ML24142A549

Adv Rx Stakeholders - Risk Metrics Workshop - Rev 2

ML24142A549
Person / Time
Issue date:	05/21/2024
From:	Hanh Phan, Stutzke M Office of Nuclear Reactor Regulation
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Download: ML24142A549 (3)

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Public Workshop on Technology Inclusive Risk Metrics for Advanced Reactors NRC Working Group on Technology Inclusive Risk Metrics Office of Nuclear Regulatory Research (RES)

• Jeffery Wood

• Matt Humberstone

• Gerardo Martinez-Guridi Office of Nuclear Reactor Regulation (NRR)

• Hanh Phan

• Marty Stutzke Periodic Advanced Reactor Stakeholder Meeting May 23, 2024 1

NRC Considering Needs for Non-LWR Risk Metrics and Reliability Data 2

In 1990, the Commission established three risk metrics for new reactors and associated quantitative goals:

Core Damage Frequency (CDF) < 1x10-4/year - A measure of overall safety performance in prevention of severe accidents Large Release Frequency (LRF) < 1x10-6/year - A measure of prevention of significant offsite consequences Conditional Containment Failure Probability (CCFP) < 0.1 - A measure of the capability of design to mitigate a severe accident Traditional risk metrics, e.g., CDF, have been used effectively in NRCs risk-informed decision-making processes May not be applicable to all advanced reactor designs SRM SECY-23-0021 provides direction on applicant proposed risk metrics The staff should revise draft 10 C.F.R. 53.220 to specify that applicants must propose a comprehensive plant risk metric (or set of metrics)

Need to consider alternative risk metrics that:

Are applicable to Non-LWR designs Support NRC licensing and regulatory processes

Public Workshop on Risk Metrics and Reliability Data for Non-LWRs

• Summarize NRC staffs ongoing efforts on risk metrics and supporting reliability data

• Gather input from stakeholders

• Consider how risk metrics can be applied to:

• Licensing

• Oversight

• License amendment requests

• Other risk-informed regulatory processes

• Contact if interested in presenting your thoughts on risk metrics

• jeffery.wood@nrc.gov

• Planning to schedule workshop, tentative mid-July 2024 3