Computer Programs
NEA-0545 FEM-BABEL.
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NEA-0545 FEM-BABEL.

FEM-BABEL, 3-D MultiGroup Neutron Diffusion by Galerkin Method

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1. NAME OR DESIGNATION OF PROGRAM:  FEM-BABEL.
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2. COMPUTERS
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Program name Package id Status Status date
FEM-BABEL NEA-0545/01 Tested 01-APR-1980

Machines used:

Package ID Orig. computer Test computer
NEA-0545/01 IBM 3033 IBM 3033
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3. NATURE OF PHYSICAL PROBLEM SOLVED

This program computes the three-dimensional multigroup neutron diffusion equation using the finite element method.
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4. METHOD OF SOLUTION

The equation is solved using a solution algorithm based on a Galerkin-type scheme. Prism and box-shaped finite elements are used. The resulting equation system is solved using the sucessive over-relaxation method and the inner iterations are accelerated by a coarse mesh  rebalancing technique.
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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

Any down-scattering of neutrons is allowed but up-scattering and region-dependent fission  spectra are not permitted.
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6. TYPICAL RUNNING TIME

The running time is 95 sec for a homogeneous cubic reactor problem with two energy groups and a 10 x 10 x 10 mesh.
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7. UNUSUAL FEATURES: UNUSUAL FEATURES OF THE PROGRAM
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8. RELATED OR AUXILIARY PROGRAMS: RELATED AND AUXILIARY PROGRAMS
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9. STATUS
Package ID Status date Status
NEA-0545/01 01-APR-1980 Tested at NEADB
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10. REFERENCES

- T. Ise, T. Yamazaki and Y. Nakahara:
  'FEM-BABEL' - A Computer Program for Solving Three-Dimensional Diffusion Equation by the Finite Element Method
  JAERI 1256 (1978).
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11. HARDWARE REQUIREMENTS: MACHINE REQUIREMENTS
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12. PROGRAMMING LANGUAGE(S) USED
Package ID Computer language
NEA-0545/01 FORTRAN-IV
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13. OPERATING SYSTEM OR MONITOR UNDER WHICH PROGRAM IS EXECUTED:  Standard
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14. ANY OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS

The  following I/O files (units) are required: 1,2,3,4,5(card input), 6(printer),8,9,10,11,12,13,and 14.
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15. NAME AND ESTABLISHMENT OF AUTHOR

    T. Ise, T. Yamazaki and Y. Nakahara,
    Japan Atomic Energy Research Institute,
    Tokai-Mura, Ibaraki-ken, Japan
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16. MATERIAL AVAILABLE
NEA-0545/01
File name File description Records
NEA0545_01.001 INFORMATION 22
NEA0545_01.002 FEM-BABEL SOURCE (F4) 2811
NEA0545_01.003 JCL FOR COMPILATION AND LINKAGE EDIT 8
NEA0545_01.004 FEMADD SOURCE (F4) 112
NEA0545_01.005 JCL FOR C&L (FEMADD) 8
NEA0545_01.006 JCL FOR LINK (FEM-BABEL&FEMADD) 17
NEA0545_01.007 S.P. INPUT WITH JCL 67
NEA0545_01.008 PRINTED OUT OF S.P. 549
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17. CATEGORIES
  • C. Static Design Studies

Keywords: finite element method, multigroup, neutron diffusion equation, three-dimensional.