BROOKHAVEN NATIONAL ASSOCIATED IABOR,4TORY UNIVERSITIES, INC Upton, Long Island New York 11973 410008 Safety & Environmental (5~6) 282\ FTS 666/ Protection Division R August 8, 4250 1984 . Dr. William Bair Battelle Pacific Northwest Laboratories Battelle Boulevard 99352 Richland, Washington Dear Dr. Bair: We are delighted that you have been asked to look at our Marshall Islands It is preliminary programs. I am forwarding the information you requested. and subject to further refinement. The Bikini urine was collected at Kili Island. Since this locution us relatively unaffected by the testing program, contamination by dust was unlikely. The photon-electron rejecting alpha liquid scintillation spectroscopy (PERALS) was developed by Jack McDowell at Oak Ridge National Laboratory (ORNL). We used this system at Brookhaven National Laboratory (BNL; to estimate Pu. The following is a brief outline of the proc ‘~re we used to analyze che Bikini urine samples obtained two years after t’ne Bi’KiIIiZIS evacuated Bikini Atoll. The samples were urine from males (see Table One) and were composite into a total of eleven liters. Ten liters were divided into ten one-liter samples and five of these were analyzed by the PERALS method at BNL . Another five were analyzed by the PERALS m ~~~;d and by elecro-deposition techniques at ORNL. One liter was analyzed for “ ‘he virtually the same for all samples which were measured for 536;;; ‘as The BNL samples were usually analyzed in groups of four. Each ;roup consisted of one chemical blank, one known standard sample and two ~rine samples. A chemical blank was used to measure background radioactivity in all of the chemicals added. A stan$~~d sample consisted of the chemical blank to which we added 20 to 50 fCi of Pu. We used a standard sample to estimate recovery and to reassure ourselves that the f~$~-energy p~ac of the standard Pu spectra corresponded to channels assigned to ●