Reactivity Effect of Cross-Section Processing for Moist Bulk-Oxide Criticals

Conference · Mon Nov 12 04:00:00 EST 1979

OSTI ID:5392778

Bucholz, J. A. ^[1]; Westfall, R. M. ^[1]

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1. Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Good multigroup cross-section data is necessary if accurate analyses of critical or slightly sub-critical systems are performed. How the flux spectrum as calculated by the Nordheim method and by a more exact method can ultimately affect the calculated multiplication and/or critical mass of slightly moderated bulk-oxide systems is shown. Self-shielded multigroup cross sections were generated using the Nordheim method as implemented in the NITAWL code and by a more exact method as implemented in the ROLAIDS code. To eliminate geometric effects, both codes were used to generate cross sections for an infinite homogeneous media of U₃O₈ and water (U = 4.65% Uranium 235).

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA), Nuclear Criticality Safety Program (NCSP); USNRC
• DOE Contract Number: W-7405-ENG-26
• OSTI ID: 5392778
• Report Number(s): CONF-791103--87
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420203* -- Engineering-- Handling Equipment & Procedures
97 MATHEMATICS AND COMPUTING
ABSORPTION
ACTINIDE COMPOUNDS
ACTINIDES
CALCULATION METHODS
CHALCOGENIDES
CRITICAL MASS
CRITICALITY
CROSS SECTIONS
ELEMENTS
ENRICHED URANIUM
FLUX DENSITY
HYDROGEN COMPOUNDS
ISOTOPE ENRICHED MATERIALS
METALS
MULTIPLICATION FACTORS
Multigroup Cross-Section Data
NATIONAL ORGANIZATIONS
NEUTRON FLUX
NITAW
Nordheim Method
Nuclear Criticality Safety Program (NCSP)
OXIDES
OXYGEN COMPOUNDS
RADIATION FLUX
REACTIVITY
REACTIVITY COEFFICIENTS
RESONANCE ABSORPTION
ROCKY FLATS PLANT
ROLAIDS
SLIGHTLY ENRICHED URANIUM
URANIUM
URANIUM COMPOUNDS
URANIUM OXIDES
URANIUM OXIDES U3O8
US AEC
US DOE
US ERDA
US ORGANIZATIONS
WATER