05000458/FIN-2011004-03
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Finding | |
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Title | Licensee-Identified Violation |
Description | Title 10 CFR Part 50, Appendix B, Criterion XVI, Corrective Action, states, in part, that measures shall be established to assure that conditions adverse to quality, such as failures, malfunctions, deficiencies, deviations, defective material and equipment, and nonconformances are promptly identified and corrected. Contrary to these requirements, the licensee took incomplete measures to ensure the completion of slow turbine rolls to remediate the air voiding in the lube oil system of the reactor core isolation cooling turbine. On April 17, 2010, operations reported a low oil level in both sight glasses of the reactor core isolation cooling turbine. The investigation attributed the cause of the low oil level as a failure to perform a slow roll on the reactor core isolation cooling turbine following system maintenance. On February 10, 2011, during the plant start-up from refueling outage 17, station management canceled the work order to perform the slow roll of the reactor core isolation cooling turbine following lube oil system maintenance, resulting in air accumulating in the lube oil system. The finding was considered to be of very low safety significance (Green) because it was not a design or qualification deficiency; did not represent either a loss of system safety function, an actual loss of safety function of a single train, or an actual loss of safety function; and did not screen as potentially risk significant due to a seismic, flooding, or severe weather initiating event. The issue has been entered into the licensees corrective action program as Condition Report CR-RBS-2010-03854. |
Site: | River Bend |
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Report | IR 05000458/2011004 Section 4OA7 |
Date counted | Sep 30, 2011 (2011Q3) |
Type: | NCV: Green |
cornerstone | Mitigating Systems |
Identified by: | Licensee-identified |
Inspection Procedure: | |
Inspectors (proximate) | L Ricketson B Baca A Barrett R Hagar G Larkin V Gaddy C Alldredge |
INPO aspect | |
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Finding - River Bend - IR 05000458/2011004 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (River Bend) @ 2011Q3
Self-Identified List (River Bend)
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