Computer Programs
NEA-0313 EXPANDA-6.
last modified: 01-DEC-1971 | catalog | categories | new | search |

NEA-0313 EXPANDA-6.

EXPANDA-6, 1-D Neutron Diffusion in Slab, Cylindrical, Spherical Geometry from JAERI Fast-Set with PuO2 UO2 Mixture

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1. NAME OR DESIGNATION OF PROGRAM:  EXPANDA-6.
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2. COMPUTERS
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Program name Package id Status Status date
EXPANDA-6 NEA-0313/01 Tested 01-DEC-1971

Machines used:

Package ID Orig. computer Test computer
NEA-0313/01 IBM 360 series IBM 360 series
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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.
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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.
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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM
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6. TYPICAL RUNNING TIME:  About 2 or 3 minutes for the typical case.
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7. UNUSUAL FEATURES: UNUSUAL FEATURES OF THE PROGRAM
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8. RELATED AND AUXILIARY PROGRAMS:  CONDENSE, LTFR-4.
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9. STATUS
Package ID Status date Status
NEA-0313/01 01-DEC-1971 Tested at NEADB
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10. REFERENCES

- T.Suzuki:
  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)
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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.)
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12. PROGRAMMING LANGUAGE(S) USED
Package ID Computer language
NEA-0313/01 FORTRAN-IV
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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).
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14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS

ANY OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS
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15. NAME AND ESTABLISHMENT OF AUTHOR

          Tomoo Suzuki
          JAERI
          Tokai-mura, Naka-gun
          Ibaraki-ken, Japan
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16. MATERIAL AVAILABLE
NEA-0313/01
File name File description Records
NEA0313_01.001 INFORMATION 4
NEA0313_01.002 SOURCE PROGRAMME +DD+ INPUT CARDS 1670
NEA0313_01.003 PRINTED OUTPUT 4795
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17. CATEGORIES
  • 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.