ML21064A417

PFHA-2021-1A-1 of 4 (Furstenau, NRC) Intro-FINAL-SlideOnly

ML21064A417
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Issue date:	02/25/2021
From:	Raymond Furstenau NRC/RES/DRA/FRB
To:
Aird, Tom - 301 415-2442
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Download: ML21064A417 (11)

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1 Workshop Opening Remarks Ray Furstenau Director, Office of Nuclear Regulatory Research 6th Annual NRC PFHA Research Workshop Via Webinar February 22-25, 2021

Workshop Participation Snapshot 2

~300 Participants

~100 NRC

~200 External

NRC Participation Drill Down 3

~40 Nuclear Reactor Regulation

~15 Nuclear Material Safety and Safeguards

~15 Regions

~20 Research

~15 Other

Industry Participation Drill Down 4

~85 Industry

Non-NRC Government Participation Drill Down 5

~65 Government (Non-NRC)

International Participation Drill Down 6

~35 International

Academic Participation Drill Down 7

~25 Academia

PFHA Research Objective

• NRCs Risk-Informed Regulatory Policy has been translated into practice in some external hazard areas (e.g., seismic, high winds)

• Flood hazard assessment is a significant gap

- Deterministic approaches do not quantify uncertainties

• PFHA research is aimed at filling this gap

- Quantify uncertainties

- Support risk-informed decisionmaking 8

Addressing Current and Future Needs Recent experience has highlighted importance of risk-informing flood hazard assessments

- Flooding events at or near NPPs in U.S. and abroad

- Post-Fukushima flood hazard reevaluations and integrated assessments Ongoing and new risk-informed initiatives

- FLEX, Risk-informed categorization and treatment of SSCs, Risk-informing inspections and other licensing and oversight activities Recent and upcoming revisions to industry consensus standards point to increased role for probabilistic hazard assessment Readiness for licensing new and advanced reactor designs 9

NRC Phased Approach

• Phase 1: Technical basis

- Technical basis research essentially complete

• Climate

• Precipitation

• Riverine flooding

• Storm surge

• Reliability of flood protection and mitigation

• Compound flooding

• Modeling frameworks

• Phase 2: Pilot Studies

• 3 Pilot studies initiated in FY20

• Regulatory Guidance 10

Current PFHA Research Focus In FY21 NRC/RES continues to focus on PFHA Pilot Studies to:

- Fine-tune scenario-specific issues

- Demonstrate development of hazard curves for multiple flooding mechanism and spectrum of impacts

- Inform development of guidance 3 PFHA Pilots

- Site-scale Flooding (Local Intense Precipitation)

- Riverine Flooding

- Coastal Flooding Discussion with User Offices on scope and format of guidance

- PFHA workshops provide valued input from a broad cross-section of partners and stakeholders