EXPANDA-6, 1-D Neutron Diffusion in Slab, Cylindrical, Spherical Geometry from JAERI Fast-Set with PuO2 UO2 Mixture
NAME OR DESIGNATION OF PROGRAM
, NATURE OF PHYSICAL PROBLEM SOLVED
, METHOD OF SOLUTION
, TYPICAL RUNNING TIME
, 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. NATURE OF PHYSICAL PROBLEM SOLVED
EXPANDA-6 solves the one-dimensional diffusion equation in slab, cylinder or spherical geometry. 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 the usual concentration search together with an optional search by changing concentration of PU02 in the PU02-U02 mixture.
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.
5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM
6. TYPICAL RUNNING TIME
: About 2 or 3 minutes for the typical case.
7. UNUSUAL FEATURES
: UNUSUAL FEATURES OF THE PROGRAM
8. RELATED AND AUXILIARY PROGRAMS
: CONDENSE, LTFR-4.
||Tested at NEADB
EXPANDA-3 EXPANDA-6, The One-Dimensional Diffusion Equation Codes for Fast Reactors with an Option of Concentations Search
JAERI-Memo 4472 (1971) (written in Japanese).
NEA-0313/01, included references:
- Expanda-3, Expanda-6 (JAERI-M 4472 1971)
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 programme 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 programme 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, neutron flux, one-dimensional, slabs, spheres.