EXPANDA-5, 1-D Neutron Diffusion in Slab, Cylindrical, Spherical Geometry for 2 Region Fast Reactor Criticality
NAME OR DESIGNATION OF PROGRAM
, METHOD OF SOLUTION
, RELATED AND AUXILIARY PROGRAMS
, MACHINE REQUIREMENTS
, OPERATING SYSTEM OR MONITOR UNDER WHICH PROGRAM IS EXECUTED
, OTHER RESTRICTIONS
, NAME AND ESTABLISHMENT OF AUTHOR
1. NAME OR DESIGNATION OF PROGRAM
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||IBM 360 series
||IBM 360 series
3. DESCRIPTION OF PROGRAM OR FUNCTION
NATURE OF PHYSICAL PROBLEM SOLVED. One-dimensional diffusion equation programme in slab, cylinder or spherical geometry, specially designed for the criticality calculations of fast reactor which consists of two-region lattices. It calculates effective cross sections, which will be used as the coefficients of the equation, from the library data of JAERI-Fast set with 25-group structure. The criticality adjustment can be done by adjusting the thickness of one of regions. Adjoint equation can also be solved.
4. METHOD OF SOLUTION
The central difference approximation is adopted for the differential coefficients. The three points difference equation is solved by the ordinary set of two points recurrence formulae. An approximate method is used to take heterogeneity effects into account in estimating effective cross sections of each nuclide in a region.
5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM
7. UNUSUAL FEATURES
: UNUSUAL FEATURES OF THE PROGRAM
8. RELATED AND AUXILIARY PROGRAMS
: CONDENSE, LTFR-4.
||Tested at NEADB
- T. Suzuki:
EXPANDA-5, The One-Dimensional Diffusion Equation Programme for Fast Reactors Consisting of Two-Region Hexagonal Lattices
JAERI-1210(1972) (in English).
11. MACHINE REQUIREMENTS
About 64 k words including I/O subroutines and buffers. One magnetic tape device and one or two scratch devices. (Another tape can be used as program tape.)
12. PROGRAMMING LANGUAGE(S) USED
13. OPERATING SYSTEM OR MONITOR UNDER WHICH PROGRAM IS EXECUTED
IBM-360/J75 OS catalogued procedure (G-level).
FACOM-230/60 monitor system (LIBE operates the absolute address program tape).
14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS
ANY OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS
15. NAME AND ESTABLISHMENT OF AUTHOR
||SOURCE PROGRAMME +DD+ INPUT CARDS
- B. Spectrum Calculations, Generation of Group Constants and Cell Problems
- C. Static Design Studies
Keywords: criticality, cross sections, cylinders, difference equations, diffusion equations, fast reactors, hexagonal lattices, neutron flux, one-dimensional, slabs, spheres.