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NRC’s Component Design Bases Inspections

NRC’s Component Design Bases Inspections. Donald P. Norkin U.S. Nuclear Regulatory Commission June 11-14, 2006 Richmond, VA. History. April 29,2004 - SECY 04-0071 - Proposed Pilot 2004/2005 - Temporary Instruction 2515/158 Vermont Yankee V.C. Summer Kewaunee Diablo Canyon

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NRC’s Component Design Bases Inspections

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  1. NRC’s Component Design Bases Inspections Donald P. Norkin U.S. Nuclear Regulatory Commission June 11-14, 2006Richmond, VA

  2. History • April 29,2004 - SECY 04-0071 - Proposed Pilot • 2004/2005 - Temporary Instruction 2515/158 • Vermont Yankee • V.C. Summer • Kewaunee • Diablo Canyon • May 1, 2005 - SECY 05-0118 - Pilot Results • January 2006 - Implement Component Design Bases Inspections

  3. Component Design Bases Inspection (CDBI) • 15-20 Risk Significant and Low Design Margin Components • 3-5 Relatively High Risk Operator Actions • 4-6 Operating Experience Issues • Replaces Safety System Design and Performance Capability (SSDPC) Inspection • Biennial - All Plants Will Receive CDBI Either in 2006 or 2007 • Will Develop Criteria for Determining Scope of Design/Engineering Inspections After 2007

  4. Significant Changes from SSDPC Inspections • Components vs. Systems, Which Impacts Licensee Document Retrieval • Margin Review for Sample Selection • Operating Experience • Enhanced Inspection Preparation and Sample Selection • Additional Week for Site Inspection • Increase Use of Contractors Having Hands-On Design Experience

  5. Staffing • Team Leader • Two Design Specialists (Typically Mechanical and Electrical Contractors) • Two Regional Inspectors (Operations and Engineering) • Part Time Support from Senior Reactor Analyst and Resident Inspector for Sample Selection • Trainee (If Possible)

  6. Schedule • Week 1 On-Site Info Gathering • Week 2 In-Office Prep/Sample Selection • Week 3 Sample Selection/On-Site Inspection • Week 4 In-Office Inspection • Week 5 On-Site Inspection • Week 6 or 7 On-Site Inspection/Exit Meeting

  7. Insights From Pilot Inspections • Pilot CDBIs Had More Findings Per Inspection Hour Than SSDPCs • More White Findings Than for SSDPCs • Most Findings Involved Original Design, Corrective Actions, and Operating Procedure

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