ROGURGINGETEn, LATAt “7 PS ‘ BODY WEIGHTS Data Brookhaven the from . the Marshallese to determine the body weight of male body weight is 72 kg for Bikini, 3,14 . summarized been have ’ Laboratory National adult The average people. 62 kg for Rongelap, 71 kg for Enewetak, The average, therefore, is very near the 70-kg value of and 70 kg for Utirik. As a result, we have used 70 kg as the average body weight reference man. > The average body weight for 113 adult in our dose calculations. females in It is 67 kg for 30 Utirik females and 63 kg the Enewetak population is 61 kg. for 36 Rongelap females.'> STRONTIUM-90 METHODOLOGY Bone-marrow doses and dose rates are calculated in two steps. model of Bennett” is used to correlate First, the 05 concentrations the in diet with that in mineral bone. Second, the dosimetric model developed by Spiers? is bone-marrow dose used to calculate the rate from the concentration in mineral bone. Bennett's empirical model is developed from 90. concentrations in foods and autopsy bone samples from New York and San Francisco. includes age-dependent variations that allow us found It also to make dose estimates for children as well as adults. Using’ Spiers’ filled cavity model we calculate the dose rate DS in bone from the from geometrical considerations, endosteal D. = 0.315 United cells and D>, = 0.434, Nations The dose are rates Scientific are small, 90g, concentration in mineral the dose the calculated rates using respectively. Committee on determined to a directly Therefore rads are equivalent to rems. the These the and to factors not by of bone. Then bone marrow dD, and conversion Effects tissue- are factors quoted Atomic DL, by the Radiation. ~° comparison to radium. Because bone marrow is considered a blood-forming organ (annual dose limit equals 500 mrem/y) and endosteal cells are in an other organ category (annual dose limit equals 1500 mrem/y), . ou: : 90 bone marrow is the more sensitive organ in bone for Sr (see Ref. 21). the