137 Cs — In the dose model for 137 Cs, it is assumed that the loss of 137 Cs from the body can be described as an exponential loss with a : . . a 10-14 turnover time that varies as a function of age. The annual dose is calculated, always taking into account the residual body burden from . the previous year. : . . Body mass as a function of age is taken from Spiers. 21 Initial dietary intakes are calculated and deses are p redicted, based upon the initial intake and the exponential loss of 137 Cs in the diet at a rate equal to the physical half-time of 1 sto. Diet — The diet for adults is that listed in the original report NVO-140.— For children from ages 1 through 1C, the intake of coccnut milk and coconut meat is doubled to 600 and 200 g/day, respectively. These two products are the most likely to ce consumed in greater quantity by children than by adults. The rest of the diet for children is assumed to be one-half of the adult diet. yo h a From information available, this is a conservative assumption in ct At age 10, it is assumed that the child is on the full adult diet. children are not usually considered to reach the averace adult intake until age 14 or 15. However, because of the diet changes which oceur at 10 yr (i.e., randanus, breadfruit, coconut, etc., which become available) it is convenient to use this point for adjusting the child to the adult diet, and if anything, this adjustment produces a slightly conservative dose estimate for the children due to the high in the adult diet. IV-7 90 Sr content