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Title: Impact of MCNP unresolved resonance probability-table treatment on uranium and plutonium benchmarks

Versions of MCNP up through and including 4B have not accurately modeled neutron self-shielding effects in the unresolved resonance energy region. Recently, a probability-table treatment has been incorporated into a developmental version of MCNP. This paper presents MCNP results for a variety of uranium and plutonium critical benchmarks, calculated with and without the probability-table treatment.
Authors:
;
Publication Date:
OSTI Identifier:
319741
Report Number(s):
LA-UR--98-2943; CONF-981106--
ON: DE99001847; TRN: 99:003907
DOE Contract Number:
W-7405-ENG-36
Resource Type:
Conference
Resource Relation:
Conference: American Nuclear Society winter meeting, Washington, DC (United States), 15-19 Nov 1998; Other Information: PBD: [1998]
Research Org:
Los Alamos National Lab., NM (United States)
Sponsoring Org:
USDOE Office of Environmental Restoration and Waste Management, Washington, DC (United States)
Country of Publication:
United States
Language:
English
Subject:
66 PHYSICS; 22 NUCLEAR REACTOR TECHNOLOGY; NEUTRON TRANSPORT; M CODES; SELF-SHIELDING; RESONANCE; URANIUM; PLUTONIUM; BENCHMARKS; NEUTRON REACTIONS; REACTIVITY; PROBABILITY; JEZEBEL REACTOR; GODIVA REACTOR