ENS 53861

v t e ENS Event
00:04 Feb 6, 2019
Title	Unit One Hpci System Inoperable Due to Blown Fuse
Event Description	On February 5, 2019, at 1804 [CST], during a Unit 1 High Pressure Coolant Injection (HPCI) operability surveillance, a fuse blew in the logic for the motor speed changer for the turbine. The Unit 1 HPCI system was taken out of service for planned maintenance earlier in the day. The fuse issue was not related to any maintenance activities. Had HPCI been demanded, this fuse failure would not have allowed HPCI to reach its required speed. HPCI remains inoperable pending resolution of the issue. The Reactor Core Isolation Cooling (RCIC) system was confirmed operable. There were no other systems inoperable at the time of the event. HPCI had been last successfully tested on November 6, 2018. This event is being reported as a condition that could have prevented fulfillment of a safety function in accordance with 10 CFR 50.72(b)(3)(v)(D). The HPCI system is a single train system and the loss of HPCI could impact the plant's ability to mitigate the consequences of an accident. The NRC Senior Resident Inspector has been notified. Inoperable HPCI places the unit in a 14 day Technical Specification Limiting Condition of Operability.

ENS 53861 +/-
Where
Quad Cities Illinois (NRC Region 3)
Reporting

10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident
Time - Person (Reporting Time:+2.3 h0.0958 days <br />0.0137 weeks <br />0.00315 months <br />)
Opened:	Derek Drockelman 02:22 Feb 6, 2019
NRC Officer:	Jeffrey Whited
Last Updated:	Feb 6, 2019
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v • d • e

v t e Emergency Notification System
Quad Cities with 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident
WEEKMONTHYEAR		Oprm Count Setpoint Discrepancy 2022-07-04T06:30:00 [Table view]
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