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 | |
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
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