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At 0650 on 12-04-04, the Plant Shift Super … 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 hour 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.</br>The NRC Resident Inspector has been notified of this event.</br>PGDP Problem Report No. ATR-04-4819, PGDP Event Report No. PAD-2004-28.4-4819, PGDP Event Report No. PAD-2004-28. +
12:50:00, 4 December 2004 +
41,244 +
07:42:00, 5 December 2004 +
12:50:00, 4 December 2004 +
At 0650 on 12-04-04, the Plant Shift Super … 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 hour 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.</br>The NRC Resident Inspector has been notified of this event.</br>PGDP Problem Report No. ATR-04-4819, PGDP Event Report No. PAD-2004-28.4-4819, PGDP Event Report No. PAD-2004-28. +
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00:00:00, 5 December 2004 +
GDP-1 +
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07:42:00, 5 December 2004 +
0.786 d (18.87 hours, 0.112 weeks, 0.0258 months) +
12:50:00, 4 December 2004 +
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