July 1, 1997

On February 10, 1997, a Savannah River Site F-Canyon crane process operator (the CRANE OPERATOR) submitted a routine, semi-annual bioassay sample which was analyzed in April as positive for plutonium. The CRANE OPERATOR’s prior routine sample submitted on August 4, 1996, had been analyzed as negative. It was therefore concluded the CRANE OPERATOR had been internally contaminated between August 4, 1996, and February 10, 1997.