Sv weignting ov >i od and 17 tikini and Enewetex data on bird rampie size and bv assuming 2nat muscle and Liver. “e are Listing in tetection limit vaiues Tadle 29 tne Pu concentrations from . tet ek 33 tne Inewetak Padiolceicai Survey. ‘less chan’ numbers) ‘ere actual concentracion ~alues. Table 18 lists the Final radionuciide concentrations The 19-, 20-, :0-, and ~9-vr inte- zral doses resuiting Zrom ingestion of itnat vere used along sith the estimate or fish marine foods are given in Table 21. ingested per dav (600 z/da) to caicu- Strontium-90 contributes the largest late the radionuclide intake via the ‘raction of the bone marrow dose (70 marine food chain (pCi/da). also includes the The table -o 80x), 137 Cs contributes approxi-~ Da and 239,240,| mately 20%, while concentration or some radionuclides in trish used in the zcontribute about 6% of the total. The 1973 Enewetak assessment. ‘nole body dose from the marine pathvav is 50 mrem for the integrated The species of birds that are readily caught and inciuded in the 20-vr dose and 66 mrem for the 50-yr diet are marine feeders, mostly integrated dose. species of terns. doses are 200 mrem and 290 mrem for Therefore, the The bone marrow radionuclide concentrations in their the 30<vr and 50-yr integral doses, cmuscle tissue are similar to that in respectively. the marine diet. are smail relative to those from other For this reason, These integral doses birds and bird eggs are considered rathways. Dart of the marine diet for the pur- contributes a relatively significant 239,240 poses of dose calculation. Although the marine pathway fraction of the total No birds Pu intake, or bird eggs were collecred in June Table 18. 1975, so the data used to evaluate this part of the marine food chain come from previously published reports 8,31,32 Table 19. Average weighted* radio~ nuclide concentrations in fish and clams at Bikini Atoll. and are summarized in Concentration, pCi/g Wet Weight The final concentration data used for dose assessment listed in Table 20 were derived assuming that six times more bird muscle is consumed than liver and that the wet-to-dry Species 606, 137 og 906, 239,240, Fish 1.51 0.14 0.076 0.0028 Clams 2.06 0.011 0.0060 0.0072 ratio is 0.33 for muscle and liver and Enewetak Atoll 1972 Dose Assessment 9.25 for eggs. Fish Because of the absence of Pu concentration data on birds and 2.0 0.39 0.075 - *Yeighted by number of fish or clams sird eggs on Bikini and the similarity ~27- in the sample.