A user's manual for MASH 1. 0: A Monte Carlo Adjoint Shielding Code System

Technical Report · Sun Mar 01 00:00:00 EST 1992

DOI:https://doi.org/10.2172/5524813· OSTI ID:5524813

Johnson, J. O. ^[1]

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1. ed.

The Monte Carlo Adjoint Shielding Code System, MASH, calculates neutron and gamma-ray environments and radiation protection factors for armored military vehicles, structures, trenches, and other shielding configurations by coupling a forward discrete ordinates air-over-ground transport calculation with an adjoint Monte Carlo treatment of the shielding geometry. Efficiency and optimum use of computer time are emphasized. The code system include the GRTUNCL and DORT codes for air-over-ground transport calculations, the MORSE code with the GIFT5 combinatorial geometry package for adjoint shielding calculations, and several peripheral codes that perform the required data preparations, transformations, and coupling functions. MASH is the successor to the Vehicle Code System (VCS) initially developed at Oak Ridge National Laboratory (ORNL). The discrete ordinates calculation determines the fluence on a coupling surface surrounding the shielding geometry due to an external neutron/gamma-ray source. The Monte Carlo calculation determines the effectiveness of the fluence at that surface in causing a response in a detector within the shielding geometry, i.e., the dose importance'' of the coupling surface fluence. A coupling code folds the fluence together with the dose importance, giving the desired dose response. The coupling code can determine the dose response a a function of the shielding geometry orientation relative to the source, distance from the source, and energy response of the detector. This user's manual includes a short description of each code, the input required to execute the code along with some helpful input data notes, and a representative sample problem (input data and selected output edits) for each code.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOD; Department of Defense, Washington, DC (United States)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 5524813
• Report Number(s): ORNL/TM-11778; ON: DE92010375
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE
M CODES
MILITARY EQUIPMENT
SHIELDING
RADIATION TRANSPORT
VEHICLES
COMPUTER PROGRAM DOCUMENTATION
CROSS SECTIONS
D CODES
G CODES
GAMMA RADIATION
MONTE CARLO METHOD
NEUTRON FLUX
RADIATION PROTECTION
TRANSPORT THEORY
COMPUTER CODES
ELECTROMAGNETIC RADIATION
EQUIPMENT
IONIZING RADIATIONS
RADIATION FLUX
RADIATIONS
663600* - Radiation Physics- (1992-)
990200 - Mathematics & Computers
450000 - Military Technology
Weaponry
& National Defense