05000260/FIN-2015004-04
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Finding | |
|---|---|
| Title | Failure to Properly Manage Risk During Planned Maintenance Activities |
| Description | A self-revealing NCV of Technical Specifications (TS) 5.4.1.a was identified for the licensees failure to use appropriate maintenance procedures to ensure appropriate system start functions worked after maintenance activities on the 2A Residual Heat Removal (RHR) Pump breaker. Specifically, the licensees failure to follow procedure MAI-3.3, Cable Terminating and Splicing for Cables Rated up to 15000 Volts resulted in the loose lead in the 2A RHR pump breaker. The licensees immediate corrective actions were to properly tighten the terminal screw. The issue has been entered into the licensees CAP as CR 1040950. The performance deficiency was more than minor because it was associated with the Human Performance attribute of the mitigating systems cornerstone and adversely affected the cornerstone objective to ensure the availability, reliability, and capability of the Unit 2 RHR system to respond to events and prevent undesirable consequences. Specifically, the failure to retighten a terminal screw in the 2A RHR pump breaker resulted in the 2A RHR pump being unable to be started from the control room. The inspectors characterized the finding using IMC 0609, Appendix A, Significance Determination Process, Exhibit 2, Mitigating Systems. The inspectors determined the finding screened as very low safety significance (Green) because the finding did not represent an actual loss of function of at least a single Train for greater than its Tech Spec Allowed Outage Time. The finding does not represent an immediate safety concern because the automatic functions of the RHR pump were not lost and manual starts were available from the 4kV shutdown board. The cause of the finding was directly related to the cross-cutting aspect of Procedure Adherence due to the individuals failing to follow their work instructions. (H.8) |
| Site: | Browns Ferry  |
|---|---|
| Report | IR 05000260/2015004 Section 4OA3 |
| Date counted | Dec 31, 2015 (2015Q4) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Self-revealing |
| Inspection Procedure: | IP 71153 |
| Inspectors (proximate) | A Ruh D Dumbacher D Roberts R Baldwin T Stephen |
| Violation of: | Technical Specification - Procedures Technical Specification |
| CCA | H.8, Procedure Adherence |
| INPO aspect | WP.4 |
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Finding - Browns Ferry - IR 05000260/2015004 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Browns Ferry) @ 2015Q4
Self-Identified List (Browns Ferry)
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