ML25020A034
| ML25020A034 | |
| Person / Time | |
|---|---|
| Site: | Summer  |
| Issue date: | 01/20/2025 |
| From: | Denise Edwards Dominion Energy South Carolina |
| To: | Office of Nuclear Reactor Regulation, Document Control Desk |
| References | |
| 25-026 Special Report 2025-002 | |
| Download: ML25020A034 (1) | |
Text
Dominion Energy South Carolina, Inc Virgil C. Summer Nuclear Station Bradham Boulevard & Highway 215, Jenkinsville, SC 29065 Mailing Address:
P.O. Box 88, Jenkinsville, SC 29065 DominionEnergy.com January 20, 2025 Document Control Desk Serial No.25-026 U.S. Nuclear Regulatory Commission VCS LIC/JB/Rev 0 Washington, DC 20555 Docket No. 50-395 License No. NPF-12 DOMINION ENERGY SOUTH CAROLINA VIRGIL C. SUMMER NUCLEAR STATION UNIT 1 (VCSNS)
SPECIAL REPORT 2025-002 INOPERABLE RADIATION MONITORING INSTRUMENTATION CHANNEL Dominion Energy South Carolina, Inc. (DESC) hereby submits Special Report 2025-002, pursuant to the requirements of Technical Specification (TS) 6.9.2, as required by Action 30 of TS 3.3.3.1.b, Table 3.3-6, RADIATION MONITORING INSTRUMENTATION, Item 2.d.i.
The Main Plant Vent Radiation Monitor, RM-A13, was declared inoperable on January 7, 2025, due to an instrument trouble alarm. RM-A13 provides extended range backup radiation monitoring to the RM-A3 functions for the Main Plant Vent described in Final Safety Analysis Report (FSAR) Section 9.4.2, Auxiliary and Radwaste Area Ventilation System. RM-A13 is described in FSAR 11.4, Process and Effluent Radiological Monitoring Systems, and its associated tables and figures, as well as Table 12.2-3 and Figure 12.2-2.
Upon declaring RM-A13 inoperable, VCSNS implemented a preplanned alternate method of monitoring in accordance with the requirements of Action 30 of TS Table 3.3-6. Troubleshooting determined that a new detector and amplifier were required.
The new instrumentation has been obtained, assembled, and calibrated. VCSNS is currently in the installation/testing phase of the replacement and expects to restore RM-A13 to OPERABLE status by February 20, 2025.
Should you have any questions, please call Justin Bouknight at (803) 941-9828.
Sincerely, Doug Edwards Director, Nuclear Station Safety & Licensing V.C. Summer Nuclear Station Commitments contained in this letter: None Cc:
G. J. Lindamood - Santee Cooper L. Dudes - NRC Region II NRC Resident Inspector G. Miller - NRC Project Mgr Marsh USA, Inc.