05000263/FIN-2009005-04
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Finding | |
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Title | Licensee-Identified Violation |
Description | Title 10 CFR 50, Appendix B, Criterion III, Design Control, requires, in part, that measures shall be established to assure that the design basis is correctly translated into procedures. Contrary to this requirement, the licensee did not assure that a critical dimensional parameter (moment arm length) for AO-2896 (outboard torus nitrogen vent valve) was correctly prescribed in Procedure 4321-PM, Primary Containment T-Seated Butterfly Valves. Because Procedure 4321-PM did not incorporate moment arm length information documented in calculation CA-03-022, Air Operated Valve Component Calculation, Primary Containment, Vent & Purge Valves, Revision 2, the valve was found to have a non-conservative moment arm length on October 28, 2009. After the issue was identified during calculation review, the licensee entered the issue into their corrective action program as CAP 01204645. The licensee declared AO-2896 inoperable until the valve moment arm length could be adjusted. The inspectors applied IMC 0609, Attachment 4, Phase 1 Initial Screening and Characterization of Findings to this finding. Using the Table 4a worksheet, the inspectors answered No to Questions 1, 2, and 4. Because the inspectors determined that the finding did not represent an actual open pathway in the physical integrity of reactor containment (Question 3), the finding was determined to be of very low safety significance (Green) |
Site: | Monticello |
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Report | IR 05000263/2009005 Section 4OA7 |
Date counted | Dec 31, 2009 (2009Q4) |
Type: | NCV: Green |
cornerstone | Mitigating Systems |
Identified by: | Licensee-identified |
Inspection Procedure: | |
Inspectors (proximate) | P Smagacz J Corujo-Sandin K Riemer D Reeser M Garza S Thomas M Bielby L Haeg P Zurawski T Go J Bozga |
INPO aspect | |
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Finding - Monticello - IR 05000263/2009005 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Monticello) @ 2009Q4
Self-Identified List (Monticello)
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