05000498/FIN-2016001-03
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Finding | |
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| Title | Licensee-Identified Violation |
| Description | Technical Specification 6.8.1.a. states, in part, written procedures shall be established, implemented, and maintained covering the applicable procedures recommended in Regulatory Guide 1.33, Revision 2, Appendix A, February 1978. Regulatory Guide 1.33, Appendix A, Section 9.a requires, in part, that maintenance that can affect the performance of safety-related equipment should be performed in accordance with written procedures, documented instructions, or drawings appropriate to the circumstance. The licensee established procedure 0PMP04-ZG-0022, Hills McCanna/Rockwell/Edwards Ball Valve Maintenance, Revision 24, to meet the Regulatory Guide 1.33 requirement for rebuilding chemical and volume control system (CVCS) mixed bed demineralizer drain valve CV-123A, a safety-related valve. Step 5.10 of this procedure directs stem seals to be installed during bonnet reassembly. Contrary to the above, on October 26, 2015, the licensee failed to follow Step 5.10 that directs stem seals to be installed during bonnet reassembly. Specifically, the stem seals were installed in the wrong locations and, on November 13, 2015, resulted in a 12-15 gpm RCS leak rate when the CVCS mixed bed demineralizer 1A was placed in service. A search for the leak determined that CV-123A was leaking by due to the lower stem seals being improperly installed. The licensee restored compliance by correctly rebuilding valve CV-123A, demineralizer 1A drain valve, in accordance with the approved procedure. The finding was of very low safety significance because the finding did not affect other systems used to mitigate a LOCA resulting in a loss of their function. This issue was entered into the licensees corrective action program as Condition Report 15-25192. |
| Site: | South Texas  |
|---|---|
| Report | IR 05000498/2016001 Section 4OA7 |
| Date counted | Mar 31, 2016 (2016Q1) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Licensee-identified |
| Inspection Procedure: | |
| Inspectors (proximate) | A Sanchez B Tripathi E Simpson L Brookhart N Hernandez N Taylor |
| Violation of: | Technical Specification - Procedures Technical Specification |
| INPO aspect | |
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Finding - South Texas - IR 05000498/2016001 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (South Texas) @ 2016Q1
Self-Identified List (South Texas)
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