Safety_Series_041_1975 - gnssn - International Atomic Energy ...

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74 A PPEN D IX IV
FIG. 3. A tm o s p h e r ic re le a s e m o d e l.
FIG. 4. A q u e o u s r e le a s e m o d e l.
The parameters were obtained in experimental work, in studies
related to fall-out measurements and, in some cases, from the
literature. In particular, the rate of deposition of aerosols was
taken as 3 X 10"3 m /s, based on studies of the mean annual values
in low-altitude releases. The Argentine data contributed to UNSCEAR
during the last ten years were used to obtain factors for transfer to
90 i ^7
the diet (double-parameter formula for Sr and Cs, and timeintegral
method for 1311). The factors for transfer of 90Sr to man
were derived from the work "Radiostrontium in man, as a function
of age" (CNEA 322), replacing the dosimetric factor for whole bone
by that for marrow (which was found to be the critical organ).
The composition assumed for the releases was that indicated
in the Atucha Safety Report with the addition of values representative