L-25-171, Special Report: Inoperable Post Accident Monitoring Instrumentation
| ML25247A031 | |
| Person / Time | |
|---|---|
| Site: | Perry  |
| Issue date: | 09/03/2025 |
| From: | Tony Brown Vistra Operations Company |
| To: | Office of Nuclear Reactor Regulation, Document Control Desk |
| References | |
| L-25-171 | |
| Download: ML25247A031 (1) | |
Text
September 3, 2025 L-25-171 ATTN: Document Control Desk U.S. Nuclear Regulatory Commission Washington, D.C. 20555-0001
SUBJECT:
Perry Nuclear Power Plant Docket No. 50-440, License No. NPF-58 Perry Nuclear Power Plant Terry Brown Site Vice President 10 Center Road Perry, Ohio 44081 419-321-7676 330-730-3590 ( cell) 10 CFR 50.4 Special Report: Inoperable Post Accident Monitoring Instrumentation In accordance with the provisions of Perry Nuclear Power Plant Technical Specification 3.3.3.1, the enclosed Special Report is being submitted to notify the Nuclear Regulatory Commission of an inoperable channel of Post Accident Monitoring Instrumentation. The report documents Post Accident Monitoring equipment that had been out-of-service for greater than 30 days.
There are no regulatory commitments contained in this letter. If there are any questions or if additional information is required, please contact Mr. Anthony Kledzik, Manager-Regulatory Compliance, at (440) 280-6188.
- iJerely,
/2!:ry
Enclosure:
Inoperable Post Accident Monitoring Instrumentation cc:
NRC Project Manager NRC Regional Administrator NRC Resident Inspector
Special Report Inoperable Post Accident Monitoring Instrumentation L-25-171 Enclosure Page 1 of 1 The primary purpose of the Perry Nuclear Power Plant (PNPP) post-accident monitoring instrumentation is to display plant variables required to be monitored by the control room operators during accident scenarios. The primary containmenUdrywell area gross gamma radiation monitors, which comprise a portion of the post-accident radiation monitoring system instruments, are provided to monitor for potential significant radiation releases, and to aid in the assessment of releases for determining site emergency action levels. PNPP has two multi-channel area radiation monitors, each consisting of one high range containment detector and one high range drywell detector.
One drywell channel of the primary containmenUdrywell area gross gamma radiation monitors had been inoperable for greater than the allowed outage time permitted by Technical Specifications (TS). In accordance with TS 3.3.3.1 Action 8.1, if the required channel is not restored within 30 days, a special report is required to be submitted within an additional 14 days detailing the cause of the inoperable channel and proposed restorative actions.
TS 3.3.3.1 Action A.1 was entered on July 28, 2025, at 0923, for a surveillance procedure. During the surveillance procedure on the post-accident drywell radiation monitor, it was found to have an inoperative second digit on the display and the monitor remained inoperable. The display board was replaced, and the drywell post-accident radiation monitor was declared operable on August 27, 2025, at 1204.
The channel was not restored within the 30-day requirement; therefore, this special report is being submitted in accordance with TS 3.3.3.1, Action 8.1.