ENS 41682

v t e ENS Event
11:04 Apr 3, 2005
Title	Containment Isolation Valve Closure
Event Description	This telephone notification is provided in accordance with 10 CFR 50.73(a)(1), to report an invalid actuation reportable under 10 CFR 50.73(a)(2)(iv)(A), 'Any event or condition that resulted in manual or automatic actuation of any system listed in paragraph (a)(2)(iv)(B).' General containment isolation signals affecting containment isolation valves in more than one system are identified in paragraph (a)(2)(iv)(B). On April 3, 2005, at 0604 hours0.00699 days <br />0.168 hours <br />9.986772e-4 weeks <br />2.29822e-4 months <br />, with Unit 2 in Mode 1, 'Power Operation,' fuse 2-902-3-RR-F20 in the 902-3 panel failed, which resulted in a partial Group 2 Primary Containment Isolation. The containment isolation signal affected containment isolation valves in more than one system. All affected containment isolation valves operated as designed. The fuse was successfully replaced and all affected components were restored to operable status. The fuse was replaced at 0630 on 4/3/2005 and isolation valves were restored to the normal at-power lineup at 0637. The licensee notified the NRC Resident Inspector.

ENS 41682 +/-
Where
Dresden Illinois (NRC Region 3)
Reporting

10 CFR 50.73(a)(1), Submit an LER, Invalid Actuation
Time - Person (Reporting Time:+874.55 h36.44 days <br />5.206 weeks <br />1.198 months <br />)
Opened:	Gary Sipe 21:37 May 9, 2005
NRC Officer:	Mark Abramovitz
Last Updated:	May 9, 2005
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v • d • e

v t e Emergency Notification System
Dresden with 10 CFR 50.73(a)(1), Submit an LER
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