ABSTRACT External exposure rate surveys from 1975 to 1977 on the islands Nam, Eneu and Bikini of Bikini Atoll gave average external exposure rates of 24, 5.7 and 32 wR/hr respectively. The exposure rate on Eneu Island is uniform, whereas those on Bikini and Nam range from 7.0 to 80. UR/hr. Based on an assumed living pattern at Bikini Island, the adult male Bixinian is estimated to be in the pres- ence of an external radiation field corresponding to 16 UR/hr due to debris and fallout from the 1954 BRAVO incident. lent of 2.8 rem. This corresponds to a 30 year dose equiva- - iii -