ML26006A046
| ML26006A046 | |
| Person / Time | |
|---|---|
| Site: | Vogtle  |
| Issue date: | 01/13/2026 |
| From: | John Lamb Plant Licensing Branch II |
| To: | Coleman J Southern Nuclear Operating Co |
| References | |
| EPID L-2025-LLA-0080 | |
| Download: ML26006A046 (0) | |
Text
January 13, 2026 Jamie M. Coleman Regulatory Affairs Director Southern Nuclear Operating Co., Inc.
3535 Colonnade Parkway Birmingham, AL 35243
SUBJECT:
VOGTLE ELECTRIC GENERATING PLANT, UNITS 1 AND 2 - SUPPLEMENT TO REGULATORY AUDIT IN SUPPORT OF REVIEW OF THE LICENSE AMENDMENT REQUEST REGARDING ALTERNATE SOURCE TERM USING REGULATORY GUIDE 1.183 REVISION 1 (EPID L-2025-LLA-0080)
Dear Ms. Coleman:
By letter dated May 12, 2025 (Agencywide Documents and Access Management System (ADAMS) Accession No. ML25132A313), Southern Nuclear Operating Company (SNC, the licensee) submitted a license amendment request (LAR) for the Vogtle Electric Generating Plant (Vogtle), Units 1 and 2, respectively. The proposed LAR would revise the Vogtle, Unit 1 and 2, licensing basis to support a full scope application of an Alternate Source Term methodology following the guidance of Regulatory Guide 1.183, Revision 1 (ML23082A305).
The Nuclear Regulatory Commission (NRC) staff identified the need for a regulatory audit to examine the SNCs non-docketed information with the intent to gain understanding, to verify information, or to identify information that will require docketing to support the basis of the licensing or regulatory decision. By letter dated July 11, 2025 (ML25190A545), as supplemented by email dated September 22, 2025 (ML25265A159), the NRC staff issued the audit plan.
The NRC staff has identified the need for the additional information attached to gain understanding, to verify information, or to identify information that will require docketing to support the basis of the licensing or regulatory decision.
If you have any questions, please contact me at (301) 415-3100 or by email at John.Lamb@nrc.gov.
Sincerely,
/RA John G. Lamb, Senior Project Manager Plant Licensing Branch II-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-424 and 50-425
Enclosure:
Supplement Audit Questions cc: Listserv
Enclosure SUPPLEMENT TO REGULATORY AUDIT PLAN BY THE OFFICE OF NUCLEAR REACTOR REGULATION TO SUPPORT THE REVIEW OF THE LICENSE AMENDMENT REQUEST REGARDING ALTERNATE SOURCE TERM USING RG 1.183 REVISION 1 SOUTHERN NUCLEAR OPERATING COMPANY VOGTLE ELECTRIC GENERATING PLANT, UNITS 1 AND 2 DOCKET NOS. 50-424, AND 50-425
1.0 BACKGROUND
By letter dated May 12, 2025 (Agencywide Documents and Access Management System (ADAMS) Accession No. ML25132A313), Southern Nuclear Operating Company (SNC, the licensee) submitted a license amendment request (LAR) for the Vogtle Electric Generating Plant (Vogtle), Units 1 and 2, respectively. The proposed LAR would revise the Vogtle, Unit 1 and 2, licensing basis to support a full scope application of an Alternate Source Term methodology following the guidance of Regulatory Guide (RG) 1.183 Revision 1.
The Nuclear Regulatory Commission (NRC) staff identified the need for a regulatory audit to examine the SNCs non-docketed information with the intent to gain understanding, to verify information, or to identify information that will require docketing to support the basis of the licensing or regulatory decision. By letter dated July 11, 2025 (ML25190A545), as supplemented by email dated September 22, 2025 (ML25265A159), the NRC staff issued the audit plan.
The NRC staff has identified the need for the additional information attached to gain understanding, to verify information, or to identify information that will require docketing to support the basis of the licensing or regulatory decision.
2.0 SUPPLEMENT AUDIT QUESTIONS/DISCUSSIONS Item #
Audit Question/Discussion 1
(ARCB)
Will SNC send the updated SGTR Radtrad files?
2 (ARCB)
The last line of Page 14 of LAR Table 3.4, Gap + early in-vessel correlation has a multiplier value of 0.86 and it appears as if this value should be 0.0860 as provided in table 36 of NUREG/CR-6189.
3 (ARCB)
Can SNC provide a spent fuel pool (SFP) surface area? This is used in FHA Phase 2 calcs. This value is not provided in the LAR. (The NRC staff is open to receiving information in a manner that best suits the licensee, e.g., reading room, updated LAR.
Item #
Audit Question/Discussion
- via eConcurrence NRR-106 OFFICE NRR/DORL/LPL2-1/PM*
NRR/DORL/LPL2-1/LA*
NRR/DRA/ARCB/BC (A)* NRR/DORL/LPL2-1/BC*
NAME JLamb KZeleznock SMeighan MMarkley DATE 1/6/2026 1/7/2026 1/12/2026 1/13/2026 OFFICE NRR/DORL/LPL2-1/PM*
NAME JLamb DATE 1/13/2026