05000346/FIN-2010004-01
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Finding | |
|---|---|
| Title | Failure to Assess and Manage Risk During Conservative Grid Operations |
| Description | The inspectors identified a finding of very low safety significance (Green) and associated non-cited violation (NCV) of 10 CFR 50.65(a)(4), for the failure to implement appropriate risk management actions when conservative grid operations were declared at the station. The licensee included this finding in their corrective action program as CR 10-79727. An immediate corrective action was taken to appropriately apply orange risk controls to activities representing risk to generation or grid reliability during the period of conservative grid operations
The inspectors determined that the failure to implement appropriate risk management actions in accordance with procedure NOP-OP-1007, Risk Management, was a performance deficiency. In accordance with IMC 0612, Appendix E, Examples of Minor Issues, this issue was more than minor because it was sufficiently similar to more-than-minor Example 7.f in that overall plant risk would be in a higher licensee established risk category. The inspectors determined that the finding affected the initiating events cornerstone and could be evaluated using the SDP in accordance with IMC 0609, Significance Determination Process. Because the finding was associated with maintenance risk management, characterization and initial screening was accomplished using IMC 0609, Appendix K, Maintenance Risk Assessment and Risk Management Significance Determination Process. In accordance with flowchart 2, the inspectors determined the finding to be of very low safety significance (Green) because the incremental core damage probability (ICDP) at the plant during the period of conservative grid operations was less than 1.0E-6. This finding has a cross-cutting aspect in the decision-making component of the human performance cross-cutting area because, when faced with changing plant conditions, the licensee did not appropriately use a systematic process to make a risk-significant decision. |
| Site: | Davis Besse  |
|---|---|
| Report | IR 05000346/2010004 Section 1R01 |
| Date counted | Sep 30, 2010 (2010Q3) |
| Type: | NCV: Green |
| cornerstone | Initiating Events |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.01 |
| Inspectors (proximate) | M Marshfield J Rutkowski A Wilson D Kimble T Go J Cameron P Voss |
| CCA | H.13, Consistent Process |
| INPO aspect | DM.1 |
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Finding - Davis Besse - IR 05000346/2010004 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Davis Besse) @ 2010Q3
Self-Identified List (Davis Besse)
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