Delayed neutron data and group parameters for 43 fissioning systems

Journal Article · Sun Oct 01 04:00:00 EDT 1989 · Nuclear Science and Engineering; (USA)

DOI:https://doi.org/10.13182/NSE103-129· OSTI ID:7147276

Brady, M C ^[1]; England, T R ^[2]

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1. Oak Ridge National Lab., TN (USA)
2. Los Alamos National Lab., NM (USA)

The quality and quantity of delayed neutron precursor data have greatly improved over the past decade and a half. Supplementation of the data with model calculations and the use of models to extend the number of precursors to 271 is now practical. These data, along with other improved fission product parameters, permit direct calculations of aggregate behavior for many fissioning nuclides. The results can still be approximated using a few (usually six) temporal groups, including corresponding spectra, as in past practice for reactor physics. An extensive effort to provide a complete set of evaluated data is summarized, with an emphasis on its use to generate the temporal approximations; precursor data and group values are intended for inclusion in ENDF/B-VI.

• OSTI ID: 7147276
• Journal Information: Nuclear Science and Engineering; (USA), Journal Name: Nuclear Science and Engineering; (USA) Vol. 103:2; ISSN 0029-5639; ISSN NSENA
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
220100* -- Nuclear Reactor Technology-- Theory & Calculation
BARYONS
CALCULATION METHODS
DATA
ELEMENTARY PARTICLES
EVALUATED DATA
FERMIONS
FISSION NEUTRONS
FISSION PRODUCTS
HADRONS
INFORMATION
ISOTOPES
MATERIALS
NEUTRONS
NUCLEONS
NUMERICAL DATA
PARAMETRIC ANALYSIS
PHYSICS
PRECURSOR
RADIOACTIVE MATERIALS
REACTOR PHYSICS