New data of strontium-90 in milk powder samples collected from a network of Canadian sampling sites are reported for the period April to December, 1958. It is shown that the levels are continuing to increase at about the same rate as for the previous year. In addition, the results of a special study on liquid milk samples are included. An attempt is also made to estimate from these and earlier Canadian dath the expected concentration of strontium-90 in human bone at the present time resulting from the strontium-90 ingested in the average Canadian diet during the period in which measurable amounts of strontium-90 have been present in milk. It is shown that these calculations are in reasonable agreement with the very limited experimental data for Canadian bone samples and that the levels are well below those recommended as maximum permissible by the International Commission on Radiological Protection. (auth)
U.S. Atomic Energy Commission depository collection.
Note
NSA number: NSA-13-014410 OSTI Identifier 4252847 Research organization: Canada. Dept. of National Health and Welfare. Radiation Protection Div., Ottawa.