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The team identified a finding of very-low … The team identified a finding of very-low safety significance (Green) and an associated NCV of 10 CFR Part 50, Appendix B, Criterion III, Design Control, for the failure to verify the capability to manually throttle safety-related motor-operated valves (MOVs) during a DBA. Specifically, the licensee did not verify that the protective devices would allow manually throttling safety-related MOVs during a DBA without tripping. The licensee captured this issue in their CAP as CARD 16-26763, performed a preliminary protective device evaluation to reasonably determine the maximum number of throttling cycles each MOV can incur without tripping the associated thermal overload, and incorporated these limits into an operations night order. The performance deficiency was determined to be more-than-minor because it was associated with the Mitigating Systems cornerstone attribute of design control and affected the cornerstone objective of ensuring the availability, reliability, and capability of mitigating systems to respond to initiating events to prevent undesirable consequences. The finding screened as of very-low safety significance (Green) because it did not result in the loss of operability or functionality of mitigating systems. Specifically, the licensee performed informal analyses to evaluate the installed protective devices for the throttling MOVs and reasonably determined that tripping would not occur. The team determined that the associated finding had a cross-cutting aspect in the area of Human Performance because work groups did not communicate and coordinate their activities within and across organizational boundaries to ensure nuclear safety is maintained. Specifically, the engineers that performed the affected calculation, which was approved on December 2013, did not communicate and coordinate with operations or the MOV engineer to determine if the plant had throttling MOVs that required additional analysis.ng MOVs that required additional analysis. +

Discovered date

23:59:59, 30 September 2016 +

Docket

05000341 +

Event date

23:59:59, 30 September 2016 +

Finding integer

3 +

Finding type

Non-cited violation +

Has query"Has query" is a predefined property that represents meta information (in form of a <a rel="nofollow" class="external text" href="https://www.semantic-mediawiki.org/wiki/Subobject">subobject</a>) about individual queries and is provided by <a rel="nofollow" class="external text" href="https://www.semantic-mediawiki.org/wiki/Help:Special_properties">Semantic MediaWiki</a>.

PA.3 +

IR 05000341/2016007 +

Inspector

M Jeffers +, G Gardner +, R Fernandes +, G Nicely +, N Valos +, Benny Jose +, Nestor Feliz-Adorno +, Jamie Benjamin +, Randy Baker + and Vance Petrella +

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>.

00:55:41, 21 February 2018 +

Person

M Jeffers +, G Gardner +, R Fernandes +, G Nicely +, N Valos +, Benny Jose +, Nestor Feliz-Adorno +, Jamie Benjamin +, Randy Baker + and Vance Petrella +

2016Q3 +

Green +

Fermi +

23:59:59, 30 September 2016 +

Title

Failure to Verify the Ability to Manually Throttle Safety-Related MOVs during a DBA +

Violation of

10 CFR 50 Appendix B, Quality Assurance Criteria for Nuclear Power Plants and Fuel Reprocessing Plants + and 10 CFR 50 Appendix B Criterion III, Design Control +

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