ENS Event | |
|---|---|
11:16 Dec 14, 2005 | |
| Title | Invalid System Actuation of Emergency Core Cooling System Components |
| Event Description | This report is being made in accordance with 10 CFR 50.73(a)(1), which states in part, 'in the case of an invalid actuation reported under 10 CFR 50.73(a)(2)(iv), other than the reactor protection system (RPS) when the reactor is critical, the licensee may, at its option, provide a telephone notification to the NRC Operations Center within 60 days after discovery of the event instead of submitting a written LER.
On December 14, 2005, at 0616 hours0.00713 days <br />0.171 hours <br />0.00102 weeks <br />2.34388e-4 months <br /> EST, a failure of the left channel load sequencer resulted in an invalid actuation of components associated with the left channel design basis accident (DBA) sequencer. Components in the emergency core cooling system were among the components actuated. Therefore, this event constitutes a partial actuation of the emergency core cooling system, which is reportable under 10 CFR 50.73(a)(2)(iv)(A). All components actuated by the event functioned satisfactorily as would be expected for this equipment failure and operating status of the plant at the time of the event. The licensee notified the NRC Resident Inspector. |
| Where | |
|---|---|
Palisades  Michigan (NRC Region 3) | |
| Reporting | |
| 10 CFR 50.73(a)(1), Submit an LER, Invalid Actuation | |
| Time - Person (Reporting Time:+1323.5 h55.146 days <br />7.878 weeks <br />1.813 months <br />) | |
| Opened: | Barb Dotson 14:46 Feb 7, 2006 |
| NRC Officer: | Bill Huffman |
| Last Updated: | Feb 7, 2006 |
| 42317 - NRC Website
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Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (85 %) |
WEEKMONTHYEARENS 499602014-02-08T04:19:0008 February 2014 04:19:00
[Table view]10 CFR 50.73(a)(1), Submit an LER Invalid Actuation of a Containment Isolation Signal ENS 499592014-02-06T15:43:0006 February 2014 15:43:00 10 CFR 50.73(a)(1), Submit an LER Invalid Actuation of a Containment Isolation Signal ENS 423172005-12-14T11:16:00014 December 2005 11:16:00 10 CFR 50.73(a)(1), Submit an LER Invalid System Actuation of Emergency Core Cooling System Components ENS 412632004-11-04T14:17:0004 November 2004 14:17:00 10 CFR 50.73(a)(1), Submit an LER Invalid System Actuation - Safety Injection 2014-02-08T04:19:00 | |