ML24218A192

NRC Presentation for 7-30-24 Public Meeting RG 1.247 Finalization Plan

ML24218A192
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Issue date:	07/30/2024
From:	Office of Nuclear Reactor Regulation
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Download: ML24218A192 (1)

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Regulator y Guide 1.247

Acceptability of PRA Results for Non-Light Water Reactor Risk-Informed Activities

July 30, 2024 Publication of the Trial Use RG 1.247

Federal Register notice announcing public availability of the trial use RG 1.247 was published on March 24, 2022 (87 FR 16770)

Staff conducted a post-promulgation comment period ending on May 23, 2022

A 2-year trial use period followed the comment period starting on May 24, 2022, and concluded on May 23, 2024 Trial Use Period for RG 1.247

The purpose of the 2-year trial use period was to help gain additional implementation experience to better inform draft and final staff positions.

Based on available information at the time, it was expected the trial use RG 1.247 might be used by prospective, near -term, non-LWR applicants.

No comments were received on the trial use RG 1.247 during the 2-year trial use period.

Path Forward for RG 1.247

Staff to finalize the staff positions in RG 1.247 following the conclusion of the trial use period and culminating in the publication of a final staff position in RG 1.247, Revision 0.

The trial use RG 1.247 to be withdrawn following publication of RG 1.247, Revision 0

Finalization will occur over an extended period to allow consideration of near-te rm use of the trial use RG 1.247 in non -LWR licensing activities.

Comments to be re-evaluated (post promulgation)

- The HLR-HR-E and HR-E4 are not consistent with the current PRA State of practice

- EOC language does not maintain consistency with the LWR PRA standard.

- Definition of feasible

- The definition of feasible provided may be appropriate for the HRA requirements within the standard, HLR-DA-D also uses the word feasible in a manner not consistent with the proposed definition

- Use of feasibility assessment

- Addition of feasibility studies Not appropriate, Redundant to existing requirements Finalization Schedule for RG 1.247

May 2024 - Staff start development of the proposed draft regulatory guide (DG)

Comment resolution, periodic meetings to gain more insights from RG users March 2025 - Staff publish DG, as informed by:

Periodic public meetings to provide and discuss development status Consideration of near-term use of trial use RG 1.247 April to May 2025 - Public comment period on DG Mid-calendar year (CY) 2025 to mid -CY2026:

Resolution of public comments Internal and ACRS reviews Mid-CY2026 - Publication of RG 1.247, Revision 0