ENS 43859
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ENS Event | |
|---|---|
10:13 Dec 21, 2007 | |
| Title | Technical Specification Required Shutdown Due To Both Edg'S Being Declared Inoperable |
| Event Description | This notification is being made to report a Technical Specification required shutdown due to Prairie Island Nuclear Generating Plant (PINGP) Train B Unit 1 emergency diesel generator (D2) being out of service for maintenance and Prairie Island Nuclear Generating Plant (PINGP) Train A Unit 1 emergency diesel generator (D1) being declared inoperable as a result of the Bus 15 load sequencer failure.
On 12/20/07, at approximately 2355 hours0.0273 days <br />0.654 hours <br />0.00389 weeks <br />8.960775e-4 months <br /> (CST), with PINGP Unit 1 in MODE 1, D2 out of service for maintenance activities, SP 1306, D2 Diesel Generator Relay Functional Test, was being performed. This surveillance test requires the performance of SP 1094; Bus 15 Load Sequencer Test which failed during the test. This resulted in the Bus 15 Load Sequencer being declared inoperable per T.S. 3.3.4 and D1 Diesel Generator being declared inoperable. With D2 and D1 EDG's inoperable entered TS 3.8.1.F which requires Unit 1 to be in Mode 3 within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />. Unit 1 shutdown commenced at 0413. Corrective actions for this event are in progress and are being tracked via the corrective action program. The NRC Resident Inspector was notified of this event by the licensee. |
| Where | |
|---|---|
Prairie Island  Minnesota (NRC Region 3) | |
| Reporting | |
| 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown | |
| Time - Person (Reporting Time:+-2.98 h-0.124 days <br />-0.0177 weeks <br />-0.00408 months <br />) | |
| Opened: | Mark Loosbrock 07:14 Dec 21, 2007 |
| NRC Officer: | Joe O'Hara |
| Last Updated: | Dec 21, 2007 |
| 43859 - NRC Website
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Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (35 %) |
WEEKMONTHYEARENS 502152014-06-20T01:35:00020 June 2014 01:35:00
[Table view]10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Technical Specification Required Shutdown ENS 481862012-08-14T08:12:00014 August 2012 08:12:00 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident, 10 CFR 50.72(b)(3)(iv)(A), System Actuation, 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Technical Specification Required Shutdown Based on Both Emergency Diesels Being Declared Inoperable ENS 438592007-12-21T10:13:00021 December 2007 10:13:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Technical Specification Required Shutdown Due to Both Edg'S Being Declared Inoperable ENS 423122006-02-05T19:36:0005 February 2006 19:36:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Required T.S. Shutdown Due to Emergency Diesel Generator Inoperability ENS 416062005-04-16T02:30:00016 April 2005 02:30:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Plant Shutdown Required by Technical Specifications - Inoperable Emergency Diesel Generator ENS 415482005-03-30T13:35:00030 March 2005 13:35:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Technical Specification Shutdown Due to Containment Fan Coil Units Declared Inoperable ENS 412042004-11-18T02:50:00018 November 2004 02:50:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Technical Specification Required Shut Down Due to Both Trains of Containment Cooling System Fan Coil Units Inoperable 2014-06-20T01:35:00 | |
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