ENS 47483: Difference between revisions
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| event date = 11/28/2011 09:30 CST | | event date = 11/28/2011 09:30 CST | ||
| last update date = 11/28/2011 | | last update date = 11/28/2011 | ||
| title = 24-Hour Report Concerning | | title = 24-Hour Report Concerning a Localized Loss of a Geometry Criticality Control Contingency | ||
| event text = At 0930 CST on 11-28-11, during annual inspection of the C-400/C-409 floor drains and sumps according to procedure CP4-CU-CH6021, a chemical operator identified that an eye wash drain was no longer properly sealed around the concrete base and would not prevent solutions from entering the drain if challenged. NCSA [Nuclear Criticality Safety Assessment] CHM-001 requires specific drains to be sealed to prevent the accumulation of fissile material in the unsafe geometry drain system. In violation of NCSA CHM-001, the poured concrete base surrounding the eye wash drain #147 in C-400 was discovered to be broken loose from the floor so that it could no longer provide a seal against spilled uranium solution getting into the drain system. | | event text = At 0930 CST on 11-28-11, during annual inspection of the C-400/C-409 floor drains and sumps according to procedure CP4-CU-CH6021, a chemical operator identified that an eye wash drain was no longer properly sealed around the concrete base and would not prevent solutions from entering the drain if challenged. NCSA [Nuclear Criticality Safety Assessment] CHM-001 requires specific drains to be sealed to prevent the accumulation of fissile material in the unsafe geometry drain system. In violation of NCSA CHM-001, the poured concrete base surrounding the eye wash drain #147 in C-400 was discovered to be broken loose from the floor so that it could no longer provide a seal against spilled uranium solution getting into the drain system. | ||
SAFETY SIGNIFICANCE OF EVENTS | SAFETY SIGNIFICANCE OF EVENTS |
Revision as of 22:05, 1 March 2018
Where | |
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Paducah Gaseous Diffusion Plant Paducah, Kentucky (NRC Region 2) | |
License number: | Gdp-1 |
Reporting | |
Response | |
Time - Person (Reporting Time:+3.7 h0.154 days <br />0.022 weeks <br />0.00507 months <br />) | |
Opened: | Billy Wallace 19:12 Nov 28, 2011 |
NRC Officer: | Bill Huffman |
Last Updated: | Nov 28, 2011 |
47483 - NRC Website | |