ML25111A209
| ML25111A209 | |
| Person / Time | |
|---|---|
| Site: | Quad Cities  |
| Issue date: | 04/24/2025 |
| From: | Robert Kuntz Plant Licensing Branch III |
| To: | Rhoades D Constellation Energy Generation, Constellation Nuclear |
| Kuntz R | |
| References | |
| EPID L-2024-LLA-0149 | |
| Download: ML25111A209 (1) | |
Text
April 24, 2025 Mr. David P. Rhoades Senior Vice President Constellation Energy Generation, LLC President and Chief Nuclear Officer Constellation Nuclear 4300 Winfield Road Warrenville, IL 60555
SUBJECT:
QUAD CITIES NUCLEAR POWER STATION, UNITS 1 AND 2 - REGULATORY AUDIT REPORT REGARDING LICENSE AMENDMENT REQUEST RELATED TO STANDBY GAS TREATMENT SYSTEM (EPID L-2024-LLA-0149)
Dear Mr. Rhoades:
By letter dated November 4, 2024, Constellation Energy Generation, LLC (Constellation) submitted a license amendment request (LAR)for Quad Cities Nuclear Power Station, Units 1 and 2, Renewed Facility Operating License Nos. DPR-29 and DPR-30, respectively. The proposed LAR would extend the Completion Time for Technical Specifications (TS) 3.6.4.3, Standby Gas Treatment (SGT) System, Required Action D.1 on a one-time basis to support repair of the SGT common discharge exhaust line. Specifically, the proposed change extends the Required Action D.1 Completion Time from 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> to 14 days.
The U.S. Nuclear Regulatory Commissions (NRCs) Office of Nuclear Reactor Regulation staff conducted an audit of the information related to support its review of the amendment request.
The audit plan is available in ADAMS at Accession No. ML25035A060.
The audit was conducted virtually through conference calls and the use of an online portal. The NRC staff held multiple virtual meetings during the week of February 10, 2025, with the licensee to discuss the license amendment request and the analysis to support the request.
The purpose of the audit was to gain understanding, to verify information, and to identify information that will require docketing to support the proposed licensing action. The enclosure to this letter provides a report of the NRC staffs audit.
D. Rhoades If you have any questions, please contact me by telephone at (301) 415-3733 or by e-mail at Robert.Kuntz@nrc.gov.
Sincerely,
/RA/
Robert Kuntz, Senior Project Manager Plant Licensing Branch III Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-254 and 50-265
Enclosure:
Audit Report cc: Listserv
Enclosure REGULATORY AUDIT REPORT TO SUPPORT THE REVIEW OF LICENSE AMENDMENT REQUEST TO EXTEND STANDBY GAS TREATMENT SYSTEM ALLOWED OUTAGE TIME CONSTELLATION ENERGY, LLC QUAD CITIES NUCLEAR POWER STATION, UNITS 1 AND 2 DOCKET NOS. 50-254 AND 50-265
1.0 BACKGROUND
By letter dated November 4, 2024, Constellation Energy Generation, LLC (Constellation, the licensee) submitted a license amendment request (LAR)for Quad Cities Nuclear Power Station, Units 1 and 2, Renewed Facility Operating License Nos. DPR-29 and DPR-30, respectively. The proposed LAR would extend the Completion Time for Technical Specifications (TS) 3.6.4.3, Standby Gas Treatment (SGT) System, Required Action D.1 on a one-time basis to support repair of the SGT common discharge exhaust line. Specifically, the proposed change extends the Required Action D.1 Completion Time from 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> to 14 days.
The U.S. Nuclear Regulatory Commission (NRC) staff conducted a regulatory audit in accordance with the Office of Nuclear Reactor Regulation (NRR) Office Instruction LIC-111, Regulatory Audits (Agencywide Documents Access and Management System Accession No. ML24309A281), to support its review of this LAR. LIC-111 states that a regulatory audit is a planned, licensed or regulation-related activity, that includes the examination of primarily 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.
2.0 SCOPE AND PURPOSE The audit was held from February 7 to March 14, 2025. The purpose of the audit was to help the NRC staff better understand the analyses through interaction with the licensees staff and to help focus the NRC staffs request for additional information on those questions where docketed information is needed to complete the review.
3.0 AUDIT TEAM The following NRC staff members participated in the audit:
Robert Kuntz, Senior Project Manager Derek Scully, Safety and Plant Systems Engineer David Coy, Reactor Systems Engineer Joshua Wilson, Reactor Systems Engineer Thinh Dinh, Fire Protection Engineer Sean Meighan, Reactor Scientist (Radiation Consequences) 4.0 AUDIT
SUMMARY
During discussion with Constellation, the NRC staff noted discussed the following items:
Dose calculation input and results. The staff discussed the assumptions made in the RADTRAD analysis and the basis for these assumptions.
The design of the temporary modifications. The staff requested additional details on the temporary modifications.
TS 3.6.4.3, Action A for one train of SGT out of service would require transition to Mode 3 during the planned maintenance period. Constellation indicated that they would review the TSs and determine if any additional TS modification would be required to permit the extended outage of the SGT system.
The mitigation actions that will be taken while the SGT system is out of service. The staff sought clarity on how the mitigative actions would be assured while the SGT system is out of service.
5.0 DOCUMENTS REVIEWED The following documents were reviewed by the NRC staff during the audit:
Procedure QCTP 0820-08, Leakage Reduction, Revision 12 Work Order 4684190, Unit 1 Integrated Primary Containment Leak Rate Test Work Order 1956786, Unit 2 Integrated Primary Containment Leak Rate Test 6.0 AUDIT CONCLUSION There were no regulatory decisions made during the audit. There were no open items needing further clarification and no deviation from the audit plan.
Date: April 24, 2025
ML25111A209 NRR-106 OFFICE NRR/DORL/LPL3/PM NRR/DORL/LPL3/LA NRR/DSS/SCPB/BC NRR/DSS/STSB/BC NAME RKuntz SRohrer MValentin SMehta DATE 4/21/2025 4/22/2025 4/22/2025 4/22/2025 OFFICE NRR/DRA/ARCB/BC NRR/DRA/APLB/BC NRR/DORL/LPL3/(A)BC NRR/DORL/LPL3/PM NAME KHsueh EDavidson IBerrios (SWall for)
RKuntz DATE 4/22/2025 4/23/2025 4/24/2025 4/24/2025