ENS 46515

v t e ENS Event
17:20 Dec 28, 2010
Title	High Pressure Coolant Injection System Inoperable Due to Inoperable Minimum Flow Valve
Event Description	On December 28, 2010 at approximately 1220 hours0.0141 days <br />0.339 hours <br />0.00202 weeks <br />4.6421e-4 months <br />, during surveillance testing of the High Pressure Coolant Injection (HPCI) system, abnormal control room position indication was observed on the HPCI Minimum Flow Valve, E4150F012 as the valve was stroking closed. HPCI had been removed from service for quarterly surveillance testing at 0950 hours0.011 days <br />0.264 hours <br />0.00157 weeks <br />3.61475e-4 months <br />. The unplanned inoperability condition began at 1220 hours0.0141 days <br />0.339 hours <br />0.00202 weeks <br />4.6421e-4 months <br /> when position indication was lost on the minimum flow valve. The valve was manually closed to comply with the action of LCO 3.6.1.3 to isolate the penetration. A 14 day LCO was entered and back dated to the time that HPCI was removed from service 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 needed to mitigate the consequences of an accident, based on loss of a single train safety system. RCIC was and has remained operable. The failure is currently under investigation. The licensee notified the NRC Resident Inspector.

ENS 46515 +/-
Where
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-2010-004
Time - Person (Reporting Time:+-0.88 h-0.0367 days <br />-0.00524 weeks <br />-0.00121 months <br />)
Opened:	Greg Miller 16:27 Dec 28, 2010
NRC Officer:	Donald Norwood
Last Updated:	Dec 28, 2010
46515 - NRC Website
v • d • e

v t e Emergency Notification System
Fermi with 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident
WEEKMONTHYEAR2023-06-13T03:33:00 [Table view]
[ENS list for Fermi]

Navigation menu