Part 21 Report - 1995-219
GENERAL ELECTRIC 29535 11-01-95 OTH
LICENSEE: GENERAL ELECTRIC
SITE: .GENERAL ELECTRIC . EN NUMBER:29535
DOCKET: EVENT DATE: 11-01-95
RX TYPE: EVENT TIME: 00:00
VENDORS: NOTIFY DATE: 11-01-95
EMERGENCY CLASS: N/A REGION: 4 STATE: CA TIME: 09:22
OPS OFFICER: JOSEPH SEBROSKY
10 CFR SECTION: CCCC 21.21 UNSPECIFIED PARAGRAPH
GENERAL ELECTRIC IS ISSUING A PART 21 REPORT DUE TO IMPROPER
VALVE PACKING MATERIAL USED IN VALVES THAT WERE SUPPLIED TO THE
PILGRIM NUCLEAR POWER PLANT.
GE NUCLEAR ENERGY (GE-NE) BOUGHT (FROM RING-O VALVE SpA OF ITALY)
AND PROVIDED (TO THE BOSTON EDISON COMPANY PILGRIM PLANT) FOUR
GATE VALVES INTENDED FOR SAFETY-RELATED APPLICATIONS (TWO IN THE
HPCI SYSTEM AND TWO IN THE RWCU SYSTEM). AS PART OF THE VALVE
DELIVERY IMPROPER VALVE PACKING BUSHINGS WERE SUPPLIED WHICH
CONTAINED BABBITT, A LEAD BEARING ALLOY WHICH IS KNOWN TO CAUSE
EMBRITTLEMENT IN STAINLESS STEEL. THIS DID NOT MEET THE GE-NE
VALVE SPECIFICATION.
THE IMPROPER MATERIAL WAS IDENTIFIED DURING THE INSTALLATION
PERIOD, AND THE BUSHINGS WERE REPLACED WITH BUSHINGS CONTAINING
AN ACCEPTABLE MATERIAL. THE VALVES WERE NOT YET PLACED INTO
NUCLEAR SERVICE AT THE TIME OF DISCOVERY. GE-NE HAS EVALUATED THE
SAFETY SIGNIFICANCE OF THE IMPROPER BUSHING MATERIAL IN ALL FOUR
VALVES AND HAS CONCLUDED THAT FOR THE VALVES IN THE HPCI SYSTEM,
A SIGNIFICANT SAFETY CONCERN DID NOT EXIST. HOWEVER GE-NE
ENGINEERING HAS NOT BEEN ABLE TO CONCLUSIVELY RULE OUT THE
POSSIBILITY THAT THE POTENTIAL CONSEQUENCES OF HAVING THIS
MATERIAL IN THE RWCU SYSTEM WOULD NOT RESULT IN A SUBSTANTIAL
SAFETY CONCERN AND HAS, THEREFORE, ELECTED TO REPORT THIS UNDER
10 CFR PART 21. GE-NE HAS NOT SUPPLIED THIS VALVE TO ANY OTHER
NUCLEAR POWER PLANT TO DATE.
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