05000331/FIN-2013002-06
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Finding | |
|---|---|
| Title | Average Power Range Monitor Condition Prohibited by Technical Specifications |
| Description | A finding of very low safety significance and associated non-citied violation of Technical Specification (TS) 3.3.1.1, Reactor Protection System (RPS) Instrumentation, Required Action A, was self-revealed on December 1, 2012, for the licensees failure to place inoperable average power range monitors (APRMs) C and D in trip within 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />. Specifically, the licensee failed to identify a failed mode switch contact for local power range monitor (LPRM)32-25A that rendered Surveillance Requirement (SR) 3.3.1.1.8 not met for periods when APRMs C and/or D were in service between November 27 and December 1, 2012; a condition prohibited by TS. The licensee entered the issue into the corrective action program (CAP) as condition report (CR) 01828842. Immediate corrective actions included bypassing APRMs C and D on December 1, 2012, bypassing LPRM 32-25A, and repairing the failed mode switch. Additional corrective actions included revisions to plant operating instructions to require removal of LPRMs from service if they are found to not be tracking with other LPRMs in service. The inspectors determined that failing to properly evaluate the APRM operability impact of LPRM 32-25A indications on November 27, 2012, represented a performance deficiency because it was the result of the licensees failure to meet a TS requirement, and the cause was reasonably within the licensees ability to foresee and correct and should have been prevented. The performance deficiency was determined to be more than minor and a finding because, if left uncorrected, failing to properly evaluate the operability of APRMs would have the potential to lead to a more significant safety concern. The inspectors applied IMC 0609.04, Initial Characterization of Findings, to this finding. Because the inspectors answered No to questions A through E in Table 3, the inspectors referenced IMC 0609, Appendix A, The Significance Determination Process (SDP) for Findings At-Power. Because the inspectors answered No to the applicable Section B (Transient Initiators) question under Exhibit 1 (Initiating Events Screening Questions) and No to applicable questions 1-3 under Section C (Reactivity Control Systems) of Exhibit 2 (Mitigating Systems Screening Questions), the finding screened as very low safety significance (Green). The inspectors determined that the performance characteristic of the finding that was the most significant causal factor of the performance deficiency was associated with the cross-cutting aspect of Human Performance, having Decision Making components, and involving the licensee making safety-significant decisions using a systematic process, especially when faced with uncertain or unexpected plant conditions, to ensure safety is maintained. Specifically, decisions regarding the operability impact of the degraded LPRM 32-35A indications were not made using the systematic operability evaluation procedure or other formal processes to include interdisciplinary input and reviews of the decision. |
| Site: | Duane Arnold  |
|---|---|
| Report | IR 05000331/2013002 Section 4OA3 |
| Date counted | Mar 31, 2013 (2013Q1) |
| Type: | NCV: Green |
| cornerstone | Initiating Events |
| Identified by: | Self-revealing |
| Inspection Procedure: | IP 71153 |
| Inspectors (proximate) | J Corujo Sandin L Haeg R Murray S Bell B Orlikowski |
| Violation of: | Technical Specification - Procedures Technical Specification |
| CCA | H.13, Consistent Process |
| INPO aspect | DM.1 |
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Finding - Duane Arnold - IR 05000331/2013002 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Duane Arnold) @ 2013Q1
Self-Identified List (Duane Arnold)
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