ENS 42817

v t e ENS Event
15:11 Aug 31, 2006
Title	Hpci Declared Inoperable Due to Stop Valve Indication Issue
Event Description	At 1111, on August 31, 2006, during performance of SO-152-006 HPCI was declared inoperable when the HPCI Turbine Stop Valve FV-15612 had dual position indication. Local observation of the stop valve by plant operators and a report from the system engineer verified the valve was closed, and the problem appears to be a limit switch problem. With the lower limit switch not responding correctly the system engineer informed the control room the HPCI Ramp Generator is not reset, which will result in an over speed condition of the HPCI turbine if an actuation signal is received. To prevent possible damage to the HPCI turbine, control room personnel overrode HPCI injection in accordance with plant operating procedures. Plans are being developed to investigate the problem, and adjust the limit switch if required. This is being reported as an event or condition that could have prevented fulfillment of a safety function required to mitigate the consequences of an accident in accordance with 10CFR50.72(b)(3)(v)(D). The licensee has entered the provisions of TS 3.5.1 for this condition. No other accident mitigation systems are currently inoperable. The licensee notified the NRC Resident Inspector.

ENS 42817 +/-
Where
Susquehanna Pennsylvania (NRC Region 1)
Reporting

10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident
Time - Person (Reporting Time:+-0.75 h-0.0313 days <br />-0.00446 weeks <br />-0.00103 months <br />)
Opened:	Ron Fry 14:26 Aug 31, 2006
NRC Officer:	Jason Kozal
Last Updated:	Aug 31, 2006
42817 - NRC Website
v • d • e

v t e Emergency Notification System
Susquehanna with 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident
WEEKMONTHYEAR2023-04-08T00:52:00 [Table view]
[ENS list for Susquehanna]

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