05000254/FIN-2010004-01
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Finding | |
|---|---|
| Title | Unit 2 Manual Scram |
| Description | A self-revealed finding of very low safety significance (Green) and associated NCV of 10 CFR 50.65(a)(4) was identified for failure to assess and manage risks associated with maintenance activities. The applicable maintenance activities occurred between July 1, 2010, and August 17, 2010, on Unit 2. The inspectors determined that the licensees actions to assess and manage the risks associated with maintenance activities did not prevent a transient that upset plant stability, and were identified as a performance deficiency. The inspectors identified that this finding has a cross-cutting aspect because the licensee failed to verify the validity of the underlying assumptions supporting the work activity and identify possible unintended consequences (H.1(b)). The inspectors determined the finding was more than minor because the performance deficiency adversely affected the Initiating Events Cornerstone objective to limit the likelihood of events that upset plant stability and challenge critical safety functions during power operations. Using IMC 0609, Table 4a, Initiating Events Cornerstone column, Transient Initiators subsection; the question: Does the finding contribute to both the likelihood of a reactor trip AND that mitigation equipment or functions will not be available? was answered, No by the inspectors because all mitigating functions were available after the event. Therefore, this finding screens as Green, or very low safety significance. |
| Site: | Quad Cities  |
|---|---|
| Report | IR 05000254/2010004 Section 4OA3 |
| Date counted | Sep 30, 2010 (2010Q3) |
| Type: | NCV: Green |
| cornerstone | Initiating Events |
| Identified by: | Self-revealing |
| Inspection Procedure: | IP 71153 |
| Inspectors (proximate) | K Stoedter M Ring J Mcghee E Coffman B Cushman J Draper C Mathews |
| CCA | H.14, Conservative Bias |
| INPO aspect | DM.2 |
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Finding - Quad Cities - IR 05000254/2010004 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Quad Cities) @ 2010Q3
Self-Identified List (Quad Cities)
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