05000346/FIN-2013003-02
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Finding | |
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| Title | Evaluation of Out of Service Status and Change in Flow Rates in Flow Rates on Permanently Installed Radiation Monitors |
| Description | Inspectors selected containment high-range monitors and reviewed the calibration documentation since the last inspection. The inspectors assessed whether an electronic calibration was completed for all range decades above 10 rem/hour and whether at least one decade at or below 10 rem/hour was calibrated using an appropriate radiation source. The inspectors assessed whether calibration acceptance criteria were reasonable, accounted for the large measuring range and the intended purpose of the instruments. The inspectors selected two effluent/process monitors that were relied on by the licensee in its emergency operating procedures as a basis for triggering emergency action levels and subsequent emergency classifications, or to make protective action recommendations during an accident. The inspectors evaluated the calibration and availability of these instruments. The inspectors reviewed the licensees capability to collect high-range, postaccident iodine effluent samples. As available, the inspectors observed electronic and radiation calibration of these instruments to assess conformity with the licensees calibration and test protocols. No findings were identified. One unresolved item (URI) concerning permanently installed radiation monitoring instrumentation was identified by the inspectors. The inspectors identified that radiation monitors RE-1878B (Liquid Radioactive Waste Effluent Miscellaneous); RE-1822B (Waste Gas Decay System), and RE-1770 A and B (Liquid Radioactive Waste Effluent) had been out of service for extended times over the past several years. These radiation monitors impact both the Offsite Dose Calculation Manual and the Emergency Preparedness (EP) Program. Compensatory actions were in place when these radiation monitors were out of service. Radiation monitor RE-4598 Channel 1 had its calculated flow rate changed 142,000cfm to the 110,000cfm (refer to licensee CR 2011-04083). This change in calculated follow rate impacted the radiation monitors alert and alarm set-point values, and had the potential to impact the radiation monitors EP emergency action level threshold values. The inspectors have categorized this issue as unresolved, pending completion of an evaluation of the adequacy of the compensatory actions for the out of service radiation monitors specific to the Offsite Dose Calculation Manual and the EP emergency action levels threshold values. Additionally, the inspectors will review the impact of the change in calculated flow rate for radiation monitor RE-4598 Channel 1 specific to the EP emergency action level threshold values. (URI 05000346/2013003-02). |
| Site: | Davis Besse  |
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| Report | IR 05000346/2013003 Section 2RS5 |
| Date counted | Jun 30, 2013 (2013Q2) |
| Type: | URI: |
| cornerstone | Or Safety |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71124.05 |
| Inspectors (proximate) | C Moore D Kimble J Cameron J Laughlin J Neurauter M Bielby M Marshfield M Mitchell T Brileyj Cameronp Smagacz T Briley J Steffes S Bell M Phalen D Kimble J Laughlin |
| INPO aspect | |
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Finding - Davis Besse - IR 05000346/2013003 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Davis Besse) @ 2013Q2
Self-Identified List (Davis Besse)
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