Westinghouse Owners Group Risk-Informed Repair and Replacement – Implementation of 10 CFR 50.69
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Westinghouse Owners Group Risk-Informed Repair and Replacement – Implementation of 10 CFR 50.69 Twelfth International Conference on Nuclear Engineering Arlington, Virginia, USA26 April 2004 Jason Brown Westinghouse Electric Company LLC. Presentation Outline. What is 10 CFR 50.69?

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Presentation outline

Westinghouse Owners Group Risk-Informed Repair and Replacement – Implementation of 10 CFR 50.69Twelfth International Conference on Nuclear EngineeringArlington, Virginia, USA26 April 2004 Jason BrownWestinghouse Electric Company LLC


Presentation outline

Presentation Outline

  • What is 10 CFR 50.69?

  • What is the Westinghouse Owners Group §50.69 Program?

  • What are the program benefits?

  • What are the lessons learned?


Proposed 10 cfr 50 69 rule

Proposed 10 CFR 50.69 Rule

  • Title 10 of The Code of Federal Regulations, Part 50, Section 69

  • Permits licensees to reduce special treatment requirements for safety related components that are determined to be low safety significant

  • Provides high level requirements for categorization process (details on next slide)

  • Provides high level treatment requirements for low safety significant, safety-related components

    • Design control, procurement, corrective action, and maintenance, inspection, testing, and surveillance

  • Requires final categorization to be approved by plant-appointed Integrated Decision-making Panel


Nrc proposed 50 69 risk informed safety classifications risc

NRC Proposed §50.69 Risk-Informed Safety Classifications (RISC)

Safety-Related

Nonsafety-Related

Robust Categorization Process

Safety

Significant

RISC-1

RISC-2

Not Categorized

as Safety

Significant

RISC-3

RISC-4


Overview of categorization process

Overview of Categorization Process

  • Robust categorization process outlined in NEI 00-04, Final Draft, “10 CFR 50.69 SSC Categorization Guideline”, April 2004

    • PRA screening for risk insights

    • Fire/Seismic/Shutdown/Other External Events

    • Defense in Depth

    • Safety Margins

    • Other plant operations related deterministic considerations

  • Categorization results verified by plant personnel as part of Integrated Decision-making Panel


Westinghouse owners group wog 50 69 program

Westinghouse Owners Group (WOG) §50.69 Program

  • Use the industry guidance and proposed §50.69 rule to categorize two systems for two WOG pilot plants (Wolf Creek and Surry Unit 1)

  • Support NRC review of WOG Topical Report for each pilot plant related to the use of the new §50.69 process

  • Develop high level treatment requirements related to the use of the new §50.69 process

  • Develop WOG submittal template and implementation guidance for use by WOG members in plant-specific applications of §50.69

  • Support industry activities to influence §50.69 rule language development, regulatory guidance and standard review plans


Status of wog 50 69 program

Status of WOG §50.69 Program

  • First Wolf Creek Integrated Decision-making Panel (IDP) – December 2003

  • Second Wolf Creek IDP – May 2004

  • Surry IDP – July 2004

  • Wolf Creek Regulatory Submittal – June 2004

  • Surry Regulatory Submittal – October 2004


Benefits of wog 50 69 program

Benefits of WOG §50.69 Program

  • Resolution of generic regulatory issues related to the use of NEI 00-04 and ASME Code Case N-660

    • October 2003 version of NEI 00-04 revised and resubmitted to NRC in April 2004 based on trial use at one plant

    • ASME Code Case N-660 being revised based on trial use at one plant

  • Development of guidance for defining treatment changes

    • Equipment qualification, seismic, etc.

  • Definition of required submittal content for using §50.69

  • Development of an implementation guide (including training) to assure consistency for WOG member implementation of §50.69


Benefits of wog 50 69 program continued

Benefits of WOG §50.69 Program, continued

  • Demonstration of the plant benefits associated with implementation of §50.69

    • Procurement, repair & replacement, inservice inspection/testing, equipment qualification, quality assurance, Maintenance Rule, etc.

  • Generic cost-benefit performed for 2002 WOG §50.69 demonstration program - ~$1.5 Million annual savings per plant

  • Generic cost-benefit validated at another plant – similar findings


Lessons learned from wog 50 69 program

Lessons Learned from WOG §50.69 Program

  • Importance of a robust categorization process, culminating with the Integrated Decision-making Panel

    • Documentation, guidance, and training

  • Expectations and requirements of NRC submittal

  • Encouraged by NRC comment resolution as reported at February meeting with the Advisory Committee on Reactor Safeguards

  • Good reason to proceed with pilot plant effort

    • Cost-benefit of §50.69 implementation remains intact

    • Still more benefits to be achieved through continuation of WOG program


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