05000440/FIN-2010005-05
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Finding | |
|---|---|
| Title | Seismic Stability of Standby Liquid Control Test Tank |
| Description | On November 8, 2010, the inspectors conducted a review of the quarterly pump and valve test for the standby liquid control system. Information from operating experience concerning seismic stability of similar SLC systems at other sites was incorporated in the review. The SLC system at other sites was determined to be not seismically stable with water in the tank, and the system operation at the other sites had been modified to involve only filling the test tank with water to support the actual conduct of a test. Perry subsequently directed draining of the test tank while an evaluation was conducted. The licensee conducted a detailed couple analysis of the tank, including the attached piping, to determine tank stability at both a 75 percent and 100 percent filled with water condition. The report, completed on December 8, 2010, determined that the tank would withstand a design basis faulted event. Regional specialist inspectors reviewed the evaluation and generated questions that have been asked of the licensee concerning the analysis. At the conclusion of the inspection period the inspectors and the licensee were continuing discussions regarding the seismic stability of the SLC test tank. Pending the results of additional discussions and additional information, this will remain open as an unresolved item (URI). |
| Site: | Perry  |
|---|---|
| Report | IR 05000440/2010005 Section 4OA2 |
| Date counted | Dec 31, 2010 (2010Q4) |
| Type: | URI: |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71152 |
| Inspectors (proximate) | M Marshfield D Reeser B Palagi M Phalen J Cameron P Voss C Scott T Hartman P Smagacz |
| INPO aspect | |
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Finding - Perry - IR 05000440/2010005 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Perry) @ 2010Q4
Self-Identified List (Perry)
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