05000454/FIN-2010003-02
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Finding | |
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| Title | Inadequate Evaluation of Shim Pack for the Upper Steam Generator Lateral Supports |
| Description | The inspectors identified a finding of very low safety significance and associated Non-Cited Violation of 10 CFR Part 50, Appendix B, Criterion III, Design Control, for the inadequate design evaluation of the shim packs for the Upper Steam Generator Lateral Supports. Specifically, the licensees calculations failed to demonstrate that the stresses in the shims and the concrete met the acceptance criteria. The licensee entered the issue into the CAP as IR 1068066 to revise the design basis calculations. The finding is more than minor because it was associated with the Mitigating Systems Cornerstone attributes of Design Control and Equipment Performance and affected the cornerstone objective of ensuring the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences. The finding is of very low safety significance because it was a design qualification deficiency confirmed not to result in the loss of operability or functionality. This finding is not assigned a cross-cutting aspect because it is not reflective of current licensee performance due to its age. (Section 1R15.b) |
| Site: | Byron  |
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| Report | IR 05000454/2010003 Section 1R15 |
| Date counted | Jun 30, 2010 (2010Q2) |
| Type: | NCV: Green |
| cornerstone | Initiating Events, Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.15 |
| Inspectors (proximate) | T Bilik B Metrow D Jones T Go V Meghani R Skokowski J Bishop R Ng C Thompson B Bartlett J Robbins B Jose |
| INPO aspect | |
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Finding - Byron - IR 05000454/2010003 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Byron) @ 2010Q2
Self-Identified List (Byron)
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