05000334/FIN-2008502-01
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Finding | |
|---|---|
| Title | Licensee-Identified Violation |
| Description | 10 CFR 50.54(q) requires licensees to follow and maintain in effect an emergency plan which meets the standards of 10 CFR 50.47(b). The Beaver Valley Power Station Emergency Plan states that emergency action level values are based upon criteria established under NUMARC/NESP-007, Methodology for Development of Emergency Action Levels. In March and October 2006 FENOC made changes to the Unit 1 and Unit 2 emergency action levels (EALs), respectively, as a result of the units extended power up-rates. The licensee used calculation package 10080- UR(B)-507, Containment High Range Radiation Area Monitor Readings Due to LOCA With Various Source Terms Addresses Alternative Source Terms and Power Up-rate, to revise area radiation monitor thresholds in the EAL fission product barrier matrix. In making the changes, the licensee committed two separate errors. The first error was that the values for the containment radiation monitors listed under the Fuel Cladding Barrier (EAL 1.1.6) were taken from the wrong table in the calculation package, and this affected both Units. The second error was an incorrect mathematical conversion that involved the threshold for Significant Radioactivity in Containment (EAL 1.3.5), which only affected Unit 2. Upon discovery of this error, in April, 2008, the licensee took immediate action to correct the related EAL radiation values and issued CR 08-38146, which initiated a root cause evaluation and a technical evaluation to understand what redundant EAL thresholds may have been exceeded before the affected EAL 1.1.6 and 1.3.5 thresholds. The inspector determined that the errors associated with these EAL parameters were mathematical in nature and were of very low safety significance because they would not have delayed the declaration of any event, due to redundant EALs. |
| Site: | Beaver Valley |
|---|---|
| Report | IR 05000334/2008502 Section 4OA7 |
| Date counted | Sep 30, 2008 (2008Q3) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Licensee-identified |
| Inspection Procedure: | |
| Inspectors (proximate) | D Silk S Barr J Commiskey D Spindler J Trapp R Berry |
| INPO aspect | |
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Finding - Beaver Valley - IR 05000334/2008502 | |||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Beaver Valley) @ 2008Q3
Self-Identified List (Beaver Valley)
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