1) the dietary intake of 1376, was a major component contributing to the committed effective dose equivalent for the years after the initial contamination of the atolls, 2) for persons whose diet included fish, 6575 was a major component of committed effective dose equivalent during the first years post return, 3) a decline in the daily activity ingestion rate greater than that : . : : 137 65 resulting from radioactive decay of the source was estimated for Cs, Zn, 90. and 6000, 4) the relative impact of each nuclide on the estimate of committed effec- tive dose equivalent was dependent upon the time interval between initial contamination and rehabitation, and 5) the internal committed effective dose equivalent exceeded the external dose equivalent by a factor of 1.1 at Utirik and 1.5 at Rongelap during the rehabitation period. : Few reliable 23 9 py Measurements on human excreta were made. . An analysis of the tentative data leads to the conclusion that a reliable estimate of commit- Wo ted effective dose equivalent requires further research. 147