Browse wiki

Technical Specification 3.3.2, Table 1, En … Technical Specification 3.3.2, Table 1, Engineered Safety Feature Actuation System Instrumentation, function 6.g., requires, in part, two operable channels of auxiliary feedwater actuation upon trip of all main feedwater pumps in modes 1 and 2. There is no specified required action for two inoperable channels, so limiting condition for operation 3.0.3 is applicable. Limiting condition for operation 3.0.3 requires action to be initiated within 1 hour to place the plant in mode 3 in 7 hours. Contrary to the above, on January 20, 2010, Wolf Creek identified that at various times, the actuation logic function 6.g. for auxiliary feedwater had been inoperable and that the licensee had failed to initiate action within 1 hour to place the unit in mode 3 in 7 hours. Specifically, the actuation logic could not be made up with one main feedwater pump operating and the second main feedwater pump secured and reset. This condition occurred during unit startups and shutdowns. This finding was entered in the licensees corrective action program as Condition Report 23008. Using Inspection Manual Chapter 0609.04, Phase 1 Initial Screening and Characterization of Findings, the issue screened to a Phase 2 significance determination because it involved an actual loss of safety function. A Phase 2 significance determination using the pre-solved worksheet from the Risk Informed Inspection Notebook for Wolf Creek Generating Station, determined the finding was of very low safety significance (Green) because this feature was not credited in the plants safety analysis and the auxiliary feedwater safety function was still available.water safety function was still available. +

Discovered date

23:59:59, 31 March 2011 +

Docket

05000482 +

Event date

23:59:59, 31 March 2011 +

Finding integer

12 +

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>.

Hours

1.157407e-5 d (2.777778e-4 hours, 1.653439e-6 weeks, 3.805e-7 months) + and 8.101852e-5 d (0.00194 hours, 1.157407e-5 weeks, 2.6635e-6 months) +

Identified by

Licensee-identified +

Inspection Manual Chapter

NRC Inspection Manual 0609.04 +

Inspection report

IR 05000482/2011002 +

Inspector

Geoffrey Miller +, G Guerra +, A Fairbanks +, C Long +, Brian Tindell +, Louis Carson +, Dustin Reinert +, Charley Peabody +, Casey Alldredge + and Casey Smith +

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>.

15:42:15, 30 May 2018 +

Person