05000483/FIN-2012003-02
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Finding | |
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| Title | Failure to Declare Component Cooling Water Train A Inoperable Due to Voids |
| Description | The inspectors reviewed a self-revealing non-cited violation of 10 CFR 50, Appendix B, Criterion V, involving the licensees failure to properly assess the operability of component cooling water train A when voids were recognized during a post-maintenance run. On March 19, 2012, when component cooling water pump A was started following maintenance, a large void was discovered in the system. Operators diagnosed that voids had been introduced into the system during the restoration of the spent fuel pool train A heat exchanger. Operators declared the system operable based on seeing pump flows and current readings return to normal values; however, several hours later, the licensee discovered that voids were still present in the system and declared the system inoperable. After extensive venting, the licensee declared the system operable based on an acceptable, measurable quantity of voiding in the system. This issue was entered into the licensees corrective action program as Callaway Action Request 201203506. Failure to fully assess a degraded condition before declaring component cooling water system train A operable was a performance deficiency. This finding is more than minor because it is associated with the human performance attribute of the Mitigating Systems Cornerstone and affected the associated cornerstone objective to ensure the availability, reliability, and capability of systems to respond to initiating events. Using Manual Chapter 0609.04, Phase 1 - Initial Screening and Characterization of Findings, this finding was determined to be of very low safety significance because it did not create a loss of system safety function of a single train for greater than the technical specification allowed outage time and did not affect seismic, flooding, or severe weather initiating events. This finding has a cross-cutting aspect in the area of problem identification and resolution associated with the operating experience component because the licensee failed to institutionalize operational experience through changes to station processes, procedures and training programs to support plant safety. |
| Site: | Callaway  |
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| Report | IR 05000483/2012003 Section 1R15 |
| Date counted | Jun 30, 2012 (2012Q2) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Self-revealing |
| Inspection Procedure: | IP 71111.15 |
| Inspectors (proximate) | C Brown C Baron N O'Keefe J Chiloyan A Stone T Hartman E Sanchez Z Hollcraft N Makris K Clayton D Dumbacher A Dunlop R Langstaff |
| CCA | P.5, Operating Experience |
| INPO aspect | CL.1 |
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Finding - Callaway - IR 05000483/2012003 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Callaway) @ 2012Q2
Self-Identified List (Callaway)
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