05000454/FIN-2009004-05
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Finding | |
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| Title | Unresolved Technical Concerns on Design of Seismic Restraint on FHB Crane Trolley |
| Description | A URI was identified by the inspectors for their incomplete review of the design documents related to the FHB crane upgrade to single failure proof. Specifically, not all of the licensees design and modification documents required to complete the inspection were complete at the conclusion of the inspection. The licensee performed the following calculations to demonstrate that the crane trolley seismic design is in accordance with ASME NOG-1-2004. 36272-02; Exelon/Byron and Braidwood Hoist Reeving Equipment Calculation; 36272-12; Exelon/Byron and Braidwood Single Failure Proof Trolley Seismic Analysis; 36272-13; Exelon/Byron and Braidwood Single Failure Proof Trolley Critical Weld Calculations; and 36272-17; Exelon/Byron and Braidwood Single Failure Proof Trolley Misc. Item Seismic Analysis. At conclusion of the inspections, the licensee had not completed all the necessary design activities and there were open technical concerns regarding adequacy of the seismic restraint evaluated in Calculation 36272-12 as described in Section 4OA5.1.b(1), Inadequate Seismic Restraint on Fuel Handling Building Crane Trolley. In addition, resolution of the open technical concern regarding use of friction to limit seismic loads, as described in Section 4OA5.1.b (2), Use of Friction in Seismic Analysis..., may impact some of the above calculations. All revised calculations from those listed above and any new design documents including calculations and modifications issued to resolve these technical concerns will need to be reviewed. This issue will be a URI pending the inspectors reviews of the licensees design documents demonstrating resolution of the technical concerns identified during the inspection (URI 05000454/2009004-05; 05000455/2009004-05) |
| Site: | Byron  |
|---|---|
| Report | IR 05000454/2009004 Section 4OA5 |
| Date counted | Sep 30, 2009 (2009Q3) |
| Type: | URI: |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | |
| Inspectors (proximate) | R Jickling R Ng C Thompson B Bartlett J Robbins J Cassidy E Duncan M Learnj Pearsonj Bozga R Skokowski M Learn E Love C Tilton G Morell R Ng C Thompson B Bartlett J Robbins J Cassidy M Mitchell J Neurauter D Jones S Bakhsh T Go V Meghani |
| INPO aspect | |
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Finding - Byron - IR 05000454/2009004 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Byron) @ 2009Q3
Self-Identified List (Byron)
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