05000456/FIN-2014005-01
From kanterella
Jump to navigation
Jump to search
Finding | |
|---|---|
| Title | Failure to Adequately Evaluate Operability Following the Discovery of an Unanalyzed Condition Involving the Probable Maximum Precipitation Event |
| Description | The inspectors identified a finding of very low safety significance (Green) and an associated NCV of 10 CFR Part 50, Appendix B, Criterion V, Instructions, Procedures, and Drawings, when licensee personnel failed to adhere to Operability Determination Process standards after identifying an unanalyzed condition that had the potential to adversely impact numerous safety-related systems during a probable maximum precipitation (PMP) event. The issue was entered into the Corrective Action Program (CAP) as Issue Report (IR) 2396124. Corrective actions for this issue included performing an operability evaluation. The performance deficiency was more than minor in accordance with IMC 0612, Appendix B, Issue Screening because the issue was associated with the Protection Against External Factors attribute of the Mitigating System cornerstone and adversely affected the cornerstone objective of ensuring the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences (i.e., core damage). Specifically, the licensee evaluated an unanalyzed condition utilizing another power plants licensing basis in a manner that was not accurate and was not adequate. The finding was of very low safety significance (Green) because the potentially impacted systems remained operable. The finding had a cross-cutting aspect of Avoid Complacency in the Human Performance area. Specifically, the licensee failed to recognize and plan for the possibility of mistakes and plant specific differences between Braidwood and Byron while using Byrons current licensing basis to evaluate a Braidwood condition not previously analyzed (H.12). |
| Site: | Braidwood  |
|---|---|
| Report | IR 05000456/2014005 Section 1R15 |
| Date counted | Dec 31, 2014 (2014Q4) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.15 |
| Inspectors (proximate) | B Boston B Palagi D Betancourt J Benjamin J Ellegood J Mcghee K Barclay M Holmberg M Perry R Jickling |
| Violation of: | 10 CFR 50 Appendix B Criterion V |
| CCA | H.12, Avoid Complacency |
| INPO aspect | QA.4 |
| ' | |
Finding - Braidwood - IR 05000456/2014005 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Finding List (Braidwood) @ 2014Q4
Self-Identified List (Braidwood)
| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||