Integral data testing of ENDF/B fission-product data and comparisons of ENDF/B with other fission product data files
Three experiments (one from Oak Ridge and two from Los Alamos), in which samples of /sup 235/U and /sup 238/Pu were irradiated with thermal neutrons and either the total, gamma-ray, or gamma- and beta-ray fission product decay-energies were measured as functions of cooling time, were selected for comparisons with calculations made using four different fission product data files. The data files used were (1) the ENDF/B-IV fission product file, (2) the ENDF/B-V fission product file, (3) a file derived by substituting decay energies from JNDC into the ENDF/B-V file, and (4) a file derived by substituting decay-energies and spectra from the UK data file into the ENDF/B-V file. Direct summation calculations and spectral comparisons of the experiments were made using these data files as input, and both types of calculational analyses yielded the same results; namely, all data files are deficient, but the JNDC-ENDF/B-V results for the gamma- and beta-ray total decay-energy agree best with experiments. In addition, spectral comparisons with experiment generally indicate that calculated gamma-ray decay-energies are relatively high for early cooling times and small gamma-ray energies; they are low for early cooling times and large gamma-ray energies. The opposite is somewhat the case for the beta-ray decay energies; that is, the calculations are generally low for small beta-ray energies and high for large energies.
- Research Organization:
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 5263159
- Report Number(s):
- LA-9090-MS; ENDF-320; ON: DE82010041; TRN: 82-014406
- Country of Publication:
- United States
- Language:
- English
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22 GENERAL STUDIES OF NUCLEAR REACTORS
FISSION PRODUCTS
AFTER-HEAT
DECAY
NEUTRON REACTIONS
THERMAL FISSION
NUCLEAR FUELS
PLUTONIUM 239 TARGET
URANIUM 235 TARGET
BETA DECAY
BETA SPECTRA
EXPERIMENTAL DATA
GAMMA RADIATION
GAMMA SPECTRA
GROUP CONSTANTS
THEORETICAL DATA
BARYON REACTIONS
CROSS SECTIONS
DATA
ELECTROMAGNETIC RADIATION
ENERGY SOURCES
FISSION
FUELS
HADRON REACTIONS
INFORMATION
IONIZING RADIATIONS
ISOTOPES
MATERIALS
NUCLEAR REACTIONS
NUCLEON REACTIONS
NUMERICAL DATA
RADIATIONS
RADIOACTIVE MATERIALS
REACTOR MATERIALS
SPECTRA
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