ML23158A185

22 - NRC - Risk-Informed Materials Assessment

ML23158A185
Person / Time
Issue date:	06/15/2023
From:	Dan Widrevitz NRC/NRR/DNRL/NPHP, NRC/NRR/DNRL/NVIB
To:
References
Download: ML23158A185 (1)

Text

Risk-Informed Materials Assessment Project DAN WIDREVITZ JUNE 15, 2023

2 Risk-Informed Materials Assessment Project (RIMA)

NRC/NRR staff seek to develop guidance on the use of Risk-Informed Decision Making (RIDM) in the materials engineering context.

Goal:

Regulatory guidance providing framework for submitting and reviewing applications with RIDM aspects while remaining (on the NRC side) maximally within the purview of DNRL materials engineering review.

3 RIMA Challenge NRC has observed increase in RIDM and RIDM-like applications.

Diversity of approach both in applications and review require substantial resources.

Key NRC challenges:

• Existing NRC RIDM guidance focused on use of PRA

• RIDM guidance for passive component integrity not available

• Handling of uncertainties within RIDM approach lacks discipline specific guidance

4 RIMA Ambitions Staff seek to produce regulatory guidance based roughly on approach in RG 1.245, Preparing Probabilistic Fracture Mechanics Submittals.

Guidance would provide key aspects to include in high-quality submittals as well as the interaction between these key aspects as they may relate to NRC review decisions.

Guidance will support potential to grade submittal, in terms of scope and depth of review, based on subject specific considerations

5 RIMA Status NRC staff have developed internal draft concepts and are iterating on draft.

Draft core topics:

1a. Addressing defense-in-depth 1b. Addressing safety margin 1c. Addressing risk impacts

2. Addressing performance monitoring

3. Topic specific appendices (such as Binomial approach)

Public participation in project is planned in future stages- we welcome your input and feedback!

6 QUESTIONS