ENS 44621

From kanterella

Jump to navigation Jump to search

v t e ENS Event
13:37 Nov 1, 2008
Title	Process Gas Leak Detection System Not Functioning Correctly
Event Description	At 0837 CDT, on 11-01-08 the Plant Shift Superintendent (PSS) was notified that the Process Gas Leak Detection (PGLD) system for C-333 Unit 5 Cell 3 was not functioning as required. An operator was preparing to test fire the system as required by TSR SR 2.4.4.1-1 when it was discovered that the Ready light was not illuminated. This PGLD system contains detectors that cover C-333 Unit 5 Cell 3 and Section 1 and 2 of the cell bypass piping. At the time of this failure, Unit 5 Cell 3 and some areas of Sections 1 and 2 of the cell bypass were operating above atmospheric pressure. TSR 2.4.4.1 requires that at least the minimum number of detector heads in the cell and in each defined section of the cell bypass are operable during steady state operations above atmospheric pressure. With the Unit 5 Cell 3 PGLD system inoperable, none of the required cell heads and only 2 of the required 3 heads in Sections 1 and 2 of the cell bypass were operable. This PGLD System was declared inoperable, TSR LCO 2.4.4.1.B.1 and 2.4.4.1.C.1 were entered and a continuous smoke watch was put in place within one hour. Engineering has determined that the system would not have been able to perform its intended safely function with the Ready light not illuminated. 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 10CFR 76.120(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 Resident Inspector has been notified of this event. PGDP Assessment and Tracking Report No. ATR.08-3142; PGDP Event Report No. PAD-2008.034;

ENS 44621 +/-
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:+0.98 h0.0408 days <br />0.00583 weeks <br />0.00134 months <br />)
Opened:	Kevin Beasley 14:36 Nov 1, 2008
NRC Officer:	John Knoke
Last Updated:	Nov 1, 2008
44621 - 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]

Retrieved from "https://kanterella.com/w/index.php?title=ENS_44621&oldid=1183963"

ENS Notification