4.2 Internal Dose - Lawrence Livermore National Laboratory Lawrence Livermore attacked the problem by determining what went into the body by ingestion and inhalation (picocuries per day), and then applying appropriate factors to such input (exposure) to obtain the dose in rem. Theparticular ones I have used are given in Table 4.2 #1. The major uncertainty of the "input" method lies in the diet--no one knows precisely what it is, although several attempts have been made to define it. DOE-1982 used the BNL community B diet, i.e., one involving a greater amount of food and also a greater input of contaminated food (Note 8). Naidu et al (1980) who originally described it commented that the diet represented prepared, not eaten food, and that in fact it was more than a person could eat. This results in overestimation of dose. The Lawrence Livermore group that used it for dose calculations concurred, The 1978 specific activities measured by the Livermore team were made on 21 samples of coconut, 5 of Pandanus, 1 of breadfruit, 1 chicken, 2 pigs and 98 fish, on the whole a barely adequate number (Robison et al, 198la, 1982b). In 1986, however, that Laboratory took for analysis more than 75 samples of coconut, more than 10 of breadfruit and some others; the results were in agreement with the earlier ones, and a summary of all data is shown in Table 4.2 #1, calculated for 1990. Since the Rongelap people have expressed doubt about the reliability and honesty of Department of Energy scientists (e.g., those from Brookhaven and Livermore), a comparison trial was carried out in December 1987 in which samples collected at Rongelap and Ailinginae in the presence of Senator Anjain and others were divided among several laboratories for analysis (Livermore, Bremen, Neuherberg (Munich) and Berkeley). The results demonstrated agreement (Note 9). Cesium. I am taking 3,400 pci/d (in 1990) as the exposure due to cesium-137, based on a total for foods listed in Table 4.2 #2 plus a 10% allowance for a miscellaneous variety of others (Note 8, Table #1). The whole-body, red marrow and bone surface doses are just about equal, 1.26 rem (Table 4.2 #1). Strontium. The strontiua-90 estimates for 1990 are based on the 1978 samples; I have been unable to learn how much more work has been done since then. I am therefore taking 21.8 pCi/d based on field samples plus a 25% increment for other miscellaneous foods. The total exposure is 27.3 pCi/d. The 30-year doses are: whole-body, .025 rem; red marrow, .137 rem; bone surfaces, .300 rem. (Scaled back to 1978, they would be 33% more.) 27