Impact of MCNP Unresolved Resonance Probability-Table Treatment on Uranium and Plutonium Benchmarks

Conference · Sat Nov 14 23:00:00 EST 1998

OSTI ID:319741

Mosteller, Russell D. ^[1]; Little, Robert C. ^[1]

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1. Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

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.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA), Nuclear Criticality Safety Program (NCSP)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 319741
• Report Number(s): LA-UR--98-2943; CONF-981106--; ON: DE99001847
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BENCHMARKS
Benchmarks
GODIVA REACTOR
JEZEBEL REACTOR
M CODES
Monte Carlo
NEUTRON REACTIONS
NEUTRON TRANSPORT
Nuclear Criticality Safety Program (NCSP)
PLUTONIUM
PROBABILITY
REACTIVITY
RESONANCE
SELF-SHIELDING
URANIUM