05000443/FIN-2014003-01
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Finding | |
|---|---|
| Title | Inadequate Technical Evaluation of Safety-Related Structures |
| Description | The inspectors identified a finding of very low safety significance (Green) because NextEra did not perform adequate evaluations of safety-related residual heat removal (RHR) vaults. Specifically, additional technical evaluation and analysis was not adequately conducted on the safety-related A and B RHR concrete vaults when it was determined that they exceeded the quantitative limits specified in NextEra procedures. NextEra entered the failure to perform adequate technical evaluations on concrete structures exceeding American Concrete Institute (ACI) Tier II quantitative requirements into the CAP (action request (AR) 01929460), and planned to perform a formal technical evaluation of the A and B RHR vault conditions in accordance with their structural monitoring program procedure and the ACI 349.3R-96 standard. The performance deficiency was considered to be more than minor because it affected the protection against external factors attribute of the Mitigating Systems cornerstone and its objective to ensure the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences. Specifically, the inspectors concluded that the reliability of the structures was affected in that they exceeded the specified Tier II limits without the performance of further technical evaluations. The issue was evaluated in accordance with IMC 0609, Appendix A, The Significance Determination Process for Findings At-Power, and determined to be of very low safety significance (Green) because it did not represent an actual loss of function of at least a single train for greater than its Technical Specification Allowed Outage Time or two separate safety systems out-of-service for greater than it Technical Specification Allowed Outage Time. This finding is related to the cross-cutting area of Human Performance Procedure Adherence, because NextEra did not follow processes, procedures, and work instructions. Specifically, NextEra personnel did not perform an adequate technical evaluation of two safety-related concrete structures that exceeded the quantitative criteria requiring such an evaluation [H.8]. |
| Site: | Seabrook  |
|---|---|
| Report | IR 05000443/2014003 Section 1R12 |
| Date counted | Jun 30, 2014 (2014Q2) |
| Type: | Finding: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.12 |
| Inspectors (proximate) | B Dionne C Newport G Dentel P Cataldo T O'Hara |
| CCA | H.8, Procedure Adherence |
| INPO aspect | WP.4 |
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Finding - Seabrook - IR 05000443/2014003 | ||||||||||||||||||||||||||||||||||||||
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Finding List (Seabrook) @ 2014Q2
Self-Identified List (Seabrook)
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