ENS 48108

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v t e ENS Event
15:30 Jul 15, 2012
Title	Unit 1 High Pressure Coolant Injection (Hpci) Inoperable Due to Valve Leak
Event Description	On July 15, 2012, at 1030 hours0.0119 days <br />0.286 hours <br />0.0017 weeks <br />3.91915e-4 months <br />, a defect (pinhole through-wall leak) was identified on the 1-2301-29 valve (HPCI Steam Line to Main Condenser Isolation Valve). The defect was identified during a routine system walkdown. The 1-2301-29 valve (1" valve downstream of the HPCI drain pot) is normally open during HPCI standby operation and closes upon system initiation. Due to the location of the defect, the 1-2301-29 valve would not have completely isolated the steam line as designed. As a result, HPCI was declared inoperable. Given that HPCI is a single train system, this notification is being made in accordance with 10CFR50.72(b)(3)(v)(D). HPCI will remain inoperable until system repairs are complete. The NRC Resident Inspector has been informed. * * RETRACTION AT 1216 EDT ON 8/17/2012 FROM DALE STEEL TO MARK ABRAMOVITZ * * * The purpose of this notification is to retract the ENS Report made on July 15, 2012, at 1030 hours0.0119 days <br />0.286 hours <br />0.0017 weeks <br />3.91915e-4 months <br /> (ENS 48108). Further evaluation performed by Quad Cities Station confirms the Unit 1 HPCI system would have performed its safety function. Based on this subsequent evaluation, ENS 48108 is being retracted. Note: On July 21, the 1-2301-29 valve (HPCI Steam Line to Main Condenser Isolation Valve) was successfully repaired and HPCI was returned to Operable status. The licensee notified the NRC Resident Inspector. Notified the R3DO (Giessner).

ENS 48108 +/- *RETRACTED*
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:+0.58 h0.0242 days <br />0.00345 weeks <br />7.94484e-4 months <br />)
Opened:	Joe Bellish 16:05 Jul 15, 2012
NRC Officer:	Charles Teal
Last Updated:	Aug 17, 2012
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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]
[ENS list for Quad Cities]

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