What you should know about ENDF/B version V

Conference · Wed Jun 01 04:00:00 EDT 1977

OSTI ID:7106297

Kinsey, R; Dunford, C

The primary source of nuclear data for reactor shielding calculations is the Evaluated Nuclear Data File (ENDF/B). This data file is maintained and distributed by the National Nuclear Data Center (NNDC) of Brookhaven National Laboratory. The file is based on nuclear data evaluations provided by members of the Cross Section Evaluation Working Group (CSEWG). A new version of the ENDF/B file (ENDF/B-V) is now in preparation. The new file will be ready for release in early 1978. There are several new or revised data representations in ENDF/B-V. These include the ability to specify the components of the energy released in fission and the ability to specify energy dependence in the Watt fission spectrum parameters. A revised format was developed for radioactive decay data in which one can give more details about the decay radiations, particularly their energy spectra. The formats for cross section covariance matrix representations were revised, and formats for the resonance region, added. Among the new data which can be entered into the file are cross sections for production of isomeric states in the form of probabilities or absolute cross sections. In order to improve the accuracy and reliability of ENDF/B-V, extensive improvements were made in the checking programs and the review kits. The major materials in the General Purpose file are being revised where new measurements indicate improvements are required. The neutron standards were completely revised for /sup 6/Li, /sup 10/B, and /sup 235/U. A preliminary version of an Actinide File already exists. In support of damage studies, a Gas Production File containing hydrogen and helium production cross sections is being created. An Activation File containing selected reaction and decay data necessary for activation calculations is in preparation. The Fission Product File and Dosimetry File of ENDF/B-IV are being upgraded. 2 figures, 4 tables.

• Research Organization: Brookhaven National Lab., Upton, NY (USA)
• DOE Contract Number: EY-76-C-02-0016
• OSTI ID: 7106297
• Report Number(s): BNL-NCS-22865/R; CONF-770611-202
• Country of Publication: United States
• Language: English

Related Subjects

651000 -- Nuclear Physics
654002* -- Radiation & Shielding Physics-- Shielding Calculations & Experiments-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BASIC INTERACTIONS
BETA DECAY
DECAY
ENERGY
FISSION
INTERACTIONS
LEPTONIC DECAY
NUCLEAR DATA COLLECTIONS
NUCLEAR REACTIONS
PARTICLE DECAY
Q-VALUE
REACTORS
SHIELDING
WEAK INTERACTIONS
WEAK PARTICLE DECAY