ENS 42404

v t e ENS Event
11:00 Mar 10, 2006
Title	Failure of Emergency Exhaust System Dampers
Event Description	At 1050 CST on 3/09/2006 the Auxiliary Building ventilation isolation damper, GKD0129, failed a preventive maintenance stroke test as the result of dirt buildup on the damper vanes. The associated Technical Specification action statement, T/S 3.7.13.a, was entered. At 0500 CST on 3/10/2006 mechanical maintenance personnel observed a similar buildup condition on the redundant train damper, GKD0128, which is in series with GKD0129. At 0838 CST on 3/10/2006 approval was given by the Shift Manager to stroke closed GKD0128 to verify Operability. At 0951 CST 3/10/2006 mechanical maintenance personnel observed that GKD0128 damper vanes remained approximately 45 percent open. T/S 3.7.13.b action for two inoperable emergency exhaust system trains inoperable due to inoperable auxiliary building boundary was entered and back dated to 0500 CST 3/10/2006. Having both trains of auxiliary building ventilation isolation dampers inoperable could prevent the ability to maintain the pressure boundary necessary to control the release of radioactive material. The licensee will notify the Resident Inspector.

ENS 42404 +/-
Where
Callaway Missouri (NRC Region 4)
Reporting

10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material
Time - Person (Reporting Time:+3.03 h0.126 days <br />0.018 weeks <br />0.00415 months <br />)
Opened:	Keith Duncan 14:02 Mar 10, 2006
NRC Officer:	Mark Abramovitz
Last Updated:	Mar 10, 2006
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v • d • e

v t e Emergency Notification System
Callaway with 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material
WEEKMONTHYEAR2019-05-12T04:05:00 [Table view]
[ENS list for Callaway]

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