ENS 42684
ENS Event | |
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23:49 Jun 30, 2006 | |
Title | 24 Hour License Condition Report - Main Steam Isolation Valve Inoperable Greater Than 4 Hours |
Event Description | FPL Energy Seabrook has discovered a condition that was prohibited by the Technical Specifications. This report is being made pursuant to License Condition 2.G of the Seabrook Station Operating License.
On July 3 at 0615, it was determined that a MSIV had been inoperable for a period of time longer than allowed by the Technical Specifications. On June 30 at 1949, an alarm was received indicating a problem with the MSIV. A troubleshooting and repair plan was developed and the MSIV repaired on July 1 at 1559. Subsequent examination of the failed control module found that it was nonfunctional and that the MSIV had been inoperable since receipt of the alarm on June 30 at 1949. Since the Technical Specification allowed outage time for an inoperable MSVI is 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />, the MSIV being inoperable for approximately 20 hours2.314815e-4 days <br />0.00556 hours <br />3.306878e-5 weeks <br />7.61e-6 months <br /> constitutes a violation of the Technical Specifications. The Resident Inspector has been notified of this event. |
Where | |
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Seabrook ![]() New Hampshire (NRC Region 1) | |
Reporting | |
Other Unspec Reqmnt | |
Time - Person (Reporting Time:+64.57 h2.69 days <br />0.384 weeks <br />0.0884 months <br />) | |
Opened: | M. Arsenault 16:23 Jul 3, 2006 |
NRC Officer: | John Mackinnon |
Last Updated: | Jul 3, 2006 |
42684 - NRC Website
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Unit 1 | |
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Reactor critical | Critical |
Scram | No |
Before | Power Operation (100 %) |
After | Power Operation (100 %) |
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 | |