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95137 NINE MILE POINT 1 28853 05-26-95 POW LICENSEE: NIAGARA MOHAWK POWER CORP. SITE: .NINE MILE POINT 1 . EN NUMBER:28853 DOCKET: 05000220 EVENT DATE: 05-26-95 RX TYPE: BWR EVENT TIME: 00:00 VENDORS: GE-2 NOTIFY DATE: 05-26-95 EMERGENCY CLASS: N/A REGION: 1 STATE: NY TIME: 13:42 OPS OFFICER: CHAUNCEY GOULD 10 CFR SECTION: CCCC 21.21 UNSPECIFIED PARAGRAPH UNIT SCRAM RX INIT INITIAL MODE CURR CURRENT MODE CODE CRIT PWR PWR 1 N Y 100 POWER OPERATION 100 POWER OPERATION A WYLE LAB REPORT RESULTED IN THE CALCULATION OF A NON-CONSERVATIVE SERVICE LIFE, AND CONSEQUENTLY A NON-CONSERVATIVE CHANGE-OUT FREQUENCY WAS ESTABLISHED FOR VARIOUS AGASTAT GP RELAYS. THE WYLE LAB REPORT STATED THAT VARIOUS AGASTAT GP SERIES RELAYS HAD A SERVICE LIFE OF 26.3 YRS WHICH NIAGARA MOHAWK HAD IMPLEMENTED IN THEIR PROCEDURES. THE REPORT USED AN ACTIVATION ENERGY, FOR CALCULATING THE LIFE OF THE RELAY BOBBIN MATERIAL, WHICH WAS HIGHER THAN WHAT THEY SHOULD HAVE USED FOR THAT MATERIAL. IF THEY HAD USED THE LOWER MORE CONSERVATIVE VALUE, THE SERVICE LIFE OF THE RELAYS WOULD HAVE BEEN LESS. WITH THIS CONDITION EXISTING, THERE WAS A POTENTIAL FOR THE CORE SPRAY SYSTEM BECOMING INOPERABLE WITH THE FAILURE OF THESE RELAYS. IMMEDIATE CORRECTIVE ACTION WAS TO REPLACE THE SUBJECT AGASTAT GP RELAYS. COPY OF REPORT WAS FAXED TO V. HODGE.
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