The calculation proceeds as follows: For each shot calculate the proper distribution of its fission products. Define refractory and volatile mass chains and refractory fractions of mass chains 91, 140 and 141. Allow for fractionation by removing a fraction of the refractory phase. Calculate the curies of each fission product present as a function of time and the total for each decay time. Calculate the mR/hr due to each fission product present as a function of time and the total for each decay time. Calculate the curies of each neutron-induced nuclide allowing for fractionation and the total for each decay time. Calculate the mR/hr of each neutron-induced nuclide and the total for each decay time. Sum the total fission product and total neutron- induced nuclide curies. Sum the total fission product and total neutron-induced mR/hr. Normalize to an external gamma-ray exposure rate of 1 mR/hr at 12 hr postshot by dividing every value by the total mR/hr at 12 hr postshot. Fit the total normalized uCi/m@ and mR/hr by the method of Teast squares to the form 11 Saye i=l “A,t