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10 CFR Part 50, Appendix B, Criterion V, I … 10 CFR Part 50, Appendix B, Criterion V, Instructions, Procedures, and Drawings, requires, in part, that activities affecting quality shall be prescribed by documented instructions, procedures, or drawings, of a type appropriate to the circumstances and shall be accomplished in accordance with these instructions, procedures, or drawings. Contrary to the above, procedure OP-KW-NOP-FH-003, Reactor Cavity Draining With Fuel or Upper Internals Installed, prescribed instructions for draining of the refueling cavity, in order to refill the refueling water storage tank in preparation for making the emergency core cooling system operable. However, the procedure was not appropriate to the circumstances because it did not prescribe that if procedure NSP-SI-004, Monitoring SI System for Void After System Refill, was performed prior to the cavity draining to the RWST, that procedure NSP-SI-004 shall be re-performed to ensure the emergency core cooling system was free from voids, which could impact availability of the system. Consequently, on April 24, 2012, the licensee performed NSP-SI-004 and ensured the system was free of voids to ensure SI system availability and then completed draining of the refueling cavity to the refueling water storage tank in the emergency core cooling system. The system was not monitored for voids following the refueling water storage tank refill and on June 27, 2012, during the normally scheduled surveillance to perform testing to ensure the system was free of voids, the licensee discovered a 2.8 cubic-foot void near the common suction of the SI pumps. The performance deficiency was determined to be more than minor because it was associated with the Mitigating Systems Cornerstone attribute of configuration control and affected the Cornerstone objective of ensuring the reliability, and capability of systems that respond to initiating events to prevent undesirable consequences. The risk associated with this issue was determined to be of very low safety significance (Green) because the finding was a deficiency affecting the qualification of a mitigating system and the system was operable but nonconforming. The licensee conducted full scale tests of the system, which demonstrated that the system was available with the gas void present for all accident conditions. The licensee entered this issue into the CAP as CR480150, Gas Void in SI Pump Suction Piping, conducted and apparent cause evaluation and shared the operating experience with the industry.he operating experience with the industry.

Discovered date

23:59:59, 30 June 2013 +

Docket

05000305 +

Event date

23:59:59, 30 June 2013 +

Finding integer

2 +

Finding type

Non-cited violation +

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Identified by

Licensee-identified +

Inspection report

IR 05000305/2013003 +

Inspector

Caroline Tilton +, Kenneth Riemer +, Alan Dahbur +, Joseph Mancuso +, Kevin Barclay +, Valerie Myers + and Robert Krsek +

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>.

15:47:34, 30 May 2018 +

Person