The bone-marrow dose-rates t o children are calculated by combining -;+ h the approach develored by Srier 1) Bennett's model for children and used in the UNSCEAR report the mineral or matrix pone dose for estinating bone-marrow dcse from The values used for converting Le doses, to bone-marrow and endost eal cell d respectively. are 0.314 and 0.434 Eennett's model a lso extrarolates to the adult case and is combined with the Sriers aprr cach for predicting the pone-narrow doses to adults. The bone mass is- assumed to correlate directly vith these data as a function of age are taken from Sriers. masses are based upon averace data fron the U.S. 271 These tcdy rorulavion and a factor of 0.85 was incorporated to account for the smaller sire of the Enewetakese. The calcium concentraticn in tone (eCe,g cone) as a 1S : function oF age is taken freom Hennett.7~ In calculating the mineral tone cose (D, dose) in IVd-1-S, the x approach of tanol& ICRP” > was Tollowed, . using a ef = 1 and n=5. The doses calculated from this model are compared to the 3-rem'yr guide (ICKP for bone for general public. both children . a2 $)°” However, in assessing the annual dose to and adults, the bone marrow is taken as the critical organ, “oe . meas aaett and the recommendaticns in ICHP il . are usec. In this rodel the quality factor is still one (GF = 1), and the *n" factor is no longer arplicable. The bone marrow is considered in the category of sensitive plood-farming organs, and the ccerresponding dsse guide for such organs is 0.5 rem/yr rather than the 3 rem/yr for mineral bone. te be wo