Evaluation of fission product after-heat. Quarterly report

Specific tasks covered in this report are: (1) Neutron capture in fission products, with the preliminary result that this effect does not lead to a major change in decay power of real reactors for shutdown times less than 1000 seconds; (2) A fission product decay heat standard, which is still subject to revision as input data are rechecked, but whose one-sigma error limits are considered reliable; (3) A presentation of the errors in the above standard; (4) Initial work on more precise estimates of errors in decay energies of fission products, and on estimating gamma spectra of unmeasured fission product transitions; (5) Pretest predictions of calorimetric decay heat experimental results; (6) Neutron emission from primary fission products