05000454/FIN-2012005-02
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Finding | |
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| Title | |
| Description | A finding of very low safety significance (Green) and an associated NCV of 10 CFR Part 50, Appendix B, Criterion V, Instructions, Procedures, and Drawings, was self revealed when the 1B SX pump tripped when a motor lug failed as a result of an inadequate motor maintenance procedure. Specifically, Work Order (WO) 525476-02, Unit 2 ESW [Essential Service Water] Pump 2SX01PB Remove Existing Motor and Install Rebuilt Motor, contained instructions to de-terminate the motor leads to the 1B SX pump motor, but failed to specify the removal of bus bars, which subsequently damaged the motor cables and motor lug during shipment for motor refurbishment. The licensee entered this issue into their CAP as IR 1414688. Corrective actions included replacing the failed motor termination lug, reterminating the remaining two lugs on the 1B SX pump motor, initiating the replacement of lugs on the remaining SX pump motors, adding steps in work instructions to de-terminate motor termination lugs when removing the SX pump motors for preventive maintenance, and checking similar motor leads on other systems for similar issues. The inspectors determined that the performance deficiency was more than minor because it was associated with the Human Performance and Design Control attributes of the Mitigating Systems Cornerstone and adversely affected the cornerstone objective of ensuring the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences (i.e. core damage). The inspectors determined that because the finding was not a deficiency affecting the design or qualification of a mitigating SSC, was not a loss of the system or function, did not represent an actual loss of function of at least a single train of safety-related equipment for greater than its TS allowed outage time, and did not represent a loss of function of one or more non-TS trains of equipment designated as high safety significance, this finding was of very low safety significance (Green). This finding did not have a cross-cutting aspect as it was not indicative of current licensee performance. |
| Site: | Byron  |
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| Report | IR 05000454/2012005 Section 1R15 |
| Date counted | Dec 31, 2012 (2012Q4) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Self-revealing |
| Inspection Procedure: | IP 71111.15 |
| Inspectors (proximate) | A Shaikh B Bartlett C Moore C Sanders C St . Petersc Thompson E Sanchez J Gilliam J Laughlin J Robbins N Feliz Adorno R Ng R Walton T Daun T Go |
| INPO aspect | |
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Finding - Byron - IR 05000454/2012005 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Byron) @ 2012Q4
Self-Identified List (Byron)
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