05000289/FIN-2010007-01
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Finding | |
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| Title | Failure to Use Process or Engineering Controls, as practicable, to Limit Airborne Radioactivity |
| Description | A self-revealing non-cited violation (NCV) of 10 CFR 20.1701 was identified because Exelon did not use process or other engineering controls, to the extent practicable, to control the concentration of radioactive materials in air. Specifically, process or engineering controls were not used to the extent practicable, during vacuuming of a Unit 1 reactor coolant system cold leg, of the \"A\" steam generator, on November 21, 2009. The vacuum was unfiltered and caused generation of airborne radioactivity, subsequent internal and/or external contamination of 145 personnel; dispersal of airborne radioactivity to the Containment work areas, and release of lOW-level contamination to the offsite environment. Workers were evacuated from Containment, the source of the radioactivity was stopped, and the issue was documented in the corrective action program (AR 996823996823. This finding is more than minor because it adversely affected the Occupational Radiation Safety Cornerstone objective to ensure adequate protection of worker health and safety. Using the IMC 0609, Appendix C, Occupational Radiation Safety Significance Determination Process, the finding was determined to be of very low safety significance because it did not involve: (1) as low as is reasonably achievable collective exposure planning and controls, (2) an overexposure, (3) a substantial potential for overexposure, or (4) an impaired ability to assess dose. The cause of the finding is related to the cross-cutting area of Human Performance, Work Control aspect H.3(a), in that radiological controls requirements, developed for this task, were not adequately planned, coordinated, or incorporated to preclude its occurrence. (Section 40A3.3.5 |
| Site: | Three Mile Island  |
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| Report | IR 05000289/2010007 Section 4OA3 |
| Date counted | Mar 31, 2010 (2010Q1) |
| Type: | NCV: Green |
| cornerstone | Or Safety |
| Identified by: | Self-revealing |
| Inspection Procedure: | IP 71153 |
| Inspectors (proximate) | W Schmidt R Nimitz J Brand D Kern D Spindler E Burket J R Whit |
| CCA | H.5, Work Management |
| INPO aspect | WP.1 |
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Finding - Three Mile Island - IR 05000289/2010007 | |||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Three Mile Island) @ 2010Q1
Self-Identified List (Three Mile Island)
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