ENS 41518
ENS Event | |
|---|---|
12:42 Mar 24, 2005 | |
| Title | Unusual Event Declared Due to Loss of Control Room Annunciators |
| Event Description | The licensee reported an Unusual Event following a loss of all control room overhead annunciators (per EAL 8.2.1). The cause of the loss of the overhead annunciators is still being investigated. The licensee states that the plant is stable with no other problems. This licensee plans to remain at 100% power while troubleshooting the condition.
The licensee has notified the NRC Resident Inspector, State , and local government agencies. The NRC Resident Inspector in the control room provided some additional information related to this event (0820 EST). The condition was discovered during a routine lamp check of the annunciators. When the lamps failed to clear after the check, the licensee entered its abnormal operating procedure and discovered the problem. The licensee does have compensatory means of monitoring the alarms through a control room CRT display as well as a printer that registers alarms. The resident stated that the extent of the annunciator loss is unclear.
The licensee terminated from the Unusual Event at 10:50 EST. The licensee stated that the annunciator system has been repaired and reset and verified to be operable. No information on the specific nature of the problem or repairs affected to restore the system to operable was provided. The NRC Resident Inspector, State, and local authorities have been notified by the licensee. R1DO (Rogge), NRR (Benner), IRD (Crlenjak), FEMA (DUNKET), and DHS (EVANS) were notified.
UNUSUAL EVENT RETRACTED The licensee faxed the following update: Upon further investigation and testing it was determined that the annunciator system was always functional; redundant capability of the annunciators was unavailable. Plant equipment information was always available to Operators during this time period (07:42 to present), and as such the emergency condition did not exist and the Unusual Event is retracted. The NRC Resident Inspector, State, and local authorities will be notified by the licensee. Notified R1 (Rogge), IRD (Crlenjak), NRR (Berkow), FEMA (Dunket), and DHS (Evans). |
| Where | |
|---|---|
Salem  New Jersey (NRC Region 1) | |
| Reporting | |
| Emergency class: | Unusual Event |
| 10 CFR 50.72(a) (1) (i), Emergency Class Declaration | |
| Time - Person (Reporting Time:+-4.63 h-0.193 days <br />-0.0276 weeks <br />-0.00634 months <br />) | |
| Opened: | Tim Przekop 08:04 Mar 24, 2005 |
| NRC Officer: | Bill Huffman |
| Last Updated: | Mar 24, 2005 |
| 41518 - NRC Website
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Unit 2 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (100 %) |