ENS 41244

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v t e ENS Event
12:50 Dec 4, 2004
Title	High Pressure Transmitter Failure
Event Description	At 0650 on 12-04-04, the Plant Shift Superintendent (PSS) was notified of a failure of the C-333A Autoclave 1 North High Cylinder Pressure System (HCPS). During a normal cylinder heating cycle an operator noted that the cylinder pressure, read on a recorder in the Operations Monitoring Room (OMR), unexpectedly fell from 70 to 0 psia. The PSS declared the system inoperable and TSR LCO 2.2.4.14B actions were implemented to place the autoclave in Mode 2 (autoclave open, non-applicable mode). The High Cylinder Pressure System (TRS 2.2.4.14) is designed to minimize the potential of a primary system failure (cylinder rupture) during a pressure increase event by automatically isolating the steam supply to the autoclave prior to reaching the Maximum Allowable Working Pressure (MAWP) of the cylinder. The 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, as required by 10 CFR 76.120(c)(2)(1); An event in which equipment is disabled or fails to function as designed when the equipment is required by a TSR to prevent releases, prevent exposures to radiation and radioactive materials exceeding specific limits, mitigate the consequences of an accident, or restore this facility to a preestablished safe condition after an accident. The equipment was required by TSR to be available and operable and no redundant equipment was available to perform the required safety function. The NRC Resident Inspector has been notified of this event. PGDP Problem Report No. ATR-04-4819, PGDP Event Report No. PAD-2004-28.

ENS 41244 +/-
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:+18.87 h0.786 days <br />0.112 weeks <br />0.0258 months <br />)
Opened:	Eric Walker 07:42 Dec 5, 2004
NRC Officer:	John Mackinnon
Last Updated:	Dec 5, 2004
41244 - 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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