ENS Event | |
|---|---|
04:55 Aug 16, 2003 | |
| Title | Failure of Autoclave High Pressure Isolation System |
| Event Description | {{#Wiki_filter:At 2355 CST, on 8-15-03 the Plant Shift Superintendent (PSS) was notified of a failure of the C-360 #3 Autoclave High Pressure Isolation System. Steam was observed leaking from the autoclave head-to-shell interface at the six o'clock position shortly after initiating a cylinder heat cycle. At the time of discovery, the autoclave was in TSR mode 5 and the High Pressure Isolation System is required to be operable while in this mode. This system is designed to provide containment of the autoclave and prevent external release of UF6 during a system breach while heating a UF6 cylinder. The PSS declared the system inoperable and TSR LCO 2.1.3.1 actions were Implemented to remove the autoclave from service and place it in Mode 2, "Out of Service". Initial investigation of the incident revealed damage to the autoclave head-to-shall interface sealing surface. The damage resulted from a previous obstruction within the interface while closing the autoclave. Investigation is ongoing to determine the root cause of failure.
The event is reportable as a 24 hour event, as required by 10 CFR 76,120�(2)(I); 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 specified 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 Senior NRC Resident Inspector has been notified of this event. }} |
| Where | |
|---|---|
| Paducah Gaseous Diffusion Plant Paducah, Kentucky (NRC Region 3) | |
| License number: | GDP-1 |
| Reporting | |
| 10 CFR 30.50(b)(2), Licensed Material Protection Equipment Failure | |
| Time - Person (Reporting Time:+13.25 h0.552 days <br />0.0789 weeks <br />0.0181 months <br />) | |
| Opened: | Eric Walker 18:10 Aug 16, 2003 |
| NRC Officer: | Chauncey Gould |
| Last Updated: | Aug 16, 2003 |
| 40082 - NRC Website
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Paducah Gaseous Diffusion Plant with 10 CFR 30.50(b)(2) | |
WEEKMONTHYEARENS 400822003-08-16T04:55:00016 August 2003 04:55:00
[Table view]10 CFR 30.50(b)(2) Failure of Autoclave High Pressure Isolation System 2003-08-16T04:55:00 | |