ENS 55263
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ENS Event | |
|---|---|
04:37 Mar 23, 2021 | |
| Title | 60-Day Optional Telephonic Notification for an Invalid Diesel Generator Initiation |
| Event Description | This 60-day telephone notification is being made per the reporting requirements specified by 10 CFR 50.73(a)(2)(iv)(A) and 10 CFR 50.73(a)(1) to describe an invalid specific system actuation. On March 23, 2021, during the performance of the Division 1 ECCS [(Emergency Core Cooling System)] Integrated Test, the Division 1 Diesel Generator (DG) unexpectedly started. While performing the local lockout testing, per the procedure, a step was performed that initiated the unexpected DG start. The following step was to verify the diesel did NOT start. It was later determined that this was a procedural deficiency. The DG started and ran as designed. The DG did not tie to the safety bus as no undervoltage condition was detected.
This event is considered an invalid system actuation reportable under 10 CFR 50.73(a)(2)(iv)(A). The actuation was not initiated in response to actual plant conditions or parameters and was not a manual initiation. Therefore, this notification is provided via a 60-day optional phone call in accordance with 10 CFR 50.73(a)(1) instead of submitting a written Licensee Event Report. All affected systems functioned as expected in response to the actuation. The DG was shut down in accordance with plant procedures and the testing procedure corrected. There was no impact on the health and safety of the public or plant personnel. The NRC Resident Inspector has been notified. |
| Where | |
|---|---|
Perry  Ohio (NRC Region 3) | |
| Reporting | |
| 10 CFR 50.73(a)(1), Submit an LER, Invalid Actuation | |
| Time - Person (Reporting Time:+1348.45 h56.185 days <br />8.026 weeks <br />1.847 months <br />) | |
| Opened: | Sean Fahnestock 09:04 May 18, 2021 |
| NRC Officer: | Lloyd Desotell |
| Last Updated: | May 18, 2021 |
| 55263 - NRC Website
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Unit 1 | |
|---|---|
| Reactor critical | Not Critical |
| Scram | No |
| Before | Cold Shutdown (0 %) |
| After | Cold Shutdown (0 %) |
WEEKMONTHYEARENS 552632021-03-23T04:37:00023 March 2021 04:37:00
[Table view]10 CFR 50.73(a)(1), Submit an LER 60-Day Optional Telephonic Notification for an Invalid Diesel Generator Initiation ENS 510842015-03-26T20:29:00026 March 2015 20:29:00 10 CFR 50.73(a)(1), Submit an LER 60-Day Optional Telephonic Notification for an Invalid Primary Containment and Drywell Isolation Valve Actuation ENS 504502014-07-26T17:13:00026 July 2014 17:13:00 10 CFR 50.73(a)(1), Submit an LER Electrical Transient Causes an Invalid System Actuation ENS 483192012-07-24T00:57:00024 July 2012 00:57:00 10 CFR 50.73(a)(1), Submit an LER Invalid System Actuations ENS 434522007-05-03T05:58:0003 May 2007 05:58:00 10 CFR 50.73(a)(1), Submit an LER Invalid System Actuation ENS 405982004-02-22T15:16:00022 February 2004 15:16:00 10 CFR 50.73(a)(1), Submit an LER Partial Rps Actuation During Testing at Perry ENS 404692003-11-29T20:26:00029 November 2003 20:26:00 10 CFR 50.73(a)(1), Submit an LER Invalid System Actuation ENS 401262003-08-02T01:18:0002 August 2003 01:18:00 10 CFR 50.73(a)(1), Submit an LER Invalid Actuation of Division 2 Balance-Of-Power Inboard Isolation Valves 2021-03-23T04:37:00 | |
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