating, Monitoring, Inspection or Testing Personnel.

5.2.1.2 As a minimum, the tests recommended for the maintenance activities listed in Appendix 1 and Appendix 2 (welding) of this Standard must be considered.

NOTE: The actual required testing must be tailored to the specific maintenance performed. Once tests are specified, they will be considered mandatory.

5.2.2 Specifying the Tests to be Conducted

5.2.2.1 The required Post Maintenance Requalification Testing must be specified in accordance with KAA-648.

5.2.3 Reviewing the tests to be conducted.



5.2.3.1 Before work is authorised to begin, a final review of the Requalification Testing identified must be conducted to determine if the specified testing is adequate for the intended work, i.e. the tests verify that the deficiency has been corrected.

NOTE 1: As required by KAA-648, all permit to work requests are reviewed to verify the adequacy of the specified post maintenance testing and identify additional testing as required.

NOTE 2: The primary purpose of this operating review is to ensure that testing restores technical specification operability and imposes no adverse effects on the system or equipment.

5.2.3.2 If the scope of work or testing expands beyond the original scope in the work package, work must be stopped and new or additional instructions must be written and authorised.

5.2.4 Troubleshooting Maintenance Work:

5.2.4.1 For troubleshooting maintenance work, the test requirements normally cannot be determined until the troubleshooting is complete. Thus, a detailed log must be kept of work performed during troubleshooting to ensure that post maintenance testing covers the troubleshooting scope. (Document in troubleshooting plan).

5.2.4.2 The maintenance work package with scope changes must be resubmitted for review once the problem has been determined. Post maintenance/Requal testing requirements must be included in the review.

5.3 Requalification Testing Procedures or Work Instructions

5.3.1 Dynamic Requalification Tests shall be conducted in accordance with written authorised procedures to verify that maintenance was performed properly, the initial deficiency was corrected by the maintenance activity and that the equipment/system/component will continue to perform as designed.

5.3.2 The procedures shall measure performance and allow for documentation and review of test data for the equipment and/or system. The data may become baseline data depending on the extent of the repair.

5.3.3 The Post Maintenance Testing procedure must be written in such a manner as to verify the satisfactory completion of the maintenance and verify system/equipment operability.

5.3.4 Test procedures must include details (as appropriate) such as initial conditions and prerequisites, hold points, precautions, personnel safety requirements, clear acceptance criteria and post-test restoration.



5.3.5 Instructions in the test procedure shall be as specific as possible and will avoid using vague criteria such as “verify proper operation” or “check for excessive temperature”.

5.3.6 Test equipment will be specified and provision made for recording the equipment identification.

5.4 Use of Existing Requalification Testing Procedures for Post Maintenance Requalification Testing

5.4.1 If an applicable periodic test procedure exists or if testing requirements are contained in an authorised maintenance working procedure, then that procedure may be used to verify operability of the system or equipment.

5.4.2 If an existing Requalification Testing Procedure is used, the existing procedure must meet the following requirements:

• The existing procedure must include details such as initial conditions and prerequisites, hold points, precautions, personnel qualification requirements, personnel safety requirements, clear acceptance criteria and post-test restoration.

• The existing procedure must prove system operability by testing components and features that were either directly or potentially affected by the subject maintenance activity.

5.4.3 Using Portions of an Existing Requalification Testing Procedures:

5.4.3.1 If applicable sections of existing procedures are to be used, these applicable sections must be specified in the appropriate section of a separate “controlling” Requalification Testing Procedure which must be written and authorised.

5.4.3.2 This is necessary to ensure that the system status, line ups, precautions and prerequisites apply to the testing of the subject maintenance activity at the current point in time.

5.5 Control of Testing

5.5.1 Control of Post Maintenance Requalification Testing and the control of the resulting test documentation will be part of the Work Package.

5.5.2 If more than one group is involved in requalification, Requal Testing will be co-ordinated by the requestor of the work.

5.5.3 If the test cannot be completed immediately after maintenance is performed, the Work Order must be held as an open maintenance Work Order until such time as the component can be tested; or a new notification/work request must be generated and cross referenced to the main work order.



5.5.4 A satisfactory test is one that verifies the ability of a particular component or system to perform its intended function, the original deficiency has been corrected and no new or related problems have been created by the maintenance activity.

5.5.5 If the test is unsatisfactory, deficiencies identified during testing will be documented and corrected by generating a new notification/work request. The root causes of unsatisfactory tests must be analysed so further rework is minimised. Any identified rework must be tracked in accordance with KGA-081.

5.5.6 If rework is performed, test requirements for the rework must be evaluated to determine if testing must be repeated due to the rework.

5.5.7 All testing will be conducted within the requirements of the Plant Safety regulations.

5.5.8 All systems testing will be co-ordinated.

5.5.9 System operability will be assured by system testing.

5.5.10 Maintenance Components listed in SAP as ISIPRM shall be subjected to statutory requalification by Inspection and Test as required by KSA-021.

5.5.11 For further clarification on IST testing requirements, refer to KWR-TP-IST-001.

6.0 ATTACHMENTS

Appendix 1 – Maintenance Activities that should be Considered as Possibly Affecting the Components Performance or Function

Appendix 2 – Minimum Mandatory Requalification Requirements for Repair or Replacement of Piping and Valves by Welding

Appendix 3 – Justification



APPENDIX 1

MAINTENANCE ACTIVITIES THAT SHOULD BE CONSIDERED AS POSSIBLY AFFECTING THE COMPONENTS PERFORMANCE OR FUNCTION

MAINTENANCE ACTIVITY RECOMMENDED TEST

REPAIR/REPLACEMENT OF ELECTRIC MOTOR

(1) Perform insulation resistance checks, winding resistance, polarisation index.

(2) Verify proper direction of rotation and proper phase relationships.

(3) Operate the equipment and verify there are no abnormal noises.

(4) Obtain baseline vibration analysis data.

(5) Measure bearing temperatures.

(6) Measure starting and running current for each phase.

(7) Check oil level.

(8) Check air filter cleanliness.

(9) Measure winding temperatures.

NOTE: Operation/notification must be raised for review of the thermal overload settings (should the motor manufacturer or model number change).

REPAIR/REPLACEMENT OF CIRCUIT BREAKER

(1) Verify adjustment of circuit breaker trips.

(2) Measure phase-to-phase and phase-to-ground insulation resistances.

(3) Measure resistance across each main contact.

(4) Perform auto functional test on the breaker (open and close on required signals).

(5) Measure breaker response time.

(6) Verify operation of auxiliary trip devices and relays.

(7) Perform manual operation.

(8) Breaker parameter check (e.g. breaker operating voltage, current, control power, status lights).



APPENDIX 1 (Continued)



ADJUST PACKING OR REPACK AIR OPERATED OR MOTOR-OPERATED VALVE

(1) Check correct operation of limit and torque switches.

(2) Using air or motor operator, verify full stroke of valve to ensure freedom of movement within time limit.

(3) Stroke timing test to establish a new baseline (if required).

(4) Perform valve diagnostic testing, as required (FRATOL or FLOW SCANNER for AOV, VIPER or SIGAR for MOV).

NOTE: ISTPRM MOVs require a full viper test. Balance of MOVs require Sigar test as minimum.

(5) If necessary, adjust packing to specification.

(6) Seat leakage test if required (only if CIV).

(7) In-service leak check.

(8) If necessary, re-adjust packing friction.

NOTE: If intrusive maintenance refer to KWR-TP-IST-001.






REPAIR INTERNALS OF AIR-OPERATED OR MOTOR-OPERATED VALVE


(2) Using air or motor operator, verify full stroke of valve to ensure freedom of movement.

(3) Stroke timing test to establish a new baseline.

(4) Perform valve calibration and diagnostic testing, as required (FRATOL or FLOW SCANNER for AOV, VIPER, SIGAR or/and TRESOR for MOV).


(5) If necessary, adjust packing friction.

(6) Seat leakage test if required (only if CIV).



REPACK MANUAL VALVE OR ADJUST PACKING

(1) Verify valve stem will move freely without binding.

(2) Check limit switches adjustment (if any).



REPAIR INTERNALS OF NON RETURN VALVES

(1) Seat leakage test (only if CIV or PIV).


NOTE: Just after repair, a requalification test is feasible by using “EDF” OPTIC tool.






MOV ACTUATOR REPAIR OR REPLACEMENT

(1) Perform motor insulation check.

(2) Put valve at intermediate position (50% open) and perform motor rotation direction check.


(4) Using motor operator, verify full stroke of valve to ensure good functioning.

(5) Check automatic resetting of manual control.

(6) Stroke timing test.

(7) Perform valve diagnostic testing, as required (VIPER or SIGAR).


(8) If necessary, adjust packing friction.

(9) Seat leakage test (if required by I&T).

(10) Check EQ requirements i.e., condition of seals and O-rings etc.






AOV ACTUATOR REPAIR OR REPLACEMENT

(1) Check correct operation of limit switches.

(2) Check the supply air pressure.

(3) Using air operator, verify full stroke of valve to ensure good functioning.

(4) Perform valve calibration and diagnostic testing, as required (FRATOL or FLOW SCANNER).

(5) Neutral point adjustment must be performed at this stage, and not disturbed any more.

(6) If necessary, adjust packing friction and actuator force.

(7) Stroke timing test to establish a new baseline (if required).

(8) Functional test from control room.

(9) Seat leakage test (if required by I&T).

SOLENOID VALVE REPAIR OR REPLACEMENT

(1) Check absence of air leak.

(2) Perform local functional test from Control room’s TPL.

(3) Ensure Equipment Qualification (EQ) is met.

(4) Ensure ISTPRM requirement is met.

REPAIR OR REPLACEMENT OF ISOLATION VALVE

(1) Verify valve stem will move freely without binding.

(2) Check limit switches adjustment (if any).

(3) Seat leakage test (only if CIV).


PRESSURE REGULATING VALVE REPAIR OR REPLACEMENT

(1) Perform leak check.

(2) Set point calibration check.

(3) Functional test.

(4) Gauges checked if required.





MAINTENANCE ACTIVITY RECOMMENDED TEST SAFETY VALVE/RELIEF VALVE REPAIRS (1) Bench test or in-place test:

• Relief set point test.

• Re-seat pressure test.

• Bellows testing if applicable.

(2) Valve seat leakage test.

REPAIR OR REPLACEMENT OF PUMPS (1) Inspect base plate/foundation.

(2) Inspect suction filters, oil level, cooling flows.

(3) Perform auto function tests (if any).

(4) Run baseline vibration analysis.

(5) Survey suction and discharge pressures, pump flows, bearing temperatures, packing or seal leakage.

(6) Pump performance test (if required by I&T).






VENTILATION SYSTEM FAN / FILTER UNIT MAINTENANCE (1) Function tests and manual start.

(2) Check bearing temperatures, vibration levels, abnormal noise, air flows.

(3) Measure running current.

(4) Filter inspections and tests.

MANUAL, MOTOR, AND AIR-OPERATED DAMPERS REPAIR OR REPLACEMENT (1) Verify limits are working.

(2) Full-stroke check.

(3) Damper leakage checks.

(4) Automatic function and interlock checks.

(5) Stroke timing check.

(6) Position indication checks.

(7) Seat Leakage (if CIV).

AIR COMPRESSOR REBUILD OR REPAIR

(1) Check for leakage at operating pressures.

(2) Bearing temperature measurement.

(3) Measure baseline vibration levels.

(4) Check for unusual noise.

(5) Check parameters (discharge pressure, cooling flow, oil level, air temperatures).






(AUX) TURBINE MAINTENANCE (1) Auto start functional test.

(2) Turbine (pump) performance check (flow, speed, bearing temperature and vibration amplitude).

(3) Turbine protective feature test i.e. electrical and mechanical over speed test.

(4) Manual start test.

(5) Check oil levels.

(6) Check for fluid leakage at normal system parameters.

(7) Measure baseline vibration data.

(8) Check for rotor grounds.

(9) Grease sliding plates at foundation and pedestal.

(10) Auxiliaries for heating and cooling.

MAINTENANCE OF EMERGENCY DIESEL GENERATOR (EDG) AND RELATED COMPONENTS

(1) Automatic start functional test.

(2) EDG fluid parameter checks (e.g. lube oil level, cooling water temperature and flow, governor control oil system, fuel oil sampling).

(3) EDG protective features auto test (over speed, generator differential, low lube oil pressure, high crank case pressure).

(4) EDG synchronisation and load test.

(5) EDG manual start test.

(6) Diagnostic baseline checks (e.g. vibration cylinder compression).

(7) Voltage regulation and frequency checks.






HEAT EXCHANGER MAINTENANCE (1) Heat exchanger parameter check (temperature, flow, external leakage, etc).

(2) Heat exchanger performance test (heat balance).

(3) Hydrostatic or operational test for tube and tube sheet leakage test.

SYSTEM MAINTENANCE ON PRESSURE RETAINING COMPONENTS (including welding, defect removal, support adjustment).

(1) System flushed.

(2) Perform requalification requirements to ASME Code.

(3) Pressure/hydrostatic check of welded joints.

(4) Integrity check of mechanical joints.

(5) Verify correct fluid chemical parameters.

(6) PSI/ISI requirements (ASME XI).

(7) NDE requirements (ASME B31.1 and ASME III).






REPLACE COMPONENT IN INSTRUMENT LOOP (1) Calibrate replaced component.

(2) Ensure component is installed properly.

(3) Inspect pipe connectors under normal operating or hydrostatic test pressure to verify no leakage.

(4) Verify proper operation of instrument loop or module calibration by:

- comparing with other readings of the same parameter on different instrument channels.

- readings between channels that monitor the same variable and bear a known relationship to each other.

- readings between channels that monitor different variables and bear a known relationship to one another.

(5) Measure a loop response time if there is a time constant associated with instrument response.

(6) Operational check of process.

REPLACE SWITCH DEVICES (PRESSURE, FLOW, TEMPERATURE LEVEL)

(1) Calibrate switch and verify actuation and reset points.

(2) Inspect mechanical joints under normal operating or hydrostatic test pressure to verify no leakage.

(3) Perform a functional test.

REPAIR/ADJUSTMENT OF POWER SUPPLIES

(1) Verify voltage under load. (Scope meter).






INSTRUMENTATION TRANSMITTER CHANNEL MAINTENANCE (1) Channel check.

(2) Channel calibration (all channel components except sensor).

(3) Channel sensor calibration (complete channel).

(4) Trip actuating device operational test.

(5) Compare output against redundant channel indication.

TEMPERATURE CHANNEL MAINTENANCE (1) Channel check.

(2) Channel calibration.

(3) Trip actuating device operational test.

(4) Measure loop response time if there is a time constant.

NUCLEAR INSTRUMENTATION MAINTENANCE (1) Channel check.

(2) Detector calibration (using incore detector system).

(3) Trip activation device operational test.

(4) Incore detector channel calibration (normalisation).

(5) Incore detector drive operational test.

(6) Channel calibration (all channel components except sensor).

NOTE: During channel calibration verify that all auto actuation interlock set points and resets function properly.






RADIATION MONITORS MAINTENANCE (1) Channel check.

(2) Source check.

(3) Auto function test.

(4) Channel calibration.

TRANSFORMER MAINTENANCE (1) Transformer parameter checks (oil temperature, oil level, oil pressure, tap settings, cooling fan status).

(2) Transformer operability test (primary/secondary voltage and current).

(3) Perform oil, gas analysis sampling and monitoring.

(4) Insulation resistance checks.

STATIC INVERTERS REPAIR OR REPLACEMENT (1) Verify voltage and currents.

(2) Inverter load check.

LOAD CENTRE AND DISTRIBUTION PANEL ELECTRICAL MAINTENANCE (1) Verify voltage and load current.

(2) Visual check for fastener tightness, cleanliness.

CONTROL ROD DRIVE MECHANISM (CRDM)

(1) CRDM group step counters (or other position indication) performance maintenance checks.

(2) CRDM rod drop time check, after RPV head removal.

(3) CRDM operability rod speed check.

(4) RPI channel check, functional test and calibration.

(5) Current trace to verify timing and power level supplied to coil.






CRANES AND HOISTS REPAIRS (1) Load test.

(2) Limit switch operability check.

(3) Brake/clutch operability.

BATTERY MAINTENANCE (1) Battery parameter checks (specific gravity, electrolyte level, cell voltage, temperature, battery terminal voltage, linkage, resistances).

(2) Battery Inspection (cells, cell plates, terminals, and connectors are free of corrosion).

(3) Battery service discharge test.

(4) Battery performance discharge test.

TANK/PRESSURE VESSEL REPAIRS OR REPLACEMENT OR SYSTEM MAINTENANCE ON PRESSURE RETAINING COMPONENTS (including welding, defect removal, support adjustment).

(1) Tank/vessel integrity checks for leakage.

(2) Tank parameter checks (proper level, pressure, temperature indications).

(3) Tank content checks (e.g., boron concentration, radiation level, viscosity, particulate contamination, other).

(4) Cleanliness checks.

(5) ASME code requirements, as appropriate.

(6) Condition of internal coatings.

(7) OH & S Act requirements.

(8) PSI/ISI requirements (ASME XI).

(9) NDE requirements (ASME B31.1 and ASME III).



APPENDIX 2

MINIMUM MANDATORY REQUALIFICATION REQUIREMENTS FOR REPAIR OR REPLACEMENT OF PIPING AND VALVES BY WELDING



APPENDIX 3

JUSTIFICATION

Revision 5

1. Updated Appendix 1 to include additional recommended tests.

2. To identify specific requalification testing techniques for various component types.

3. To add seat leakage test (if required by I&T).

4. Additional maintenance activity added and recommended test for non return valves.

Revision 6

1. Updated page 5, section 3.2; to include abbreviation for Availability Related.

2. Updated page 8, paragraph 5.2.4.2; to include Post maintenance/Requal testing requirements must be included in the review.

3. Updated page 9, paragraph 5.5.3; to include additional information.

4. Updated Appendix 1; to include Recommended Test and Replacement in the Heading.

5. Updated BS31.1 with ASME B31.1.

6. Added KSM-014, Rev 6 on References.

7. ISIPRM to be replaced with ISTPRM.

8. Updated Appendix 2 to include note 6 and close out CA 26896.