ML23045A285
| ML23045A285 | |
| Person / Time | |
|---|---|
| Issue date: | 03/14/2023 |
| From: | Jeffery Wood Office of Nuclear Regulatory Research |
| To: | |
| References | |
| Download: ML23045A285 (1) | |
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Advancing the Infrastructure for Using PRA in Decision-Making Technical Session T5 Jeffery Wood Senior Reliability and Risk Analyst Office of Nuclear Regulatory Research 1
Agenda NRCs Framework for Using PRAs and Risk in Decision Making Maintaining and Enhancing Infrastructure and Guidance for Use of PRAs PRA Tools to Support Risk Insights 2
PRA Acceptability PRA Standards Peer Review Process Regulatory Guides PRA Methods and References RIDM Achieved Building Confidence in PRA results PRA Models and Tools Building a Foundation for Risk-Informed Decision Making 3
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Peer Review National Consensus Standards NRC Staff Position ASME/ANS Joint Committee on Nuclear Risk Management Endorsement through NRC Regulatory Guides Reduce need for in-depth review Independent peer review process Endorsement of peer review guidance NRCs Framework for Achieving PRA Acceptability 4
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RIDM Endorsement of PRA standards to support:
New and advanced LWRs Consistent with 10 CFR Part 52 requirements All hazards and all operating modes Design-stage PRA Established staff positions in existing Regulatory Guides Endorse 2022 Level 1 / LERF PRA Standard ASME/ANS RA-S-1.1-2022 Endorse Level 2 PRA Standard (anticipated in 2023)
Endorse Advanced LWR PRA Standard Endorse Low Power and Shutdown PRA Standard New and adv. LWR applications Vision for Next Revisions to Regulatory Guide 1.200 5
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- Regulatory Guide 1.247 issued for trial use
- Endorses Non-LWR PRA standard (ASME/ANS RA-S-1.4-2021)
- PRA Standard scope:
- Initiating event through release consequences
- All modes
- Design phase Providing the basis for Non-LWR RIDM RIDM for Non-LWRs Review Guidance Non-LWR PRA Methods Treatment of Uncertainties 6
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Search PRA standard requirements Compare revisions Compare Regulatory Guide positions Track NRC staff notes and workflow IDENTIFY all important significant components aspects contributing to plant risk.
Requirement text compare Publicly available database version under development (limited to publicly available documents)
Developing Modern Tools to Support Efficient Use of PRA 7
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SPAR models
- Providing risk insights for reactor oversight, generic safety issues, special studies, inspection samples
- Representing as-built, as-operated condition by updating and benchmarking with licensee PRA models PRA Tools Supporting RIDM
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Making risk information accessible Easy-to-use, interactive dashboard Communicating risk insights Supporting Be riskSMART framework Component Importance Measures CDF contribution by Initiating Event Comparison of CDF by Hazard Category 9
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NRC has developed a framework for establishing PRA acceptability that provides a basis for RIDM activities.
NRC develops and maintains PRA tools to incorporate risk insights to our work and RIDM activities.
Benchmarking against licensee PRA results helps to ensure up-to-date risk insights.
NRC is continuing to develop guidance and tools that will support using PRA results and RIDM activities for new and advanced non-LWR and LWR applications.
Key Messages 10