Recent development and applications of the MORSE Code

Conference · Tue Jun 01 04:00:00 EDT 1993

OSTI ID:10167255

Cramer, S N

Several recent analyses using the multigroup MORSE Monte Carlo code are presented. In the calculation of a highly directional-dependent neutron streaming experiment it is shown that P{sub 7} cross section representation produces results virtually identical with those from an analog code. Use has been made here of a recently released ENDF/B-VI data set. In the analysis of neutron distributions inside the water-cooled ORELA accelerator target and positron source, an analytic hydrogen scattering model is incorporated into the otherwise multigroup treatment. The radiation from a nuclear weapon is analyzed in a large concrete building in Nagasaki by coupling MORSE and the DOT discrete ordinates code. The spatial variation of the DOT-generated free-field radiation is utilized, and the building is modeled with the array feature of the MORSE geometry package. An analytic directional biasing, applicable to the discrete scattering angle procedure in MORSE, is combined with the exponential transform. As in more general studies, it is shown that the combined biasing is more efficient than either biasing used separately. Other tracking improvements are included in a difficult streaming and penetration radiation analysis through a concrete structure. Proposals are given for the code generation of the required biasing parameters.

• Research Organization: Oak Ridge National Lab., TN (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 10167255
• Report Number(s): CONF-9304131--8; ON: DE93015915
• Country of Publication: United States
• Language: English

Related Subjects

45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE
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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
99 GENERAL AND MISCELLANEOUS
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CONCRETES
CROSS SECTIONS
M CODES
MATHEMATICS AND COMPUTERS
MONTE CARLO METHOD
NEUTRON TRANSPORT
NUCLEAR EXPLOSIONS
NUCLEAR EXPLOSIONS AND EXPLOSIVES
RADIATION PHYSICS
RADIATION TRANSPORT