ENS 51250

v t e ENS Event
09:45 Jul 22, 2015
Title	Hpci Declared Inoperable
Event Description	During the performance of the Unit 1 quarterly surveillance 1-SR-3.6.1.3.5 (HPCI), HPCI [High Pressure Coolant Injection] System Motor Operated Valve Operability, the inboard steam isolation valve failed to close within the required time. The valve was subsequently declared inoperable and Technical Specification (TS) Limiting Condition for Operation (LCO) 3.6.1.3 (Primary Containment Isolation Valves (PCIVs)) was entered which required the HPCI steam line to be closed and de-activated. To comply with TS LCO 3.6.1.3 Condition A, the outboard steam isolation valve was closed and breaker opened. Due to the steam line being isolated, TS 3.5.1, ECCS Operating, Condition C was entered on July 22, 2015 at 0445 CDT as a result of the inoperable HPCI system. Troubleshooting and repair is in progress and during this inoperability, other systems are available to provide the required safety functions. This constitutes an unplanned HPCI system inoperability and requires an 8-hour ENS notification in accordance with 10 CFR 50.72(b)(3)(v)(D), due to the failure of a single train system affecting accident mitigation, and a 60-day written report in accordance with 10 CFR 50.73(a)(2)(v)(D). The NRC Resident Inspector has been notified.

ENS 51250 +/-
Where
Browns Ferry Alabama (NRC Region 2)
Reporting

10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident
Time - Person (Reporting Time:+2.88 h0.12 days <br />0.0171 weeks <br />0.00395 months <br />)
Opened:	John Ridinger 12:38 Jul 22, 2015
NRC Officer:	Donald Norwood
Last Updated:	Jul 22, 2015
51250 - NRC Website
v • d • e

v t e Emergency Notification System
Browns Ferry with 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident
WEEKMONTHYEAR2024-03-19T15:30:00 [Table view]
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