ENS 44698
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ENS Event | |
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02:18 Dec 5, 2008 | |
Title | Unplanned Hpci Inoperability |
Event Description | On December 4, 2008 at 1735 during steam line warming as part of a planned HPCI pump and valve surveillance, a 4 hour4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> Limiting Condition for Operation was entered for the HPCl Steam Supply Outboard Isolation Valve Bypass Valve (E4150F600) per LCO 3.6.1.3 with the action being to isolate the penetration. This was due to abnormal indications observed from the Main Control Room during movement of the valve.
On December 4, 2008 at 2118, unplanned HPCI inoperability occurred due to isolating the HPCI Steam Supply Inboard Isolation Valve (E4150F002) to satisfy LCO 3.6.1.3 1 for the HPCI Steam Supply Outboard Isolation Valve Bypass Valve (E4150F600) inoperability. A 14 day LCO was entered for HPCI per LCO 3.5.1. This report is being made pursuant to 10CFR50.72(b)(3)(v)(D) as a condition that at the time of discovery could have prevented the fulfillment of a safety function to mitigate the consequences of an accident based on loss of a single train safety system. The NRC Resident Inspector has been notified. |
Where | |
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Fermi Michigan (NRC Region 3) | |
Reporting | |
10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident | |
LER: | 05000341/LER-2008-005 |
Time - Person (Reporting Time:+-1.95 h-0.0813 days <br />-0.0116 weeks <br />-0.00267 months <br />) | |
Opened: | Geoffrey Miller 00:21 Dec 5, 2008 |
NRC Officer: | Joe O'Hara |
Last Updated: | Dec 5, 2008 |
44698 - NRC Website
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Unit 2 | |
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Reactor critical | Critical |
Scram | No |
Before | Power Operation (100 %) |
After | Power Operation (100 %) |
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