ENS 43473
ENS Event | |
|---|---|
06:14 Jul 4, 2007 | |
| Title | Unusual Event Declared Due to a Loss of Control Room Annunciators |
| Event Description | Failure of main control board annunciator panels A, B, C, and D occurred at 0158 hours0.00183 days <br />0.0439 hours <br />2.612434e-4 weeks <br />6.0119e-5 months <br />. At that time the control room had just commenced a load reduction to repair the turbine control valve #3. The load reduction was terminated at the time of the annunciator panel failure. Reactor power is 98.5%.
Unusual Event EAL is 7.3.1 RCS Pressure is 2235 psig RCS Temperature is 573 degrees The plant is currently stable and holding power. The Plant Process Computer remains operable monitoring at power parameters. The licensee has commenced an investigation to determine the cause of failure related to the power supply for the affected annunciator panels. The licensee informed both State and local agencies and the NRC Resident Inspector.
The licensee exited the Unusual Event at 1542 EDT on 07/04/07. All repairs have been completed, successful post maintenance test is complete, and all annunciator panels have been restored to operable condition. A blown fuse was discovered on the AA panel flasher card. The flasher cards for the AA panel and the A panel have been replaced. Two separate annunciator cards in the D panel have also been replaced. The licensee informed both State and local agencies and the NRC Resident Inspector. Notified R1DO (Rogge), NRREO (Lubinski), IRD (Cruz), R1 RA (Collins), NRR ET (Dyer), DHS (Frost), and FEMA (Dwight). |
| Where | |
|---|---|
Ginna  New York (NRC Region 1) | |
| Reporting | |
| Emergency class: | Unusual Event |
| 10 CFR 50.72(a) (1) (i), Emergency Class Declaration | |
| Time - Person (Reporting Time:+-3.53 h-0.147 days <br />-0.021 weeks <br />-0.00484 months <br />) | |
| Opened: | Kevin Mclaughlin 02:42 Jul 4, 2007 |
| NRC Officer: | Steve Sandin |
| Last Updated: | Jul 4, 2007 |
| 43473 - NRC Website
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Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (98 %) |
| After | Power Operation (98 %) |
WEEKMONTHYEARENS 448302009-02-05T19:13:0005 February 2009 19:13:00
[Table view]10 CFR 50.72(a)(1)(i), Emergency Class Declaration Unusual Event Declared Due to Loss of Control Room Annunciators ENS 444462008-08-28T17:48:00028 August 2008 17:48:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Unusual Event Declared Due to Loss of Communications with Offsite Agencies ENS 439442008-01-30T17:30:00030 January 2008 17:30:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Unusual Event Declared Due to Loss of Offsite Notification Capabilities ENS 434732007-07-04T06:14:0004 July 2007 06:14:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Unusual Event Declared Due to a Loss of Control Room Annunciators ENS 405232004-02-16T07:25:00016 February 2004 07:25:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Unusual Event Declared Due to Service Air Compressor Controller Exploding 2009-02-05T19:13:00 | |