ENS 45629

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v t e ENS Event
14:50 Jan 13, 2010
Title	Process Gas Leak Detection System Inoperable
Event Description	At 0850 CST, on 1-13-10 the Plant Shift Superintendent (PSS) was notified that the C-333 B-Booster UF6 Release Detection (PGLD) system was inoperable due to loss of power to the system. The purpose of the PGLD System is to detect a UF6 release and alert operators in the ACR by sounding an alarm. At the time this was discovered, some areas covered by this PGLD system were operating above atmospheric pressure. TSR 2.4.4.1 requires that at least the minimum number of detector heads in the areas covered by this PGLD system are operable during steady state operations above atmospheric pressure. With the B-Booster PGLD system inoperable, none of the required heads were operable. This PGLD System was declared inoperable, TSR LCO 2.4.4.1.D.1 and 2.4.4.1.E.1 were entered, and a continuous smoke watch was put in place within one hour. An investigation was initiated and it was determined that power was interrupted during planned maintenance activities and there was a failure to identify that the power supply to this PGLD system would be impacted prior to performing the maintenance. Power was restored and the system was tested and declared operable at 1542 hours0.0178 days <br />0.428 hours <br />0.00255 weeks <br />5.86731e-4 months <br />. This event is reportable as a 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> event in accordance with 10CFR76.120(c)(2)(i). This is an event in which equipment is disabled or fails to function as designed when: a.) the equipment is required by a TSR to prevent releases, prevent exposures to radiation and radioactive materials exceeding specified limits, mitigate the consequences of an accident, or restore this facility to a pre established safe condition after an accident; b.) the equipment is required by a TSR to be available and operable and either should have been operating or should have operated on demand, and c.) no redundant equipment is available and operable to perform the required safety function. The NRC Senior Resident Inspector has been notified of this event.

ENS 45629 +/-
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:+18 h0.75 days <br />0.107 weeks <br />0.0247 months <br />)
Opened:	Dereck Warford 08:50 Jan 14, 2010
NRC Officer:	Donald Norwood
Last Updated:	Jan 14, 2010
45629 - 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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