05000282/FIN-2012007-02
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Finding | |
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| Title | Failure to Perform Maintenance Rule Evaluations After Discovering Degraded Radiation Monitors |
| Description | The inspectors identified an unresolved item regarding the failure to perform maintenance rule evaluations after discovering degraded conditions on four separate radiation monitors. Due to the missing evaluations, the inspectors were unable to determine whether the radiation monitor system had been appropriately evaluated under the maintenance rule as required by 10 CFR 50.65. On July 15, 2010, the licensee initiated AR 1241216 to document that radiation monitor 1RM-48 was reading downscale. During the screening of this AR, the licensee assigned an individual to complete an apparent cause evaluation to determine the cause of the downscale condition. The licensee also assigned a maintenance rule evaluation to determine whether the condition of the radiation monitor constituted a maintenance rule functional failure as defined by 10 CFR 50.65. Two days later, the licensee initiated AR 1241453 to document that several radiation monitors (including 1RM-48) were adversely impacted during the installation of a new R-11 radiation monitor. During the screening of this corrective action document, the licensee determined that an apparent cause evaluation was not needed since the poor design of the radiation monitor cabinetry, combined with the installation of new wires amongst older wires, had caused the adverse impacts. In addition, the screening team approved the cancellation of the apparent cause and maintenance rule evaluations assigned as part of AR 1241216 based upon the information contained in AR 1241453. The inspectors reviewed the assignment cancellation information and agreed that the apparent cause evaluation was not needed. However, the maintenance rule evaluation was needed to determine whether additional maintenance rule related actions were required. The inspectors questioned licensee personnel to determine whether a maintenance rule evaluation was completed for the equipment issue discussed in AR 1241216. The licensee informed the inspectors that the maintenance rule evaluation had not been completed. In addition, maintenance rule evaluations for the three other radiation monitors (2RM-48, 2R-71, and R-41) discussed in AR 1241453 were not performed. The licensee documented the failure to perform the maintenance rule evaluations as AR 1347349. The maintenance rule evaluations were ongoing at the conclusion of the inspection. As a result, this issue will be considered unresolved pending the inspectors review of the maintenance rule evaluations and a determination of whether the failures should have resulted in the radiation monitoring system being classified as an a(1) maintenance rule system |
| Site: | Prairie Island  |
|---|---|
| Report | IR 05000282/2012007 Section 4OA2 |
| Date counted | Sep 30, 2012 (2012Q3) |
| Type: | URI: |
| cornerstone | Other |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71152 |
| Inspectors (proximate) | D Mcneil N Shah K Riemer K Stoedter E Sanchez-Santiagod Mcneilk Riemer T Bilik C Moore M Phalen R Baker K Stoedter D Passehl J Laughlin K Barclay M Jones M Learn J Beavers D Oliver |
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Finding - Prairie Island - IR 05000282/2012007 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Prairie Island) @ 2012Q3
Self-Identified List (Prairie Island)
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