05000306/FIN-2011004-01
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Finding | |
|---|---|
| Title | Radiation Monitors Not Fully Scoped Into or Assessed by the Maintenance Rule Program |
| Description | The inspectors identified a finding of very low safety significance and a NCV of 10 CFR 50.65 due to the licensees failure to demonstrate that the performance or condition of the Unit 1 and Unit 2 radiation monitors was effectively controlled through the performance of appropriate preventive maintenance. As a result, the licensee failed to establish goals or monitor the performance of these monitors in accordance with paragraphs (a)(1) and (a)(2) of 10 CFR 50.65. In addition, the licensee also failed to scope radiation monitors used in the emergency operating procedures into the maintenance rule as required by 10 CFR 50.65 (b)(2)(i). The licensee initiated corrective action documents, CAPs 1303302 and 1304984, for these issues. The licensees corrective actions included reviewing radiation monitoring information to ensure that all applicable radiation monitors were included in and assessed by the maintenance rule program. The inspectors determined that this issue was more than minor because actual radiation monitor failures had occurred to the extent that the performance or condition of the monitors was not being effectively controlled through the completion of maintenance. This finding was also associated with the equipment performance attribute of the Mitigating Systems Cornerstone and impacted the cornerstone objective of ensuring the availability, reliability and capability of systems that respond to initiating events to prevent undesirable consequences. The inspectors determined that this finding was of very low safety significance because each of the questions provided in IMC 0609, Attachment 0609.04, Table 4a, could be answered No. This issue was determined to be cross-cutting in the Human Performance, Decision Making area, because the licensee did not appropriately validate their underlying assumptions when determining which radiation monitors needed to be included in the maintenance rule. |
| Site: | Prairie Island  |
|---|---|
| Report | IR 05000306/2011004 Section 1R12 |
| Date counted | Sep 30, 2011 (2011Q3) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.12 |
| Inspectors (proximate) | C Zoia D Betancourt J Beavers J Giessner K Stoedter M Phalen N Feliz Adorno P Cardona Morales P Elkmann P Zurawski S Shah V Meghani |
| CCA | H.14, Conservative Bias |
| INPO aspect | DM.2 |
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Finding - Prairie Island - IR 05000306/2011004 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Prairie Island) @ 2011Q3
Self-Identified List (Prairie Island)
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