05000247/FIN-2010004-01
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Finding | |
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| Title | Reactor Trip Breaker Preventative Maintenance Procedure was not Adequately Implemented |
| Description | A self-revealing NCV of 10 CFR 50, Appendix B, Criterion V, Instructions, Procedures and Drawings, was identified because Entergy personnel did not adequately implement the preventive maintenance (PM) procedure for the B reactor trip breaker (RTB).Specifically, on March 10, 2009, Entergy staff did not adequately implement PM Procedure 0-BRK-401-ELC, Westinghouse, Reactor Trip and Bypass Circuit Breaker (DB-50), which resulted in the inoperability of the B RTB shunt trip device function on July 5, 2010. Entergy personnel took immediate corrective actions to replace the B RTB and its associated fuse block assembly. This issue was entered into Entergy\\\'s corrective action program as condition report (CR)-IP2-201 0-4451. This finding is more than minor because it is associated with the equipment performance attribute of the Mitigating Systems cornerstone and affects the cornerstone objective of ensuring the availability and reliability of systems that respond to initiating events to prevent undesirable consequences (Le. core damage). Specifically, inadequate preventive maintenance contributed to the failure of the shunt trip device function of the B RTB. Using IMC 0609.04, Phase 1 - Initial Screening and Characterization of Findings, the finding was determined to have very low safety significance (Green) because the finding did not result in a loss of system safety function because the undervoltage coil was operable; there was not an actual loss of safety function of a single train for greater than its technical specification allowed outage time; and the issue was not potentially risk significant due to a seismic, flooding, or severe weather initiating event. The finding has a cross-cutting aspect in the area of problem identification and resolution associated with the corrective action program attribute of complete and accurate identification of issues. Specifically, Entergy staff performing preventive maintenance did not identify and communicate RTB conditions completely and accurately such that the B RTB conditions were fully identified in the CAP. |
| Site: | Indian Point  |
|---|---|
| Report | IR 05000247/2010004 Section 1R19 |
| Date counted | Sep 30, 2010 (2010Q3) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.19 |
| Inspectors (proximate) | B Bickett H Gray J Nicholson M Catts M Gray O Ayegbiso |
| CCA | P.1, Identification |
| INPO aspect | PI.1 |
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Finding - Indian Point - IR 05000247/2010004 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Indian Point) @ 2010Q3
Self-Identified List (Indian Point)
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