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The following finding that affects 10 CFR … The following finding that affects 10 CFR 50.48 was identified by the NRC and is a violation of NRC requirements. This finding has been screened and determined to warrant enforcement discretion per the Interim Enforcement Policy Regarding Enforcement Discretion for Certain Fire Protection Issues as described in the NRC Enforcement Policy. The inspectors identified an Unresolved Item (URI) during an NRC fire protection inspection in 1998 associated with a failure to adequately modify circuits for several Motor Operated Valves (MOVs). The inspectors determined that the licensee did not ensure that the MOVs would not be actuated by fire-induced hot shorts in the control room, bypassing their torque and limit switches as described in Information Notice 92-18, Potential for Loss of Remote Shutdown Capability During a Control Room Fire. The inspectors reviewed the Palisades licensing basis for the fire protection program, recent industry guidance and NRC documents related to fire induced circuit failures and determined that the finding was a violation of 10 CFR Part 50, Appendix R, Section III.G.3. Subsequent to the 1998 inspection the licensee began transition to 10 CFR 50.48(c) (National Fire Protection Association (NFPA) 805). Therefore, the licensee completed a risk-assessment evaluation (EA-PSA-FIRE-06-03, Owners Review of Use of the Palisades PSA to Evaluate the Importance of MOV Hot Shorts, Revision 0) for this issue to determine if it would qualify for enforcement discretion. The inspectors reviewed the evaluation and did not agree with some of the evaluation assumptions. Since the finding affected multiple MOVs, the inspectors performed a qualitative assessment for each valve separately in accordance with IMC 0609, Appendix F, Fire Protection Significance Determination Process, and determined that the finding was not associated with a finding of high safety significance (i.e., less than Red).safety significance (i.e., less than Red). +

Discovered date

23:59:59, 31 March 2012 +

Docket

05000255 +

Event date

23:59:59, 31 March 2012 +

Finding integer

6 +

Finding type

Finding +

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Identified by

NRC identified +

Inspection Manual Chapter

NRC Inspection Manual 0609/Appendix F +

Inspection report

IR 05000255/2012002 +

Inspector

D Betancourt +, M Bielby +, A Scarbeary +, K Walton +, Dariusz Szwarc +, John Ellegood +, Alan Dahbur +, Chuck Zoia + and Thomas Taylor +

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>.

21:43:23, 8 October 2017 +

NRC information notice

Information Notice 92-18 +

Person