ML24218A192
| ML24218A192 | |
| Person / Time | |
|---|---|
| Issue date: | 07/30/2024 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| References | |
| Download: ML24218A192 (1) | |
Text
Regulatory Guide 1.247 July 30, 2024 Acceptability of PRA Results for Non-Light Water Reactor Risk-Informed Activities
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The trial use RG 1.247 to be withdrawn following publication of RG 1.247, Revision 0 Finalization will occur over an extended period to allow consideration of near-term use of the trial use RG 1.247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