ML25323A449
| ML25323A449 | |
| Person / Time | |
|---|---|
| Site: | North Anna  |
| Issue date: | 11/19/2025 |
| From: | Joel Jenkins Dominion Energy Virginia, Virginia Electric & Power Co (VEPCO) |
| To: | Office of Nuclear Reactor Regulation, Document Control Desk |
| References | |
| 25-282 | |
| Download: ML25323A449 (1) | |
Text
Dominion Energy Virginia North Anna Power Station 1022 Haley Drive, Mineral, VA 23117 Dominion Energy.com November 19, 2025 U.S. Nuclear Regulatory Commission Attention: Document Control Desk Washington, D.C. 20555
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Dominion
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Energy Serial No.
NAPS:
Docket No.
License No.25-282 RAP 50-338 NPF-4 VIRGINIA ELECTRIC AND POWER COMPANY (DOMINION ENERGY VIRGINIA)
NORTH ANNA POWER STATION UNIT 1 POST ACCIDENT MONITORING (PAM) REPORT On September 7, 2025, with Unit 1 in Mode 3 entering a refueling outage, the Channel I Source Range and Wide Range Ex-Core Neutron Monitors, 01-NM-NFl-190A1 and B1, were found indicating more than 1 decade higher than Channel Ill.
The cause of the inoperable neutron monitor is due to failures of a card and a power supply. The associated repairs will occur when parts become available. Technical Specification (TS) 3.3.3 Condition A requires restoration of the neutron monitor to operable within thirty days. If the neutron monitor is not returned to service within thirty days, a Post Accident Monitoring Report is required in accordance with TS 5.6.6. This letter provides the required report including our plan and schedule for restoring the neutron monitor to service.
Continued operation with the neutron monitor inoperable is permitted because there is another train of wide range and source range neutron monitoring that is operable.
Additionally, the normal power range nuclear instruments (PRNI) are operable to provide power indication during normal plant operation.
This report has been reviewed and approved by the Facility Safety Review Committee.
If you have any questions or require additional information, please contact Mr. Matt Hayes (540) 894-2100.
Sincerely, James Jenkins Site Vice President
Serial No.25-282 Docket No. 50-338 PAM Report Page 2 of 2 Commitments made in this letter: Repair and restoration to operability for 01-NM-NFl-190A 1 and B 1 at the nearest maintenance opportunity.
cc:
J. Lara - NRG Region II Administrator G.E. Miller - NRG Senior Project Manager