31 In the case of the transuranics, the background of the probldm is worth mention. The quantity of plutonium-239 in the urine is minyte, being something like .1 to 1 x 10-* picocuries/liter. It has only been during the past several years that the Brookhaven group has felt qble to do accurate determinations using the new fission track method. M@re than 250 Rongelap samples have been analyzed, but none of these has be@n reviewed with respect to the history of the donor, i.e., age, perjod of residence on island, occupation, etc., owing to the fact that support for the project terminates this year. At my request, to provide some orientation to this problem, fhe Brookhaven Laboratory gave Dr. Lessard the time for a brief survey. From a random sample of 35 determinations, the median urinary output wis found to be about .03 x 10-3 picocuries/day, equivalent to a dietary consumption of .13 pci/day (Note 7). However, the exceptionally proad distribution of the individual determinations calls for a detaile—l review which might reveal technical error, but could equally well point [fo hitherto unresolved or unsuspected physiological factors that influence the results. The 30-year doses associated with a median urinary output off .03 x 10-3 pCi/day of plutonium-239 are: .0074 rem; bone surfaces, .092 rem; whole-body, .0051 rem; liver, .017 rem. red marrow, The addition to these of the doses for plutonium~240 and of americium-241, which measured, would increase them by perhaps a factor of two. rere not The Brookhaven results may be summarized as follows: 30-year dose Whole-body Cesium-137: Strontiun-90: Plutonium-239 Plutonium-~240 Americium-241/ External dose: ** Total: * Not including inhalation ek Estimated -620 ren -021 -005 « .005 59 . 1.24 1978-2008* Red marrow -620 rem 110 007 « .007 59 rem 1.33 rem | The Brookhaven group summarized its results by calculating 50-year dose from 1957 to 2008 (Lessard et al 1984c), based on a curve fytted to the observations from 1959 (?) to 1980, then extrapolating back fo 1957 and forward to 2008 (Note 7, Tables #2 and #3). Adding up the agnual doses thus obtained gives a total of .66 rem (external + internal, but not including transuranics or inhalation).