Transfer Of 210po From Cattle Feed To Milk

210Po has been proposed for use in radionuclide electrical generators in space missions. Accidental release of the quantities of this material required for such an application could lead to the contamination of large areas. One of the hazards of such an accident could be the transfer of 210Po from contaminated dairy pasture to man through the milk supply: This study is an attempt to estimate the magnitude of this problem from a 210Po acute ingestion experiment with one Holstein cow. With the use of assumptions regarding the feeding of cattle and the intake of milk by man an estimate of the surface deposition to produce a maximum permissible body burden is made.