05000220/FIN-2009005-01
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Finding | |
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| Title | Two APRMs Inoperable Contrary to Procedure Requirement |
| Description | A self-revealing non-cited violation (NCV) of Technical Specification (TS) 604, Procedures, was identified when Unit 1 operators removed average power range monitor(APRM) 18 from service for maintenance while APRM 14 was inoperable due to a detector malfunction, contrary to a prerequisite of the APRM 18 maintenance procedure. Operators did not use a readily available control room indication of APRM 14, which showed that the instrument was malfunctioning, when verifying that it was operable. As immediate corrective action, APRM 14 was placed in bypass. The failed local power range monitor (LPRM) input that was causing the malfunction was identified and placed in bypass, and APRM 14 was returned to service. The issue was entered into the corrective action program (CAP) as condition report (CR) 2009-7943.The finding was more than minor because it was associated with the equipment performance attribute of the Mitigating Systems cornerstone and affected the cornerstone objective to ensure the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences. The finding was of very low safety significance because it was not a design or qualification deficiency, did not represent a loss of a system/train safety function, and did not screen as potentially risk significant due to external events. The finding had a cross-cutting aspect in the area of human performance, work practices, because operators did not utilize all available information when verifying that APRM 14 was operable, and thereby did not satisfy a procedure requirement prior to proceeding with the APRM 18 maintenance activity (HA.b per IMC 0305). |
| Site: | Nine Mile Point  |
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| Report | IR 05000220/2009005 Section 1R13 |
| Date counted | Dec 31, 2009 (2009Q4) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Self-revealing |
| Inspection Procedure: | IP 71111.13 |
| Inspectors (proximate) | J Caruso G Johnson D Dempsey J Furia G Dentel E Knutson M Schneider M Balazik A Rao |
| CCA | H.8, Procedure Adherence |
| INPO aspect | WP.4 |
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Finding - Nine Mile Point - IR 05000220/2009005 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Nine Mile Point) @ 2009Q4
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