Abstract

Pre-ENDF/B-VI nuclear decay data and fission yields have been supplemented by average beta and gamma energies and Pn-values from recent experiments at Studsvik. This data base has been used for a series of summation calculations, and the results have been compared with experimental determinations of decay heat and of delayed-neutron effects. The comparisons are limited to thermal fission of {sup 235}U and {sup 239}Pu and to fast fission of {sup 238}U. The general impression of the comparisons is that the data base does reproduce experimental results satisfactorily (with a few exceptions) within the combined limits of error of the experimental determinations and the calculation. 21 refs., 15 figs.

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