ENS 47806

v t e ENS Event
22:16 Apr 4, 2012
Title	Degraded Condition Due to Identified Reactor Pressure Vessel Test Leakage
Event Description	On April 4, 2012, at 1716 [CDT], with Unit 2 shutdown for refueling, leakage was identified from a 2-inch vessel nozzle during a Reactor Pressure Vessel (RPV) pressure test. The leakage amount was approximately one drop per second. The penetration (N-11B) is a reference leg used for reactor vessel instrumentation. The leakage originates from the area where the nozzle penetrates the vessel wall. The nozzle is welded on the inside of the vessel, so the actual attachment weld could not be examined at the time of this report. The RPV pressure test has been stopped and the reactor vessel depressurized. The cause and resolution are under evaluation. The condition is being reported under 50.72(b)(3)(ii)(A) given the defect was associated with the primary coolant system pressure boundary. The licensee notified the NRC Resident Inspector.

ENS 47806 +/-
Where
Quad Cities Illinois (NRC Region 3)
Reporting

10 CFR 50.72(b)(3)(ii)(A), Seriously Degraded
LER:	05000265/LER-2012-002 For Quad Cities Unit 2 Regarding Reactor Vessel Instrument Nozzle Leakage Due to Intergranular Stress Corrosion Cracking
Time - Person (Reporting Time:+-0.73 h-0.0304 days <br />-0.00435 weeks <br />-9.99954e-4 months <br />)
Opened:	Brian Magnuson 21:32 Apr 4, 2012
NRC Officer:	Vince Klco
Last Updated:	Apr 4, 2012
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v • d • e

v t e Emergency Notification System
Quad Cities with 10 CFR 50.72(b)(3)(ii)(A), Seriously Degraded
WEEKMONTHYEAR2014-03-31T18:02:00 [Table view]
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