05000281/FIN-2014003-01
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Finding | |
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| Title | Inadequate Amount of Packing in Pressurizer Spray Valve |
| Description | A self-revealing NCV of Surry Technical Specification (TS) 6.4.A.7 was identified because 2-RC-PCV-2455A, the Unit 2 A pressurizer (PZR) spray valves packing gland was repacked with the incorrect number of packing rings in May, 2008. When the Unit 2 A PZR spray valve bellows failed in March 2014, the amount of packing in the valve was insufficient to prevent packing leakage. This leakage approached the technical specification (TS) allowable unidentified reactor coolant system (RCS) leak rate on March 19, 2014, and subsequently required an unplanned unit shutdown. The issue was documented in Surrys corrective action program (CAP) as CR 542547. The failure of the licensees packing control program to list the correct number of packing rings in the packing control form for the repack of 2-RC-PCV-2455A, the Unit 2 A PZR spray valve, was a performance deficiency that was within the licensees ability to foresee and correct. Specifically, the licensee did not thoroughly evaluate decreasing the number of packing rings from five to four when packing control was shifted from the PZR safety valve overhaul procedure to the licensees Packing Control Program. As a consequence of the inadequate number of packing rings, the Unit 2 A PZR spray valve experienced a packing leak that approached the TS allowable unidentified RCS leak rate on March 19, 2014, which subsequently required an unplanned shutdown of Unit 2. The inspectors determined that the performance deficiency was more than minor because it was associated with the procedural quality attribute of the Initiating Events Cornerstone and adversely affected the cornerstone objective to limit the likelihood of events that upset stability and challenge critical safety functions during shutdown as well as power operations. Specifically, an incorrect number of packing rings listed on the packing control form eventually allowed packing leakage to approach the TS limit. Using Manual Chapter 0609.04, Initial Characterization of Findings, Table 2, dated June 19, 2012; the finding was determined to affect the Initiating Events Cornerstone. The inspectors screened the finding using Manual Chapter 0609, Appendix A, Significance Determination Process (SDP) for Findings at- Power dated June 19, 2012, and determined that it screened as Green because the deficiency did not cause a loss of mitigation equipment relied upon to transition the plant to a stable shutdown condition. Because the PD occurred outside of the nominal three-year period for present performance, no cross-cutting aspect has been assigned. |
| Site: | Surry  |
|---|---|
| Report | IR 05000281/2014003 Section 1R12 |
| Date counted | Jun 30, 2014 (2014Q2) |
| Type: | NCV: Green |
| cornerstone | Initiating Events |
| Identified by: | Self-revealing |
| Inspection Procedure: | IP 71111.12 |
| Inspectors (proximate) | A Nielson A Vargas Mendezc Dykes C Jones J Nadel K Roche M King P Mckenna R Carrion R Kellner |
| Violation of: | Technical Specification - Procedures Technical Specification |
| INPO aspect | |
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Finding - Surry - IR 05000281/2014003 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Surry) @ 2014Q2
Self-Identified List (Surry)
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