the development of an updated radiation dose assessment and an estimate of the risks associated with the predicted human exposure. In April, Greenhouse began to summarize external exposure rate data for the Micronesian islands outside of the Northern Marshalls. Much of this data was collected in collaboration with Nelson of UWLRE during 1975 and 1976. During the summer months Kaplan, an undergraduate student versitv, and Lessard performed the initial from Yale Uni- analysis relating I-129 activity ia soil to acute thyroid dose equivalents in persons on Rongelap and Utirik Atol- ls in Mareh 1954. The analysis accounted for I-129 atom distribution with depth of soil and the kinetic relationships between the itodine isotopes, time post detonation and fission neutron energy. ferences in uptake, the individual. The dosimetry accounted for dif- excretion and retention of iodine as a function of age of Preliminary estimates of thyroid dose from the March 1, 1954 exposure were determined for Rongelap and Utirik residents. During July and August 1980, whole-body counts and urine samples were obtained at Majuro Atoll and Kili Island by Greenhouse, Moorthy, Watts and Rivera of BNLSEP. Former Bikini Island residents and a comparison population contributed approximately 200 spectra and 100 urine samples. the April 1978 population at Bikini were recounted. Fifty percent of Consecutive measurements of a Bikini residents body burden post departure allowed for computation of individual long-term biological removal rate constants. This data was re- vieved and written up by Miltenberger, Lessard and Greenhouse and submitted to a scientific journal. Ia September, a meeting of RUDR was held between Bond, Borg, Conard, Cronkite, Hull, Lessard, Meinhold, Miltenberger and Naids of BNL, and Sondhaus 17