CCC-0262 VCS.
VCS, Radiation Protection Factors in Vehicles by Monte-Carlo
NAME OR DESIGNATION OF PROGRAM, COMPUTER, DESCRIPTION OF PROGRAM OR FUNCTION, METHOD OF SOLUTION, RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM, TYPICAL RUNNING TIME, UNUSUAL FEATURES OF THE PROGRAM, RELATED AND AUXILIARY PROGRAMS, STATUS, REFERENCES, MACHINE REQUIREMENTS, LANGUAGE, OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED, OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS, NAME AND ESTABLISHMENT OF AUTHORS, MATERIAL, CATEGORIES
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| Program name | Package id | Status | Status date |
|---|---|---|---|
| VCS | CCC-0262/01 | Arrived | 21-NOV-2001 |
Machines used:
| Package ID | Orig. computer | Test computer |
|---|---|---|
| CCC-0262/01 | IBM 360 series |
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3. DESCRIPTION OF PROGRAM OR FUNCTION
The Vehicle Code System (VCS) facilitates the calculation of radiation protection factors for a
given vehicle; i.e. the ratio by which the free-field radiation is reduced due to the presence of the vehicle. VCS was constructed by linking together a discrete-ordinates air-transport calculation and an adjoint Monte Carlo vehicle dose-importance calculation. A tactical nuclear weapon of low-kiloton yield is detonated within a kilometer of a vehicle. The air-transport calculation determines the neutron and photon flux as a function of energy on a coupling surface surrounding the vehicle. The dose-importance calculation determines the effectiveness of particles at the coupling surface in contributing to dose at a detector position within the vehicle.
The Vehicle Code System (VCS) facilitates the calculation of radiation protection factors for a
given vehicle; i.e. the ratio by which the free-field radiation is reduced due to the presence of the vehicle. VCS was constructed by linking together a discrete-ordinates air-transport calculation and an adjoint Monte Carlo vehicle dose-importance calculation. A tactical nuclear weapon of low-kiloton yield is detonated within a kilometer of a vehicle. The air-transport calculation determines the neutron and photon flux as a function of energy on a coupling surface surrounding the vehicle. The dose-importance calculation determines the effectiveness of particles at the coupling surface in contributing to dose at a detector position within the vehicle.
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4. METHOD OF SOLUTION
VCS calculates protection factors for armored military vehicles by coupling a discrete ordinates calculation with an adjoint Monte Carlo calculation. The discrete ordinates calculation determines the flux on a coupling surface surrounding the vehicle. The Monte Carlo calculation calculates the effectiveness of flux at the surface in causing response in a detector adjacent to the crew members, i.e., the "dose importance". A coupling code folds the flux together with the dose importance, giving the dose response. The coupling code can also rotate the vehicle, move it to different distances from the source, and perturb the energy response of the detector.
VCS calculates protection factors for armored military vehicles by coupling a discrete ordinates calculation with an adjoint Monte Carlo calculation. The discrete ordinates calculation determines the flux on a coupling surface surrounding the vehicle. The Monte Carlo calculation calculates the effectiveness of flux at the surface in causing response in a detector adjacent to the crew members, i.e., the "dose importance". A coupling code folds the flux together with the dose importance, giving the dose response. The coupling code can also rotate the vehicle, move it to different distances from the source, and perturb the energy response of the detector.
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6. TYPICAL RUNNING TIME
The DOT section of VCS requires about 2 hours of CPU time on the IBM 195. Each new vehicle configuration or source position requires about 25 minutes. Each new range or detector response spectrum or vehicle orientation costs a fraction of a minute. RSIC did not complete the running of the packages sample problem because of long running time.
The DOT section of VCS requires about 2 hours of CPU time on the IBM 195. Each new vehicle configuration or source position requires about 25 minutes. Each new range or detector response spectrum or vehicle orientation costs a fraction of a minute. RSIC did not complete the running of the packages sample problem because of long running time.
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CCC-0262/01
VISA Coupling surface flux generatorDRC Detector response calculation
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10. REFERENCES
- W.A. Rhoades:
Development of a Code System for Determining Radiation Protection
of Armored Vehicles (The VCS Code)
ORNL-TM-4664 (October 1974)
- W.A. Rhoades:
Development of a Code System for Determining Radiation Protection
of Armored Vehicles (The VCS Code)
ORNL-TM-4664 (October 1974)
CCC-0262/01, included references:
- W. Rhoades et al.:Vehicle Code System (VCS) User's Manual
ORNL-TM-4648 (August 1974)
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CCC-0262/01
source program mag tapeVISA Source (Fortran IV) SRCTPsource program mag tapeITIME Source (Assembler) SRCTP
source program mag tapeIKLOCK Source (Assembler) SRCTP
source program mag tapeBSAM Source (Assembler) SRCTP
test-case data mag tapeVISA Sample input data DATTP
test-case data mag tapeSUBRT (Assembler) DATTP
test-case data mag tapeDRC Sample input data DATTP
source program mag tapeDOT-III calling program source (FORTRAN IV)SRCTP
test-case data mag tapeDOT-III sample data for VCS problem DATTP
source program mag tapeMORSE routines for VCS problem (FORTRAN IV)SRCTP
test-case data mag tapeMORSE sample data for VCS problem DATTP
user's guide ORNL-TM-4648 (August 1974) WRKPT
Keywords: air scattering, radiation doses, radiation effects, shielding.