ML21308A493
| ML21308A493 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 11/08/2021 |
| From: | Tennessee Valley Authority |
| To: | Perry Buckberg NRC/NRR/DORL/LPL2-2 |
| Buckberg, P. | |
| References | |
| EPID L-2021-LRM-0109 | |
| Download: ML21308A493 (11) | |
Text
License Amendment Request to Revise Sequoyah Operating License to Use Fire PRA and Seismic PRA Models for 10 CFR 50.69 Risk-Informed Categorizations November 8, 2021
Agenda
- Describe upcoming license amendment request (LAR)
Scope of the Request PRA Technical Acceptability
- LAR Schedule
- Summary
- Questions/Comments?
2
Scope of the Request
- LAR revises the existing 10 CFR 50.69 License Condition To allow use of a fire PRA (FPRA) to replace use of the fire Safe Shutdown Equipment List in paragraph (1).
To allow use of a seismic PRA (SPRA) to replace use of a seismic margin analysis to evaluate seismic risk in paragraph (1).
Replaces examples of changes to the categorization process requiring prior NRC approval in paragraph (3).
3
Scope of the Request 4
Scope of the Request 5
PRA Technical Acceptability Fire ASME/ANS RA-Sa-2009 (Part 4), RG 1.200 peer reviewed Appendix X of NEI 05-04, 07-12, and 12-13 finding closure review No open Fire PRA F&Os Note - The FPRA is currently under audit with the Sequoyah TSTF-505 LAR so there may be some opportunities for review synergy.
6
PRA Technical Acceptability (continued)
Seismic ASME/ANS RA-Sb-2013 (Part 5), RG 1.200 peer reviewed Appendix X of NEI 05-04, 07-12, and 12-13 finding closure review No open Seismic PRA F&Os Note - The SPRA is currently under audit with the Sequoyah TSTF-505 LAR so there may be some opportunities for review synergy.
7
Schedule
- Projected submittal in December 2021 with a requested approval within one year
- A 90-day implementation period is proposed 8
Summary
- Sequoyah LAR to allow use of FPRA and SPRA for 10 CFR 50.69 risk-informed categorizations scheduled to be submitted in December 2021 with approval requested in one year
- FPRA and SPRA are technically acceptable for use in 10 CFR 50.69 risk-informed categorizations 9
Questions/
Comments
???
10