. . ,!, 4.2 Internal Dose - Lawrence Liveraore National Laboratory Lawrence Livernore 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 t~e dose in rem. The particular ones I.have used are given in Table 4.2 #l. Ingestion. The major uncertainty lies in the diet--no one knows precisely wfit it is, although several attempts have been made to defiae it.~ DOE-198Z’used the BNL community B diet, i.e., one involving a greater anoun~of food and also a greater input of contaminated food (Not’&=llL--lTaid=e&al.(1980) who originally described it commented that the diet represented prepar<4Fnot-eaten. food,.and.that in fact it.was ........... J, more than a person could eat. This results in overestimation of dose. ff %-*” ><* ~ 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, 1981a, 1982b). In 1986, however, that Laboratory took additional samples (Robison 1988), and in 1987 this reassessment project also collected some which were analyzed independently. The results, summarized in Table 4.2 #2, show remarkable agreenent for the Livermore 1978 and 1986 cesium data .on the foods contributing the major part of “exposureand also good agreement for our independent samples in 1987 (Note 8). I am therefore taking 4400 picocurieslday as the exposure due to cesium-137, based on a total of about 4000 for foods listed in Table 4.2#2 plus a 10% allowance far a miscellaneous variety of others (Note 11, Table *1). The whole-body, red marrow and bone surface doses for Jo years are just about equal, 1.65 rem (Table 4.2 #l’). ,. The strontium estimates at present are based on the original 1978 sampling. (No strontium analyses were done on the Livermore 1986 samples, nor were our 1987 samples delivered soon enough to have them done on time.) I am therefore taking .035 picocurieslday for the exposure, based on the field samples plus a 25% increment for other miscellaneous foods. The 30-year doses for whole-body, red marrow, and bone surface are .032, .175 and .385 rem, respectively. In the case of the transuranics, the Livermore group is now summarizing their Rongelap work through 1987 and this involves some revision of both data and dose calculations (Table 4.243). Based on a