ENS 53083
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ENS Event | |
---|---|
14:10 Oct 6, 2017 | |
Title | Invalid Specified System Actuation |
Event Description | On October 6, 2017 at 0910 CDT hours, with Unit 1 in Mode 1 (Power Operation), the 1A Diesel Generator Cooling Water Pump (DGCWP) automatically started. The cause was the misoperation of the 1B/C RHR [Residual Heat Removal] Room Cooler Fan (1VY03C) control switch, which was placed in the start position instead of the intended pull-to-lock position. The start of the 1VY03C fan resulted in the automatic actuation of the 1A DGCWP. This system actuation is reportable in accordance with 10CFR50.73(a)(2)(iv)(A). The invalid actuation was not part of a pre-planned sequence during testing or reactor operation.
The 1A DGCWP, an emergency service water system that does not normally run and that serves as an ultimate heat sink, responded satisfactorily. This call is being made in accordance with 10CFR50.73(a)(1), which states that in the case of an invalid actuation reported under 10CFR50.73(a)(2)(iv), other than an actuation of the reactor protection system when the reactor is critical, the licensee may provide a telephone notification to the NRC Operations Center within 60 days after discovery of the event instead of submitting a written Licensee Event Report. The licensee notified the NRC Resident Inspector. |
Where | |
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Lasalle Illinois (NRC Region 3) | |
Reporting | |
10 CFR 50.73(a)(1), Submit an LER, Invalid Actuation | |
Time - Person (Reporting Time:+1103.2 h45.967 days <br />6.567 weeks <br />1.511 months <br />) | |
Opened: | Matthew Miller 14:22 Nov 21, 2017 |
NRC Officer: | David Aird |
Last Updated: | Nov 21, 2017 |
53083 - NRC Website
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Unit 1 | |
---|---|
Reactor critical | Critical |
Scram | No |
Before | Power Operation (100 %) |
After | Power Operation (100 %) |
WEEKMONTHYEARENS 552402021-03-10T13:15:00010 March 2021 13:15:00
[Table view]10 CFR 50.73(a)(1), Submit an LER 60-Day Optional Telephonic Notification of an Invalid Specified System Actuation ENS 530832017-10-06T14:10:0006 October 2017 14:10:00 10 CFR 50.73(a)(1), Submit an LER Invalid Specified System Actuation ENS 522272016-07-11T09:30:00011 July 2016 09:30:00 10 CFR 50.73(a)(1), Submit an LER Invalid Actuation of Division 1 Primary Containment Isolation Logic Due to a Blown Fuse ENS 491742013-05-22T16:34:00022 May 2013 16:34:00 10 CFR 50.73(a)(1), Submit an LER 60 Day Optional Telephonic Notification of Invalid Division 1 Containment Isolation Due to Motor Generator Trip ENS 462202010-07-26T23:19:00026 July 2010 23:19:00 10 CFR 50.73(a)(1), Submit an LER 60-Day Telephonic Notification in Lieu of a Written Licensee Event Report of Invalid Actuation ENS 458782010-03-05T10:39:0005 March 2010 10:39:00 10 CFR 50.73(a)(1), Submit an LER Invalid Isolation Signal Caused Msiv'S to Close ENS 433582007-03-15T06:02:00015 March 2007 06:02:00 10 CFR 50.73(a)(1), Submit an LER Invalid Eccs and System Actuations ENS 433332007-03-03T13:14:0003 March 2007 13:14:00 10 CFR 50.73(a)(1), Submit an LER Invalid Eccs Actuation During Refueling Outage ENS 427372006-06-04T09:19:0004 June 2006 09:19:00 10 CFR 50.73(a)(1), Submit an LER Invalid Rps Bus 'B' and Division 2 Pcis Actuations ENS 425262006-03-04T10:12:0004 March 2006 10:12:00 10 CFR 50.73(a)(1), Submit an LER Invalid Emergency Diesel Generator Start ENS 415602005-02-07T13:56:0007 February 2005 13:56:00 10 CFR 50.73(a)(1), Submit an LER Invalid Specified System Actuation 2021-03-10T13:15:00 | |
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