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The inspectors identified a finding of ver … The inspectors identified a finding of very low safety significance with an associated NCV of 10 CFR 50, Appendix B, Criterion III, Design Control. Specifically, the licensee failed to demonstrate the residual heat removal heating, ventilation, and air conditioning (RHRHVAC) system would be able to maintain a required minimum temperature of 40 degrees Fahrenheit (F) for the emergency diesel generator (EDG) fuel oil storage tank (FOST) rooms under minimum design conditions, potentially rendering the EDGs inoperable. The licensee entered this issue into the corrective action program and revised the operator rounds procedure to record ambient air temperature readings in the EDG FOST rooms on a daily basis when the outside ambient air temperature is below 45F. The performance deficiency was of more than minor safety significance because a failure to correctly incorporate design requirements into plant procedures has the potential to lead to a more significant safety concern if left uncorrected. Specifically, since the EDG FOST rooms were unmonitored and a subsequent calculation demonstrated the RHRHVAC system was not able to maintain the minimum required temperature in the rooms as described in the design basis, the EDGs could have been rendered inoperable without the licensees knowledge. The finding was determined to be of very low safety significance since it affected the design or qualification of a mitigating structure, system, or component (SSC), for which the SSC maintained its operability or functionality. The inspectors concluded that because this condition has existed for greater than three years, this issue would not be reflective of current licensee performance and no cross-cutting aspect was identified.nd no cross-cutting aspect was identified. +

Discovered date

23:59:59, 31 March 2016 +

Docket

05000341 +

Event date

23:59:59, 31 March 2016 +

Finding integer

6 +

Finding type

Non-cited violation +

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Identified by

NRC identified +

Inspection procedure

IP 71111.15, Operability Determinations and Functionality Assessments +

Inspection report

IR 05000341/2016001 +

Inspector

Billy Dickson +, Brian Kemker +, Phillip Smagacz + and Jim Nance +

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>.

12:56:16, 25 September 2017 +

Person

Billy Dickson +, Brian Kemker +, Phillip Smagacz + and Jim Nance +

2016Q1 +

Green +

Fermi +

23:59:59, 31 March 2016 +

System