“…where there are i radionuclides produced; D is a dilution factor; t, is the fraction of activity produced that migrates from the site of its production; QÍ is the total quantity of the the i'* radionuclide produced at saturation; T, is the residence time in the activation zone; T, is the mean life of the i" 1 radionuclide; t, is the transport time from leaving the activation zone to reaching the laboratory perimeter; M, is the * Recently, Balukova et al 108 have measured the distribution coefficients of the radionuclides 7 Be, 22 Na, 32 P, 35 …”