Westinghouse Owners Group Risk-Informed Repair and Replacement

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Westinghouse Owners Group Risk-Informed Repair
and Replacement Implementation of 10 CFR
50.69Twelfth International Conference on
Nuclear EngineeringArlington, Virginia, USA 26
April 2004 Jason BrownWestinghouse Electric
Company LLC

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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?

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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

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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
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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

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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

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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

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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

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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

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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