ENS 42692

v t e ENS Event
22:00 Jul 7, 2006
Title	Auxiliary Feedwater Pump Recirculation Valve Inoperable
Event Description	At 1700 CDT, Fort Calhoun Station determined that one of the two safety related auxiliary feedwater pumps may not provide sufficient flow to the steam generators during certain design basis events. The circuitry for the minimum flow recirculation valve for the electric motor driven auxiliary feedwater pump contains some components which were not designed as critical quality components. Since these components are not critical quality components, they are assumed to fail in a manner such that the minimum flow recirculation valve would fail open during a design basis event. If this valve should fail open, flow to the steam generators from the electric motor driven auxiliary feedwater pump may not provide adequate flow to cool the steam generators. The station has entered the appropriate technical specification action statement which requires the plant to be in Mode 2 (hot standby) within 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br /> of declaring the pump inoperable. The electric motor driven auxiliary feedwater pump was declared inoperable at 1700 CDT today. The licensee notified the NRC Resident Inspector.

ENS 42692 +/-
Where
Ft Calhoun Nebraska (NRC Region 4)
Reporting

10 CFR 50.72(b)(3)(v)(B), Loss of Safety Function - Remove Residual Heat
Time - Person (Reporting Time:+-2.07 h-0.0863 days <br />-0.0123 weeks <br />-0.00284 months <br />)
Opened:	Erick Matzke 19:56 Jul 7, 2006
NRC Officer:	Mark Abramovitz
Last Updated:	Jul 7, 2006
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v • d • e

v t e Emergency Notification System
Fort Calhoun with 10 CFR 50.72(b)(3)(v)(B), Loss of Safety Function - Remove Residual Heat
WEEKMONTHYEAR2016-03-18T16:28:00 [Table view]
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