ENS 44056: Difference between revisions
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| facility = Paducah Gaseous Diffusion Plant | | facility = Paducah Gaseous Diffusion Plant | ||
| Organization = | | Organization = | ||
| license number = | | license number = GDP-1 | ||
| region = 2 | | region = 2 | ||
| state = Kentucky | | state = Kentucky | ||
| Line 16: | Line 16: | ||
| event date = 03/11/2008 14:57 CDT | | event date = 03/11/2008 14:57 CDT | ||
| last update date = 03/12/2008 | | last update date = 03/12/2008 | ||
| title = Two Cylinders Identified | | title = Two Cylinders Identified with Weight Change Prior to Wash | ||
| event text = Between 1979 and 1985, approximately 960 thin-walled cylinders were obtained by Paducah Gaseous Diffusion Plant (PGDP), transferred to Allied Chemical, and filled with near-normal assay material as part of a strategic feed reserve. These cylinders were transferred to Oak Ridge Gaseous Diffusion Plant (ORGDP) for storage. They were shipped back to PGDP beginning in the early 1990s. All but three of these cylinders have been fed. In early 2003, the Nuclear Criticality Safety Evaluation (NCSE) was revised to evaluate the washing of the heeled cylinders. | | event text = Between 1979 and 1985, approximately 960 thin-walled cylinders were obtained by Paducah Gaseous Diffusion Plant (PGDP), transferred to Allied Chemical, and filled with near-normal assay material as part of a strategic feed reserve. These cylinders were transferred to Oak Ridge Gaseous Diffusion Plant (ORGDP) for storage. They were shipped back to PGDP beginning in the early 1990s. All but three of these cylinders have been fed. In early 2003, the Nuclear Criticality Safety Evaluation (NCSE) was revised to evaluate the washing of the heeled cylinders. | ||
At 1457 hours on 3/11/2008, the Plant Shift Superintendent was notified that two non-fissile cylinders were identified in the ORGDP strategic reserve category that had a weight change while stored at ORGDP in violation of the NCSE for the C-400 cylinder wash operation. One leg of double contingency is based on it being unlikely that cylinders in this category would be introduced into the process while stored at ORGDP. The weight change indicated that these cylinders were introduced into the process at ORGDP. The other leg of double contingency is based on two individuals independently verifying that the cylinder had no weight change while it was stored at ORGDP. This control was not violated. The NCSE concern associated with these cylinders entering the process is the potential to introduce fissile material into the cylinder while stored at ORGDP and subsequent washing at the non-fissile C-400 cylinder wash. Even though one leg of double contingency was lost, these cylinders were not washed. | At 1457 hours on 3/11/2008, the Plant Shift Superintendent was notified that two non-fissile cylinders were identified in the ORGDP strategic reserve category that had a weight change while stored at ORGDP in violation of the NCSE for the C-400 cylinder wash operation. One leg of double contingency is based on it being unlikely that cylinders in this category would be introduced into the process while stored at ORGDP. The weight change indicated that these cylinders were introduced into the process at ORGDP. The other leg of double contingency is based on two individuals independently verifying that the cylinder had no weight change while it was stored at ORGDP. This control was not violated. The NCSE concern associated with these cylinders entering the process is the potential to introduce fissile material into the cylinder while stored at ORGDP and subsequent washing at the non-fissile C-400 cylinder wash. Even though one leg of double contingency was lost, these cylinders were not washed. | ||
Latest revision as of 18:30, 24 November 2018
| Where | |
|---|---|
| Paducah Gaseous Diffusion Plant Paducah, Kentucky (NRC Region 2) | |
| License number: | GDP-1 |
| Reporting | |
| Response | |
| Time - Person (Reporting Time:+17.78 h0.741 days <br />0.106 weeks <br />0.0244 months <br />) | |
| Opened: | Calvin Pittman 13:44 Mar 12, 2008 |
| NRC Officer: | Pete Snyder |
| Last Updated: | Mar 12, 2008 |
| 44056 - NRC Website | |