05000346/FIN-2010008-05
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Finding | |
|---|---|
| Title | Technical Specification (TS) Leakage Requirements |
| Description | The team reviewed the root cause analysis of the event and RCS leakage data from previous operating cycles, and concluded that the equipment failure (cracked CRDM nozzles) could not have been avoided or detected by the licensees quality assurance program or other related control measures. Therefore, the team concluded that a licensee performance deficiency did not exist for this violation and did not apply to the Significance Determination Process as described in IMC 0609. Although, a quantitative risk-evaluation was not completed, the licensee performed a deterministic evaluation of the safety significance for the PWSCC identified in the CRDM nozzles (Reference LER 05000346/2010-002-00). Because the PWSCC sizes identified in the CRDM nozzles were well below the crack size that would challenge structural integrity and there was no discernable head wastage, the licensee concluded that this issue was of very low safety significance. The team agreed with the licensees assessment that this issue was of very low safety significance. |
| Site: | Davis Besse  |
|---|---|
| Report | IR 05000346/2010008 Section 4OA3 |
| Date counted | Sep 30, 2010 (2010Q3) |
| Type: | Violation: Severity level Enforcement Discretion |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71153 |
| Inspectors (proximate) | T Bilik J Rutkowski A Wilson D Hills A Shaikh C Nove J Collins M Holmberg J Jandovitz |
| INPO aspect | |
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Finding - Davis Besse - IR 05000346/2010008 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Davis Besse) @ 2010Q3
Self-Identified List (Davis Besse)
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