ML052230058
| ML052230058 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 03/09/2005 |
| From: | M'Lita Carr Southern California Edison Co |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| Download: ML052230058 (6) | |
Text
1 Life In a Risk-Informed Environment 2005 NRC-Regulatory Information Conference - Session G4 Risk Informed Presented by Michelle Carr Southern California Edison March 9, 2005
2 Introduction Many changes have occurred in the past 15-20 years with respect to use of PRA Some in the industry would say that the biggest changes are yet to come Its undeniable: Industry and NRC are moving forward in increasing the use of risk information and improving the quality of PRAs To understand the potential impacts of these efforts, it is important to know how we got here to anticipate where were going
3 Historical Perspective on PRA Use WASH-1400, IPE, IPEEE, Safety/Risk Monitor Development Risk insights gained although PRA Scope limited and PRA Quality not rigorously assessed PRA applications Proof-of-Concept efforts to risk-inform regulation, Owners Group Joint Applications (e.g., TS AOTs)
Individual Utility Applications Industry/NRC initiatives PRA Quality improvements, scope expansion, participation in risk-informed applications were at discretion of the utility
4 The Rising Bar: Peer Reviews, Standards Industry Sponsored Peer Reviews initiated Regulatory review of PRA applications require information on Peer Review Findings Risk information necessary for Maintenance Rule (a)(4) and Significance Determination Process ASME and ANS Standards Developed Higher requirements, broader scope than prior industry check lists Costs/Resources needed to meet Capability Category II being evaluated NRC/Industry working to determine PRA Quality Requirements for participation in voluntary and regulator-initiated applications
5 Where We Go From Here To ensure continued success of risk-informed application participation, more work is required Regulatory Guide 1.200 and other PRA Quality Standard pilots/trial usage PRA Quality and Scope Requirements Determination recognizing the variation in quality and capabilities of existing utility and NRC PRAs Implementation of Phased Approach Investment/Resources to improve PRAs to meet quality requirements will have to committed
6 Conclusion It is recognized that the more PRAs are relied upon to make decisions, the higher quality they should be PRA Quality and Scope will have to improve across the board - but with time Investment costs to upgrade PRAs to meet higher requirements may be perceived as prohibitive - benefits of making the investment must be effectively communicated and ultimately realized