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Technical Specification 6.8.1.a. states, i … 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.tion program as Condition Report 15-25192. +

Discovered date

23:59:59, 31 March 2016 +

Docket

05000498 + and 05000499 +

Event date

23:59:59, 31 March 2016 +

Finding integer

3 +

Finding type

Non-cited violation +

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Identified by

Licensee-identified +

Inspection report

IR 05000498/2016001 +

Inspector

Eric Simpson +, B Tripathi +, Nick Taylor +, Lee Brookhart +, Alfred Sanchez + and Nicholas Hernandez +

Modification date"Modification date" is a predefined property that corresponds to the date of the last modification of a subject and is provided by <a rel="nofollow" class="external text" href="https://www.semantic-mediawiki.org/wiki/Help:Special_properties">Semantic MediaWiki</a>.

15:54:08, 30 May 2018 +

Person