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Report date | Site | Event description | |
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05000416/LER-2002-002 | 27 June 2002 | Grand Gulf | During the performance of Residual heat Removal/Low Pressure Coolant Injection System RHR/LPCI-"A" (BO) quarterly functional test in accordance with procedure 06-OP-1E12-Q-0023 it was noted that RHR-A System pressure was higher than normal (approximately 80 psig total pressure). A Investigation of this abnormality revealed that this pressure had existed since the system was last "filled and vented" on April 18, 2002 following maintenance on the system. The pressure source was determined to be P11 (Condensate & Refueling Water Storage and Transfer System) which is used during the "fill and vent" procedure. E12F044A (See "A" in the attached RHR Figure) was found not fully seated which admitted P11 to the system. This valve is an inboard Primary Containment Isolation Valve (PCIV) for penetration 20. The valve was immediately torqued closed upon discovery (April 29, 2002). Technical Specification Limiting Condition of Operation (LCO) 3.6.1.3 states, "Each PCIV shall be OPERABLE". The term Operable/Operability is defined as, "A system, subsystem, division, component, or device shall be OPERABLE or have OPERABILITY when it is capable of performing its specified safety functions(s)". A Based on review of this event, E12F044A was considered inoperable for about 11 days. Therefore, this event is reportable and a 60-day LER is required. |