ENS Event | |
|---|---|
20:46 Apr 13, 2009 | |
| Title | Human Performance Error While Troubleshooting a Power Supply |
| Event Description | This telephone notification, instead of a written LER is provided in accordance with 10CFR50.73(a)(1), to report an invalid actuation reportable under 10CFR50.73(a)(2)(iv)(A).
On 4/13/2009, during troubleshooting activities for a control room annunciator power supply problem, a 'D' channel LOCA Level 1 Isolation Logic relay trip occurred when the relay power supply was de-energized and then re-energized. De-energization of the relays caused the 'D' Emergency Diesel Generator (EDG) to auto start, the 'B' Control Room Emergency Filtration System to auto start and the 'D' Safety Auxiliaries Cooling System pump to auto start. The other components of this logic system were properly removed from service and did not actuate. This is classified as an 'invalid' actuation reportable under 50.73(a)(2)(iv)(A). The logic system actuation was due to a human performance error and not the plant conditions. At the time, the plant was in Operational Condition 5 with the reactor cavity flooded and 'A' RHR system in shutdown cooling. In accordance with the existing plant conditions, all actions that should have occurred for this actuation did occur; no other initiations or actuations were noted. This event was entered into the HCGS [Hope Creek Generating Station] corrective action program. There was no radiological release associated with this event. The NRC Senior Resident Inspector has been notified of this report. |
| Where | |
|---|---|
Hope Creek  New Jersey (NRC Region 1) | |
| Reporting | |
| 10 CFR 50.73(a)(1), Submit an LER, Invalid Actuation | |
| Time - Person (Reporting Time:+568.38 h23.683 days <br />3.383 weeks <br />0.779 months <br />) | |
| Opened: | Tom Fowler 13:09 May 7, 2009 |
| NRC Officer: | Mark Abramovitz |
| Last Updated: | May 7, 2009 |
| 45046 - NRC Website
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WEEKMONTHYEARENS 580752025-10-11T10:09:00011 October 2025 10:09:00
[Table view]10 CFR 50.73(a)(1), Submit an LER 60-DAY Report of Invalid Actuation of Containment Isolation Valves ENS 573022024-07-10T13:02:00010 July 2024 13:02:00 10 CFR 50.73(a)(1), Submit an LER 60-DAY Optional Telephonic Notification of Invalid Residual Heat Removal Activation ENS 450462009-04-13T20:46:00013 April 2009 20:46:00 10 CFR 50.73(a)(1), Submit an LER Human Performance Error While Troubleshooting a Power Supply 2025-10-11T10:09:00 | |