BERYLLIUM-REFLECTED, GRAPHITE-MODERATED CRITICAL ASSEMBLIES

Technical Report · Mon Jul 01 04:00:00 EDT 1957

OSTI ID:4333893

Hansen, G E; Hoogterp, J C; Orndoff, J D; Paxton, H C; Koontz, P G; Roach, W H; Wood, D P

Included are data on the properties of three sets of cylindrical Be- reflected, graphite-moderated critical assemblies that have been set up in the Honeycomb machine. The first set was primarily to establish characteristics as functions of C/U/sup 235/ atomic ratio of a core with nearly constant reflector thickness. Fission rates were mapped with U/sup 235/ foils, and reactivity contributions of some foreign materials were measured. The second set consisted of three assemblies with fixed cores to determine the effect of redistributing reflector from the ends to the cylindrical wall. Flux distributions in the basic fully-reflected assembly were mapped extensively with bare and with Cd-shielded foils of U/sup 235/, Au, and In. The third set was to establish the minimum- volume core at C/U/sup 235/ approximately 350 that could be made critical with available Be. Influences of end reflector and of a Be island were checked. (auth)

• Research Organization: Los Alamos Scientific Lab., N. Mex.
• DOE Contract Number: W-7405-ENG-36
• NSA Number: NSA-12-000562
• OSTI ID: 4333893
• Report Number(s): LA-2141
• Country of Publication: United States
• Language: English

Related Subjects

BERYLLIUM
CADMIUM
CRITICAL ASSEMBLIES
CRITICALITY
CYLINDERS
DISTRIBUTION
FOILS
GOLD
GRAPHITE MODERATOR
INDIUM
MEASURED VALUES
NEUTRON FLUX
PHYSICS
REACTIVITY
REACTOR CORE
REFLECTORS
SHIELDING
THICKNESS
URANIUM 235/