CALCULATIONS OF THE MAXIMUM PERMISSIBLE CONCENTRATIONS IN AIR AND WATER OF CERTAIN FISSION PRODUCT MIXTURES

摘要

The activity of each separate fission product, as it occurs in a fuel element, was calculated for an arbitrarily selected irradiation time of 300 days in a thermal fission reactor and for decay-times of 1, 10, 100 and 1000 days. The maximum permissible concentrations in air and water of the resultant fission product mixtures were then computed and the results presented graphically for varying periods of decay. These calculations suggested that, with the assumptions detailed, the values 1.0 x 10-9 μc/cc (MPC)a and 2.0 x 10-5 μc/cc (MPC)W be used, " for continuous occupational exposure (40 hour week).