26 6. Fractionated neutron-induced nuclides, curies Each neutron-induced nuclide was put into the original ORIGEN calculation as 1.43 x 10)? atoms or one atom produced per fission. The resulting curies appeared in the decay matrix referred to in sections 3 and 4 above. The curies of fractionated, neutron-induced nuclides was calculated by (A/F) * bfA) + D(A), = KT , I(A), where I(A), fractionated curies of mass A as a function of i > ~ aA time, atoms per fission of mass A (input data), b(A) = 1.0 for volatile masses 181-203, b(A) = fraction of refractory elements present, f, (input data) for refractory masses 7-74 and 204-242--note that there are no datafor any volatile nuclide in these mass ranges, D(A), = curies of mass A as a function of time, assuming a production of 1 atom per fission. Fractionated neutron-induced nuclides, mR/hr IMR(A) t where IMR(A), "1 7. 1(A), + C(A) mR/hr due to mass A measured 1 m above the ground as a function of time.