05000528/FIN-2011003-10
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Finding | |
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Title | Licensee-Identified Violation |
Description | Technical Specification 3.3.9, Control Room Essential Filtration Actuation Signal (CREFAS), requires one CREFAS channel to be operable in Mode 6 or during movement of irradiated fuel assemblies. If both channels are inoperable, Condition C of Technical Specification 3.3.9 requires operators to immediately place one CREFS train in operation or immediately suspend movement of irradiated fuel. Contrary to this requirement, on April 8, 2011, after CREFAS train B failed while train A was out of service during the Unit 2 refueling outage, plant personnel identified that Unit 2 operators failed to immediately suspend movement of irradiated fuel and failed to ensure that one CREFS train was realigned to the essential filtration mode required for post-accident emergency alignment. Operators took immediate action to properly align the CREFS. The licensee entered the issue into the corrective action program as CRDR 36889366. The finding is of very low safety significance because it only represented a degradation of the radiological barrier function of the control room. |
Site: | Palo Verde |
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Report | IR 05000528/2011003 Section 4OA7 |
Date counted | Jun 30, 2011 (2011Q2) |
Type: | NCV: Green |
cornerstone | Mitigating Systems |
Identified by: | Licensee-identified |
Inspection Procedure: | |
Inspectors (proximate) | G Guerra R Lantz M Brown P Elkmann G George J Adams J Bashore M Baquera S Hedger |
INPO aspect | |
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Finding - Palo Verde - IR 05000528/2011003 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Palo Verde) @ 2011Q2
Self-Identified List (Palo Verde)
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