ENS 44056: Difference between revisions

v t e ENS Event
19:57 Mar 11, 2008
Title	Two Cylinders Identified with Weight Change Prior to Wash
Event Description	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 hours0.0169 days <br />0.405 hours <br />0.00241 weeks <br />5.543885e-4 months <br /> 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. The cylinder heel of one cylinder is approximately 11 lbs. at 0.711 wt% U-235 in solid form and the other cylinder is approximately 39 lbs. at 0.7 wt% U-235 in solid form. The NRC Senior Resident Inspector has been notified of this event. PGDP Problem Report No. ATRC-08-0730; PGDP Event Report No. PAD-2008-06.

ENS 44056 +/-
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
v • d • e

v t e Emergency Notification System
Paducah Gaseous Diffusion Plant with Response
WEEKMONTHYEAR2012-05-08T21:16:00 [Table view]
[ENS list for Paducah Gaseous Diffusion Plant]

@@ Line 3: / Line 3: @@
 | facility = Paducah Gaseous Diffusion Plant
 | Organization =
-| license number = Gdp-1
+| license number = GDP-1
 | region = 2
 | state = Kentucky

ENS 44056: Difference between revisions

Latest revision as of 19:30, 24 November 2018

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ENS 44056: Difference between revisions

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