05000456/FIN-2011004-04
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Finding | |
|---|---|
| Title | Operability Evaluation Not Performed in Accordance with Station Standards |
| Description | The inspectors identified an URI related to multiple quality and process issues pertaining to Operability Evaluation, IR 1185016, Non-Conservatisms in the Turbine Building HELB Analyses. At the conclusion of this inspection, the licensee had not completed their review of the issue. During a review of Operability Evaluation, IR 1185016, Non-Conservatisms in the Turbine Building HELB Analyses, the inspectors identified a number of issues, questions, and aspects that required additional inspection effort. The inspectors identified several aspects of the operability evaluation that did not adhere to the stations operability determination process as described in procedure OP-AA-108-115, Operability Determination. The following specific issues were identified: The evaluation did not evaluate the non-conforming condition against the plants licensing basis single failure criterion; The evaluation did not adequately consider a pipe leak in accordance with licensing basis standards; The station did not perform an adequate extent of condition review. In particular, the inspectors identified a similar L-wall damper penetration from the turbine building into the safety-related lower cable spreading room that could be affected by a turbine building HELB. For MEER 12 and MEER 22, the licensee did not evaluate the consequences of a turbine building HELB and isolation damper failure. These rooms contained both trains of Unit 1 and Unit 2 reactor trip breakers, respectively. The evaluation was not stand alone as described in Section 4.4.2, which required that, The Operability Evaluation should contain sufficient detail for a knowledgeable individual to independently reach the same conclusions as the Preparer (i.e., the OpEval must be able to stand alone). This URI will remain open pending the licensees completion of the operability evaluation review efforts regarding the non-conforming conditions, the inspectors review of those efforts, an independent extent of condition review conducted by the inspectors, and a review of the licensees corrective actions to restore compliance with the licensing basis. (URI 05000456/2011004-04; 05000457/2011004-04, Operability Evaluation Not Performed in Accordance with Station Standards) |
| Site: | Braidwood  |
|---|---|
| Report | IR 05000456/2011004 Section 1R15 |
| Date counted | Sep 30, 2011 (2011Q3) |
| Type: | URI: |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.15 |
| Inspectors (proximate) | A Dunlop A Garmoe B Bartlett B Palagi E Duncan J Benjamin J Nance M Learn M Perry R Jicklin T Go V Megania Garmoeb Palagi D Reeser E Duncan G O'Dwyer J Benjamin M Perry R Ng |
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Finding - Braidwood - IR 05000456/2011004 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Braidwood) @ 2011Q3
Self-Identified List (Braidwood)
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