Saint-Gobain Performance Plastic located in Hoosick, NY, said that they are missing two 500 millicurie
Kr-85 thickness
gauges (500 millicuries in 1967, half life 10.4 years) from their Saint-Gobain Performance Plastic company in New Haven,
CT, which was closed in late 2003 or early 2004. The
Kr-85 thickness
gauges license number is 20-01382-02 (license expired in 1994 and were licensed through LFE Industrial System Corp.). Caller stated that the
krypton thickness
gauges were not licensed through the State of
New York but to
CT which is an NRC non-agreement state. On 09/26/05 the two
krypton thickness
gauges were discovered missing while putting together an ionizing radiation report for the State of
CT for the radioactive materials that were located in their New Haven facility. The two
krypton thickness
gauges were made by LFE Tracer Units (now known as
EGS Gauging located in MA) and each contained 500 millicures of
Kr-85 as of 1967. Based on a total of activity 1000 millicuries for the two
Kr-85 thickness
gauges at the end of 1968 as of 2005 the total activity of the two thickness
gauges would be around 85 millicuries (37years, half life 10.4 years). Model number of the two
gauges are S-6A and their serial numbers are 24A & T9A.