ENS 46144
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ENS Event | |
|---|---|
18:52 Aug 3, 2010 | |
| Title | Unit 1 Entered a Tech Spec Required Shutdown After Declaring Edg 102 Inoperable |
| Event Description | Nine Mile Point Unit 1 entered a Technical Specification (TS) Required Shutdown due to unplanned inoperability of Emergency Diesel Generator [EDG] 102 during planned maintenance on opposite division Liquid Poison pump 12. In accordance with TS 3.0.1, Limiting Condition for Operation [LCO] Applicability and TS 3.1.2, Liquid Poison System, normal orderly shutdown commenced at 1551 [EDT] which was within one hour of declaring Emergency Diesel Generator 102 inoperable.
The unplanned inoperability of EDG 102 was caused by the failure of its lube oil circulating pump due to thermal overload. The licensee is pursuing restoration of EDG 102 and the Liquid Poison pump 12 in order to exit the LCO Action Statement. The licensee informed the NRC Resident Inspector.
The Nine Mile Point Unit 1 TS required shutdown was suspended at 1929 [EDT] upon restoration of Emergency Diesel Generator (EDG) 102 to operable. With operability of EDG 102 restored, Liquid Poison Pump 11 was also made operable. Accordingly, the TS shutdown action for an inoperable liquid poison system was exited. The lowest power level reached was 92.5% of the licensed thermal power limit. Power ascension is in progress, and [the licensee expects] to be at rated power by 2200 [EDT]. The licensee notified the NRC Resident Inspector. Notified the R1DO (DeFrancisco) |
| Where | |
|---|---|
Nine Mile Point  New York (NRC Region 1) | |
| Reporting | |
| 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown | |
| Time - Person (Reporting Time:+-1.45 h-0.0604 days <br />-0.00863 weeks <br />-0.00199 months <br />) | |
| Opened: | Mark Greer 17:25 Aug 3, 2010 |
| NRC Officer: | Steve Sandin |
| Last Updated: | Aug 3, 2010 |
| 46144 - NRC Website
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Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (97 %) |
WEEKMONTHYEARENS 496772013-12-26T18:01:00026 December 2013 18:01:00
[Table view]10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Technical Specification Required Shutdown Due to Blown Fuse ENS 485902012-12-13T21:30:00013 December 2012 21:30:00 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 Due to Primary Containment System Declared Inoperable ENS 475142011-12-09T15:46:0009 December 2011 15:46:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Unidentified Rcs Leakage Greater than 2 Gpm Increase within 24 Hours ENS 471292011-08-06T07:22:0006 August 2011 07:22:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration, 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Unusual Event and Plant Shutdown Due to Drywell Unidentified Leakage Greater than 10 Gpm ENS 461442010-08-03T18:52:0003 August 2010 18:52:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Unit 1 Entered a Tech Spec Required Shutdown After Declaring Edg 102 Inoperable ENS 446352008-11-07T01:27:0007 November 2008 01:27:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Tech Spec Required Shutdown Required Due to Failed Surveillance Test ENS 432232007-03-08T19:50:0008 March 2007 19:50:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Technical Specification Shutdown Due to a Degraded Seal in the "a" Reactor Recirculation Pump ENS 426302006-06-11T05:26:00011 June 2006 05:26:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Technical Specification Shutdown Due to High Rcs Drywell Leakage ENS 409192004-08-03T23:30:0003 August 2004 23:30:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Plant Shutdown Initiated Due to Inoperable Emergency Ups Inverter ENS 407192004-05-02T06:17:0002 May 2004 06:17:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(b)(3)(iv)(A), System Actuation, 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Manual Scram Due to Rising Torus Temperature Due to Stuck Open Erv ENS 405882004-03-15T15:30:00015 March 2004 15:30:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Shutdown Required by Technical Specifications Due to Inoperable Isolation Instrumentation ENS 404362004-01-10T18:00:00010 January 2004 18:00:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Ts Required Shutdown at Nmp1 Due to Inoperable Msiv ENS 402322003-10-08T14:30:0008 October 2003 14:30:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Technical Specification Required Shutdown Due to Primary Coolant Boundary Leakage 2013-12-26T18:01:00 | |
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