ENS 56345
ENS Event | |
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11:04 Jan 1, 2023 | |
Title | 60-DAY Optional Telephonic Notification of Invalid Actuation of Auxiliary Feedwater Pump |
Event Description | The following information was provided by the licensee via email:
This 60-day optional telephone notification is being made in lieu of a Licensee Event Report as allowed by 10 CFR 50.73(a)(1). This notification is made pursuant to 10 CFR 50.73(a)(2)(iv)(A) for an invalid system actuation. On January 1, 2023, at approximately 0604 EST, static inverter KXA failed causing a loss of power to shared 120-VAC auxiliary control panel board KXA. Operations entered the appropriate procedures to assist in diagnosing and responding to the event. As expected, the solenoid valves in the instrument lines to steam supply valves 1SA-48ABC and 1SA-49AB deenergized, causing 1SA-48ABC and 1SA-49AB to open and admit steam to the unit 1 turbine driven auxiliary feedwater pump (TDAFWP). Operations reduced turbine load to maintain reactor power less than 100 percent. At approximately 0641 EST, power was restored to the KXA panelboard and the TDAFWP was secured. All systems functioned as required. Actuation of the TDAFWP was not initiated in response to actual plant conditions or parameters satisfying the requirements for initiation of the system nor was the actuation due to an intentional manual initiation. Therefore, this actuation is considered an invalid actuation. The NRC Resident Inspector has been notified. |
Where | |
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Mcguire North Carolina (NRC Region 2) | |
Reporting | |
10 CFR 50.73(a)(1), Submit an LER, Invalid Actuation | |
Time - Person (Reporting Time:+939.82 h39.159 days <br />5.594 weeks <br />1.287 months <br />) | |
Opened: | Ryan Severns 14:53 Feb 9, 2023 |
NRC Officer: | Adam Koziol |
Last Updated: | Feb 9, 2023 |
56345 - NRC Website
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Unit 1 | |
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Reactor critical | Critical |
Scram | No |
Before | Power Operation (100 %) |
After | Power Operation (100 %) |
WEEKMONTHYEARENS 563452023-01-01T11:04:0001 January 2023 11:04:00
[Table view]10 CFR 50.73(a)(1), Submit an LER 60-DAY Optional Telephonic Notification of Invalid Actuation of Auxiliary Feedwater Pump ENS 507202014-11-16T04:55:00016 November 2014 04:55:00 10 CFR 50.73(a)(1), Submit an LER Invalid Actuation of 1A Emergency Diesel Generator (Edg) ENS 485502012-12-02T16:42:0002 December 2012 16:42:00 10 CFR 50.73(a)(1), Submit an LER 60-Day Report - Invalid Auxiliary Feedwater and Nuclear Service Water Pump Actuation ENS 484432012-09-30T03:37:00030 September 2012 03:37:00 10 CFR 50.73(a)(1), Submit an LER Inadvertent Alignment of Nuclear Service Water to Standby Nuclear Service Water Pond ENS 459132010-04-16T09:21:00016 April 2010 09:21:00 10 CFR 50.73(a)(1), Submit an LER Inadvertent Steam Admission to Afw Turbine ENS 450062009-02-23T08:06:00023 February 2009 08:06:00 10 CFR 50.73(a)(1), Submit an LER Inadvertent Actuation of Turbine Auxiliary Feedwater Pump ENS 416352005-04-09T14:39:0009 April 2005 14:39:00 10 CFR 50.73(a)(1), Submit an LER Invalid Specified System Actuation ENS 411512004-10-20T00:20:00020 October 2004 00:20:00 10 CFR 50.73(a)(1), Submit an LER Invalid Turbine Driven Auxiliary Feedwater Actuation 2023-01-01T11:04:00 | |