ENS 42143

v t e ENS Event
10:22 Nov 16, 2005
Title	Incorrect Reading Of Hpci Position Indicating Lights On Control Room Panel.
Event Description	At 0422, during a panel tour in preparation for shift turnover, a Reactor Operator identified that both position indicating lights for HPCI-MO-19 were not illuminated. For current plant conditions the closed position indication should have been illuminated. The position indication for this valve is powered from 125 VDC, which also provides control power for the valve operation. Without control power, the valve would not open upon HPCI system initiation. HPCI was declared inoperable. Per the discussion in NUREG 1022, inoperability of a single train system is reportable as an 8 hour9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> report. Per Technical Specifications, RCIC was verified to be operable immediately, and restoration of HPCI to an operable condition is required within 14 days. The licensee indicated that the valve position was always in the correct posture although the panel light did not reflect it true position. This is a 14 day LCO. The licensee notified the NRC Resident Inspector.

ENS 42143 +/-
Where
Cooper Nebraska (NRC Region 4)
Reporting

10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident
Time - Person (Reporting Time:+-1.08 h-0.045 days <br />-0.00643 weeks <br />-0.00148 months <br />)
Opened:	Steve Wheeler 09:17 Nov 16, 2005
NRC Officer:	John Knoke
Last Updated:	Nov 16, 2005
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v • d • e

v t e Emergency Notification System
Cooper with 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident
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