Title 10 of the Code of Federal Regulations Part 50, Appendix B, Criterion III, Design Control, requires, in part, that measures be established to assure that applicable regulatory requirements and the design basis, for structures, systems, and components are correctly translated into specifications, drawings, procedures, and instructions. Contrary to the above, the licensee failed to adequately translate the design and licensing basis requirements of the Callaway
high energy line break analysis into equipment specifications for valve FBV0146. Specifically, the licensee failed to provide adequate specifications or procedural guidance to maintain this valve in its required position and as such, valve FBV0146 was found open on December 15, 2009. Valve FBV0146 is required to be maintained closed to prevent subjecting safety related equipment to the harsh environments following a postulated
high energy line break. Following discovery by the licensee that valve FBV0146 was out of the required position, the licensee closed the valve and implemented interim measure to maintain the valve closed. This finding was entered in the licensees corrective action program as Callaway Action Requests 200910313. This finding is greater than minor because it was associated with the design control attribute of the
mitigating systems cornerstone and adversely affected the cornerstone objective to ensure the availability, reliability, and capability of systems that respond to
initiating events to prevent undesirable consequences. This finding is of very low safety significance because it was not a design or qualification deficiency resulting in a loss of operability or functionality, did not represent a loss of system safety function for greater than its Technical Specification allowed outage time, did not result in an actual loss of safety function of non-technical specification risk significant equipment for greater than
24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />, and did not screen as risk significant due to a seismic, flooding, or severe weather initiating event.
