ENS Event | |
|---|---|
19:00 Mar 29, 2005 | |
| Title | 24 - Hr Condition of License Report Due to T.S. Not Met |
| Event Description | The licensee provided the following information:
On March 29, 2005, Seabrook determined that the requirements of T.S. 3.8.1.1 were not met when the Reserve Auxiliary Transformer (RAT), AC supply to the Bus E5, was removed from service on February 14, 2005. T.S. 3.8..1.1, Action a. requires that the operability of the remaining AC power source be verified within 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br />, and at least once every 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> thereafter. This action requirement was not completed on February 14, 2005 when the RAT AC power supply to Bus E5 was removed from service. At the time of this event the unit Auxiliary Transformer AC power supply to Bus E5 and E6, and the RAT AC power supply to bus E6, were in service. This event is reportable pursuant to Seabrook Station license, Condition 2.G., as a violation of the Technical Specifications. The licensee notified the NRC Resident Inspector. |
| Where | |
|---|---|
Seabrook  New Hampshire (NRC Region 1) | |
| Reporting | |
| Other Unspec Reqmnt | |
| Time - Person (Reporting Time:+-3.6 h-0.15 days <br />-0.0214 weeks <br />-0.00493 months <br />) | |
| Opened: | Damon Ritter 15:24 Mar 29, 2005 |
| NRC Officer: | John Knoke |
| Last Updated: | Mar 29, 2005 |
| 41543 - NRC Website | |
Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (95 %) |
| After | Power Operation (95 %) |
WEEKMONTHYEARENS 457382010-02-26T04:15:00026 February 2010 04:15:00
[Table view]Other Unspec Reqmnt Discovery of an After-The-Fact Unusual Event ENS 426842006-06-30T23:49:00030 June 2006 23:49:00 Other Unspec Reqmnt 24 Hour License Condition Report - Main Steam Isolation Valve Inoperable Greater than 4 Hours ENS 426602006-06-22T10:20:00022 June 2006 10:20:00 Other Unspec Reqmnt 24 Hour License Condition Report of Operation in a Condition Prohibited by Technical Specification ENS 423972006-03-08T13:00:0008 March 2006 13:00:00 Other Unspec Reqmnt 24-Hour Condition of License Report Due to Failure to Submit Ts Required Exposure Report ENS 421782005-11-30T08:24:00030 November 2005 08:24:00 Other Unspec Reqmnt Inverter Inoperable for Greater than Allowed Time Per Technical Specifications ENS 418242005-07-07T14:17:0007 July 2005 14:17:00 Other Unspec Reqmnt License Condition Report Due to Exceeding Technical Specification Inoperability Time ENS 415432005-03-29T19:00:00029 March 2005 19:00:00 Other Unspec Reqmnt 24 - Hr Condition of License Report Due to T.S. Not Met ENS 413402005-01-15T05:00:00015 January 2005 05:00:00 Other Unspec Reqmnt Unspecified Requirement ENS 410952004-10-05T22:30:0005 October 2004 22:30:00 Other Unspec Reqmnt One of Two Pressurizer Level Instrumentation Channels Found to Be Inoperable. ENS 408422004-06-25T14:50:00025 June 2004 14:50:00 Other Unspec Reqmnt Plant Exceeded Lco Action Statement Limits 2010-02-26T04:15:00 | |