ML20181A393
| ML20181A393 | |
| Person / Time | |
|---|---|
| Issue date: | 06/30/2020 |
| From: | Gregory Bowman NRC/NRR/DRA |
| To: | Office of Nuclear Reactor Regulation |
| Schwab A | |
| Shared Package | |
| ML20181A423 | List: |
| References | |
| Download: ML20181A393 (10) | |
Text
Risk-Informed Licensing Reviews Greg Bowman Deputy Director, Division of Risk Assessment Office of Nuclear Reactor Regulation Risk-Informed Steering Committee Meeting June 30, 2020
Lessons Learned from Risk-Informed Licensing Submittals
Status
- Focus has been on reviews of TSTF-505 and the 10 CFR 50.69 license amendment requests
- 10 amendments for TSTF-505 have been issued
- 3 recently issued
- 7 under active review
- 16 amendments for 10 CFR 50.69 issued
- 2 recently issued
- 5 under active review 3
Staff Review Depends on the Application 4b, Risk-Informed Completion Times Greater 50.69 reliance after NFPA-805, Risk-Informed Fire on PRA TSTF-505 Acceptability review Protection Required scope, More should level of detail, flexibility reduce technical for review 50.69 SSC Categorization robustness, and licensee effort plant More representation 5b, Risk-Informed complex Surveillance Frequencies staff review Risk-Informed Inservice Inspection 4
Factors That Impact Risk-Informed Licensing Review Time Review Time (h)
Extensive open F&Os Many Deviations Large PRA Scope (Ext. Hazards)
ILRT One-Time Changes Use of F&O Closure Process 50.69 No Deviations RI-ISI TSTF-425 5 TSTF-505 Limited Scope (IE PRA Only)
Positive Trends
- Significant improvement in PRA Acceptability for applications
- Use of F&O Closure process reduced F&O review effort
- 50.69 industry LAR review boards
- Concurrent reviews
- Excellent audit support, including recent remote audits
- Continued dialogue
- Internal staff efforts to improve review efficiency 6
LIC-206, Revision 1:
Integrated Risk-Informed Decision-Making (RIDM) for Licensing Reviews
Motivation and Objectives SRM SECY 19-00361 Culture Change:
- Integrate Technical M1705112 Reviews Reviewers RIDM Action Plan3 1 ML19183A408 2 ML17177A397 3 ML18317A117 8
Key Elements of LIC-206, Revision 1 Guidance for technical Technical Reviewer Focused reviewers on constructing Guidance risk arguments Simplified flowcharts and Clarified and Simplified checklist Process Implementation Sample safety evaluation language Integrate risk insights to Enhanced Use of Risk Insights reach regulatory decisions Based on Recent Experience Adjust scope and level of effort 9
Next Steps
- Rollout NRC
- Implementation
- Lessons Learned and Improvements
- Consider providing risk insights, if External they strengthen the case