CCC-0440 EXTREME. (Abstract last modified 12-NOV-2001)
1.
NAME OR DESIGNATION OF PROGRAM - EXTREME. 2.
COMPUTER FOR WHICH PROGRAM IS DESIGNED AND OTHER MACHINE VERSION PACKAGES AVAILABLE -
To request or retrieve programs click on the one of the active versions below.
A password and special authorization is required. Explanation of the status codes.
Machines used:
Package-ID Orig.Computer Test Computer
CCC-0440/01 IBM 3033
3.
DESCRIPTION OF PROGRAM OR FUNCTION - The purpose of the EXTREME package is the development and testing of a new family of methods for the calculation of spatial dependence of neutron density in nuclear systems in two-dimensional Cartesian geometry. The program is designed to handle an arbitrary number of spatial, energy, and angle subdivisions. Any degree of scattering anisotropy can be handled for either external source or fission systems.
4.
METHOD OF SOLUTION - The basic approach is to (1) approximate the spatial variation of the neutron source across each spatial sub- division as an expansion in terms of a user-supplied set of exponential basis functions; (2) solve analytically for the resulting neutron density inside each region; and (3) approximate this density in the basis function space in order to calculate the next iteration flux-dependent source terms. In the general case the calculation is iterative due to neutron sources which depend on the neutron density itself.
5.
RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM - The EXTREME code is only designed to handle Cartesian x-y geometry. The only requirements are that the weights sum to one and that necessary reflection angles are present at reflection boundaries; if either of these is not met, the code will indicate so and stop.
6.
TYPICAL RUNNING TIME - On the IBM 3033, the sample problem uses 2 minutes and 15.29 CPU seconds.
7.
UNUSUAL FEATURES OF THE PROGRAM - 8.
RELATED AND AUXILIARY PROGRAMS - 9.
STATUS 10.
REFERENCES - 11.
MACHINE REQUIREMENTS - 12.
PROGRAMMING LANGUAGE(S) USED - 13.
OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED - 14.
OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS - 15.
NAME AND ESTABLISHMENT OF AUTHORS - 16.
MATERIAL AVAILABLE - 17.
CATEGORIES - Keywords: DISCRETE ORDINATE METHOD, MULTIGROUP, NEUTRON TRANSPORT THEORY, TWO-DIMENSIONAL
Program-name Package-ID Status
EXTREME CCC-0440/01 Arrived
CCC-0440/01: 12-NOV-2001 Masterfiled Arrived
CCC-0440/01:
- Ronald Earl Pevey:
Development of a New Two-Dimensional Cartesian Geometry Nodal
Multigroup Discrete Ordinates Method.
ORNL/CSD/TM-182 (July 1982)
CCC-0440/01: FORTRAN-IV
Contributed by:
Radiation Shielding Information Center
Oak Ridge National Laboratory
Oak Ridge, Tennessee, U. S. A.
CCC-0440/01:
JCL
Sample Input Data
Source Program (Fortran-IV)
Sample Output
report ORNL/CSD/TM-182 (July 1982) REPPT
- C. Static Design Studies
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