05000348/FIN-2011002-02
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Finding | |
|---|---|
| Title | Licensee-Identified Violation |
| Description | 10 CFR 50 Appendix B, Criterion XVI, states in part, that measures shall be established to assure conditions adverse to quality, such as failures, malfunctions, deficiencies, deviation, defective material and equipment and non-conformances are promptly identified and corrected. Contrary to the above, the licensee failed to take timely corrective actions to properly address dual indications experienced on multiple occasions. In 2004, and again in 2005, failures occurred where the Unit 2 valves had dual position indication after a demanded position during surveillance testing. In 2007, the licensee recognized the need to make the Unit 1 and Unit 2 valves position limit switch seated, instead of torque switch seated, to correct the dual position indication problem. The licensee implemented minor design changes on all six valves to accomplish this corrective action. During the implementation of the corrective action, the licensee failed to adjust the torque switch settings to provide sufficient margin between the limit switch seating value and the torque switch seating value. In 2008 and 2009, the licensee again experienced instances of dual position indication on these valves. In July 2009, the licensee created WOs to adjust the torque switch settings to ensure an appropriate limit to minimizing the potential for dual indication-type closing stroke results. The licensee entered this condition in its CAP as CR 2010110828. This finding was assessed using IMC 0609, Phase 1 screening worksheets of Attachments 4 and Appendix H relating to Containment Barrier Integrity, and determined to be of very low safety significance (Green), because the valve passed its local leak rate test, and would not have allowed the entire volume of containment to exit through the opening within a 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> period. |
| Site: | Farley  |
|---|---|
| Report | IR 05000348/2011002 Section 4OA7 |
| Date counted | Mar 31, 2011 (2011Q1) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Licensee-identified |
| Inspection Procedure: | |
| Inspectors (proximate) | E Crowe S Shaeffer A Vargas J Sowa |
| INPO aspect | |
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Finding - Farley - IR 05000348/2011002 | ||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Farley) @ 2011Q1
Self-Identified List (Farley)
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