ENS 44240
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ENS Event | |
|---|---|
13:30 May 25, 2008 | |
| Title | Inverter Fuse Failure |
| Event Description | At 1835 on 5/24/08 CD482 inverter main power fuse failed. This inverter powers various vital ECCS channel 'C' analog instrumentation (including 'C' channel EDG start circuitry). The inverter transferred to the alternate AC power supply as designed with no abnormal plant response or transient. The main power fuse was replaced and attempts were made to place the inverter section back in service and return the inverter to the normal power supply. Logic card checks were performed as part of the normal restoration process prior to transferring to the inverter normal output. These checks could not be completed satisfactorily and indicate that there is an abnormal condition in the inverter section. The inverter, while on alternate AC, is not operable per technical specifications [TS] due to the loss of alternate AC on a LOOP/LOCA, which would prevent the 'C' EDG from starting. Additional safety related equipment that is unavailable include the 'D' Station Service Water Pump for a scheduled maintenance window. All other safety equipment is operable and functioned as required. No personnel were injured. Unit shutdown commenced at 0930 on 5/25/08 in accordance with TS 3.8.3.1. The unit is required to be in hot shutdown by 1435. This four-hour report is bring made in accordance with 10 CFR 50.72(b)(2)(i).
The licensee notified the NRC Resident Inspector. The licensee will notify a local government agency.
The inverter logic power supply has been replaced, and the inverter has been tested satisfactorily. The inverter has been declared operable, and the licensee exited the technical specification required shutdown at 1217. Power ascension is in progress. The licensee informed the NRC Resident Inspector, and the Lower Alloways Creek Township. Notified R1DO(Gray) |
| Where | |
|---|---|
Hope Creek  New Jersey (NRC Region 1) | |
| Reporting | |
| 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown | |
| Time - Person (Reporting Time:+-3.67 h-0.153 days <br />-0.0218 weeks <br />-0.00503 months <br />) | |
| Opened: | Tom Fowler 09:50 May 25, 2008 |
| NRC Officer: | Pete Snyder |
| Last Updated: | May 25, 2008 |
| 44240 - NRC Website
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Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (91 %) |
| After | Power Operation (91 %) |
WEEKMONTHYEARENS 575302025-02-01T01:15:0001 February 2025 01:15:00
[Table view]10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Shutdown Required by Technical Specifications ENS 564952023-04-30T06:00:00030 April 2023 06:00:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Technical Specification Required Shutdown ENS 442402008-05-25T13:30:00025 May 2008 13:30:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Inverter Fuse Failure ENS 419562005-08-28T15:00:00028 August 2005 15:00:00 10 CFR 50.72(b)(3)(v)(A), Loss of Safety Function - Shutdown the Reactor, 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Technical Specification Required Shutdown Due to Inoperable Suppression Chamber Vacuum Breaker ENS 408762004-07-16T14:00:00016 July 2004 14:00:00 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident, 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Technical Specification Shutdown/Loss of Single Safety Function ENS 405392004-02-23T06:52:00023 February 2004 06:52:00 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident, 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Technical Specification Required Shutdown Started Due to Grass Intrusion 2025-02-01T01:15:00 | |
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