islands and (2) identify those islands or atolls where additional sampling and analysis may be required (Robison et al., 1981a). A dose assessment was made based on the limited data from the screening survey to determine the dose people living on Rongelap Island would receive between 1978 and 2050 (Robison et al., 1982). Estimates of the dose Rongelap inhabitants received from 1957 through 1978 were reported by Lessard et al. (Lessard et al., 1980a). Since the 1978 survey, we have collected and analyzed additional samples from Rongelap Atoll. This has resulted in an extensive expansion of the data base for both Rongelap and Kabelie Islands. In 1985, the Rongelap people w@re relocated to an island at Kwajalein Atoll remain today. In this report we uge data from the 1978 NMIRS and the larger ampuntof data developed from sampling trips to Rangelap Atoll from 1986 through 1993, to estimate the dose resettle on Rongelap Atoil. The doses are calculated resettlement date of 1995. As noted below, we also have and have found useful data from for example, those done by the Washington (LRE) in 1959 and 1961 Gessel, 1985). dssuming a Had access to eaglier surveys, Exposure Pathways The radiological dose to inhabitants at a contaminated atoll occurs from both external and internal exposure. Each of these two categories can be broken down further into the following exposure pathways: (1) External Exposure A. Natural Background Radiation B. Nuclear-Test-Related Radiation (2) Internal Exposure A. Natural Background Radiation B. Nuclear-Test-Related Radiation 1. Radionuclides in Terrestrial Foods 2. Radionuclides Inhaled 3. Radionuclides in Marine Foods 4. Radionuclides in Drinking Water The aboveinternal exposure pathways are listed in descending order of their contribution to the total estimated radiological dose at the atolls (Robison et al., 1987). The terrestrial foods are of importance because of the uptake of 157Cs by vegetation; these foods account for about 60% of the total estimated effective dose The dose from the external gamma path way is also primarily due to 137Cs. Consequen , about 95% of the total estimated effective do 5% of the total estimated effective vary at different atolls and islands The external natural backgro exposure in the northern Marshall is 3.5 wR ho! or 0.22 mSv y-! (22 mr cosmic radiation. The external bac due to terrestrial radiation is ve low in the Marshall Islands. The internal efféctive dose is about 2.2 mSv y—! (220 mrem y-) for natural occurring radionuclides such as }0-Potassium (40K), 210-Polonium (21°Po), afd 210-Lead (210Pp), that result from consumptidn of local and imported foods. The natural background dose is not included in the doses presented in this paper unless specifically stated. __ Data Bases External Exposure Measurements The external exposure rates at Rongelap and Ailinginae Atolls were measured by EG&G as part of the aerial survey conducted in the 1978 NMIRS (Tipton and Meibaum, 1981). The average exposure rate on Rongelap Island as measured by EG&G in 197@ was about 45 uR h-l. The EG&G external exposure contours for 137Cs are shown in Fi 1. In 1988, we made a series of extefnal gamma measurements at the two atolls with our in-situ