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Atmospheric nuclear testing carried out at the start of the sixties brought about environmental pollution by fission products which have reached humans through the food chain. Since the end of the 1950s, the Radiation Protection Unit of the JRC in Ispra has periodically tested the area surrounding the Ispra plant and measured the corresponding matrices, thus keeping under review concentrations of 90Sr and 137Cs deposited in grass and milk. This has enabled the transfer factors of grass-deposit and milk-deposit of the two radionuclides to be determined and their behaviour to be tracked over a period of time. This in turn makes it possible to forecast, from the measurement of deposits, the levels of concentration in grass and milk in the short and long term. With the information provided, forecasts can be made on the concentration of radiocaesium in milk for short term deposits of an acute type, such as those which resulted from the accident at Chernobyl.

Additional information

Authors: RISPOSI L, JRC Ispra (IT)
Bibliographic Reference: Paper presented: XXVIII Congresso Nazionale, Taormina (IT), October 13-16, 1993
Availability: Available from (1) as Paper IT 37949 ORA
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