ENS 41882

v t e ENS Event
02:25 Jul 29, 2005
Title	Failure Of Safety Equipment On C-310 Cylinder Valve Closure System
Event Description	At 2125, on 7-29-05 the Plant Shift Superintendent was notified that the nitrogen bottle pressure for the C-310 Cylinder Valve Closure System was reading 0 psig. The function of this system is to close the cylinder valve in the case of an actuation of the UF6 Release Detection and Isolation System at the UF6 Withdrawal Station. TSR 2.3.4.1 requires this system to be operable while operating in mode 2. At the time the nitrogen bottle pressure was discovered to be reading 0 psig, withdrawal positions 3 and 4 were operating in mode 2. The UF6 Release Detection and Isolation System was declared inoperable by the PSS and withdrawal positions 3 and 4 were placed in mode 3 as required by TSR LCO 2.3.4.1. This event is reportable under 10 CFR 76.120(c)(2) as an event in which equipment required by the TSR is disabled or fails to function as designed. The NRC Senior Resident Inspector has been notified of this event. The nitrogen bottle normally maintains a pressure of 1500-2000 psig. The system malfunction was found on the daily equipment check by the operator.

ENS 41882 +/-
Where
Paducah Gaseous Diffusion Plant Paducah, Kentucky (NRC Region 2)
License number:	Gdp-1
Reporting

10 CFR 76.120(c)(2)
Time - Person (Reporting Time:+14.5 h0.604 days <br />0.0863 weeks <br />0.0199 months <br />)
Opened:	M.C. Pitman 16:55 Jul 29, 2005
NRC Officer:	John Knoke
Last Updated:	Jul 29, 2005
41882 - NRC Website
v • d • e

v t e Emergency Notification System
Paducah Gaseous Diffusion Plant with 10 CFR 76.120(c)(2)
WEEKMONTHYEAR2014-05-08T15:24:00 [Table view]
[ENS list for Paducah Gaseous Diffusion Plant]

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