Semantic search
| Start date | Reporting criterion | Title | Event description | System | LER | |
|---|---|---|---|---|---|---|
| ENS 44830 | 5 February 2009 19:13:00 | 10 CFR 50.72(a)(1)(i), Emergency Class Declaration | Unusual Event Declared Due to Loss of Control Room Annunciators | At 1413 EST Ginna Station declared an Unusual Event due to the Loss of Main Control Board Annunciators E, F, G and H. There was ongoing maintenance at the time, however, no specific cause for the loss has been identified. The licensee confirmed that they have redundant indication available to monitor plant parameters. The unit is currently stable and operating at 100% power. The licensee informed state and local agencies and the NRC Resident Inspector.
Based on testing, troubleshooting, and restoration of power to the Main Control Board Annunciators, Ginna Station exited the Unusual Event at 0435 hours on 2/6/09. The licensee notified the NRC Resident Inspector. Notified RDO (Gray), NRR EO (Hiland), IRD MOC (Grant), DHS (Kettles), and FEMA(LaForty). | ||
| ENS 44446 | 28 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 | At 1348 EST the licensee declared an Unusual Event and entered EAL 7.3.2 due to the loss of the ability to communicate with offsite organizations. The loss of communications was due to a maintenance worker opening the wrong breaker. This caused the loss of all land based phone lines in the control room, the satellite phones and ERDS. The power was restored and the EAL was exited at 1414. The licensee notified the NRC Resident Inspector. * * * UPDATE FROM DAN DEAN TO PETE SNYDER AT 1930 ON 8/28/08 * * * Ginna Station is updating the Unusual Event classification and declaration made at 1348 hours on August 28th, 2008. Information received following termination of the event at 1414 hours, shows that two telephones were available in the Control Room during the entire event. At the time of the classification, the Shift Manager did not have this information. The licensee notified the NRC Resident Inspector. | ||
| ENS 43944 | 30 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 | At 1230 hrs. EST, the licensee discovered that offsite notification capabilities were lost. Upon discovery, they declared a Notification Of Unusual Event (NOUE) under EAL 7.3.2. At the time of discovery, the licensee was in their adverse weather procedure due to winds exceeding 55 mph on site. The high winds caused a loss of electrical power to non-vital power block facilities, including the site PBX (Private Branch Exchange). The backup diesel generator for PBX power initially failed to start but was manually started at 1300 hrs. and PBX functions were restored. No other vital equipment was adversely affected by the loss of non-vital power. The licensee will remain in the NOUE until normal power is restored to the power block. The licensee has notified the NRC Resident Inspector.
The licensee terminated the Unusual Event at 2015 EST on 1/30/08 based on restoration of normal offsite power to the PBX. In addition, the backup diesel power supply to the PBX has been verified to be functional and available. The licensee has also stationed a spare backup diesel if needed. All phone lines have been tested and confirmed to be back in service with the exception to the RECS line (dedicated line to State and County Officials). Backup commercial lines to the State and County Officials are available. The licensee will be notifying the NRC Resident Inspector. R1DO (Perry), FEMA and DHS notified. | ||
| ENS 43473 | 4 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 | Failure of main control board annunciator panels A, B, C, and D occurred at 0158 hours. 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). | ||
| ENS 40523 | 16 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 | At 0225 EST on 02/16/04, the licensee declared an Unusual Event due to the instrument air/service air system service air compressor controller exploding due to an electrical fault. Instrument air compressor alarm #H-16 actuated. The backup 'A' and 'B' instrument air compressors auto started. The licensee immediately electrically isolated the service air compressor controller. The licensee declared the Unusual Event in accordance with EAL 8.3.2, an explosion or detection of explosion affecting plant equipment or structures within plant protected area boundaries. No other plant equipment or structures were affected. The plant is stable at 100% power. There is no indication of tampering or foreign objects inside the controller. The licensee is investigating the cause. The licensee notified the NRC Resident Inspector and State and Local Officials. The licensee does not plan to issue a press release.
At 0420 EST on 02/16/04, the licensee terminated the Unusual Event based on the service air compressor controller being electrically isolated and removed from service and the surrounding area secured. The licensee is continuing to investigate the cause of the electrical fault. Plant security personnel determined in accordance with their security tampering procedure that this event is clearly not security related. The licensee notified the NRC Resident Inspector and State and Local Officials of the termination of the Unusual Event. Notified R1DO James Trapp, NRR EO John Hannon, DIRO Susan Frant, TAS Hahn, FEMA Ken Sweetser, and DHS John Frost. |