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Columbia Generating Station Operating Lice … Columbia Generating Station Operating License, Condition 2.C(14), requires, in part, that the licensee shall implement and maintain in effect all provisions of the approved fire protection program as described in section 9.5.1 and Appendix F of the FSAR for the facility. Columbia Generating Station FSAR, Appendix F, Fire Protection Evaluation, section F.4.4.4, Detailed Fire Hazard Analysis by Area, states, in part, for the main control room (Fire Area RC-10), a design basis fire will be confined to the fire area and systems needed for post-fire safe shutdown will remain free of fire damage. Contrary to the above, prior to February 24, 2014, the licensee failed to implement and maintain in effect all provisions of the approved fire protection program as described in Appendix F of the FSAR. Specifically, because of unfused DC ammeters in the main control room, the licensee failed to ensure that for a design basis fire, the fire will be confined to Fire Area RC-10 and that the systems needed for post-fire safe shutdown will remain free of fire damage. This finding was identified by the licensee and entered in the licensees corrective action program as AR 303326 and AR 304147. A senior reactor analyst performed a detailed risk evaluation and determined that the associated change to the core damage frequency was approximately 3.8E-7. The change to the large early release frequency was approximately 5E-8/year. Therefore, the finding was of very low safety significance (Green). The dominant core damage sequences involved a control room fire initiating event in Panel P-800, loss of Division I and Division II emergency AC power sources, and failure of the high pressure core spray system (failure of either the diesel or pump). The Division II emergency diesel generator failed because of secondary fires. The ability to recover the Division I emergency diesel generator at the remote shutdown panel helped to minimize the risk.hutdown panel helped to minimize the risk. +

Discovered date

23:59:59, 30 June 2014 +

Docket

05000397 +

Event date

23:59:59, 30 June 2014 +

Finding integer

8 +

Finding type

Non-cited violation +

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Identified by

Licensee-identified +

Inspection report

IR 05000397/2014003 +

Inspector

L Ricketson +, Bernadette Baca +, Nick Taylor +, Paul Elkmann +, Jeremy Groom +, Dan Bradley + and Dustin Reinert +

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>.

15:50:06, 30 May 2018 +

Person