Prompt Neutron Decay Constants in a Highly Enriched Uranium-Lead Copper Reflected System

Journal Article · Fri Jul 01 04:00:00 EDT 2016 · Transactions of the American Nuclear Society

OSTI ID:23042747

Sanchez, Rene; Grove, Travis; McKenzie, George; Goda, Joetta; Bounds, John; Cutler, Theresa; Hayes, David ^[1]

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1. Los Alamos National Laboratory: P. O. Box 1663, Los Alamos, NM, 87545 (United States)

Rossi-{alpha} measurements were performed on highly enriched uranium (HEU)-lead copper reflected systems to determine the prompt neutron decay constants. These constants represent an eigenvalue characteristic of these particular critical configurations, which can be experimentally measured by the Rossi-a or pulse neutron source techniques and calculated by a deterministic or Monte Carlo method. In the measurements presented in this summary, highly enriched uranium interleaved with lead plates and reflected with copper were assembled to a high multiplication and the prompt neutron decay constants were determined by the Rossi-{alpha} technique. This research intended to benchmark the lead neutron cross sections; it was a collaboration between the Japanese Atomic Energy Agency (JAEA) Fast Critical Assembly Facility (FCA) in Tokai, Japan and the Los Alamos National Laboratory (LANL) in the U.S. (authors)

• OSTI ID: 23042747
• Journal Information: Transactions of the American Nuclear Society, Journal Name: Transactions of the American Nuclear Society Vol. 115; ISSN 0003-018X
• Country of Publication: United States
• Language: English

Related Subjects

07 ISOTOPE AND RADIATION SOURCES
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BENCHMARKS
COPPER
CROSS SECTIONS
EIGENVALUES
HIGHLY ENRICHED URANIUM
MONTE CARLO METHOD
NEUTRON SOURCES
NUCLEAR ENERGY
PROMPT NEUTRONS
ZERO POWER REACTORS