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NEA-0108 ALCI.

ALCI, Homogeneous 2-D MultiGroup Neutron Diffusion in X-Z, R-Z, R-Theta Geometry with Criticality Search

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1. NAME OR DESIGNATION OF PROGRAM:  ALCI.
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2. COMPUTERS
To submit a request, click below on the link of the version you wish to order. Only liaison officers are authorised to submit online requests. Rules for requesters are available here.
Program name Package id Status Status date
ALCI NEA-0108/01 Tested 01-DEC-1973

Machines used:

Package ID Orig. computer Test computer
NEA-0108/01 IBM 370 series IBM 370 series
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3. NATURE OF PHYSICAL PROBLEM SOLVED

Solves the homogeneous multigroup two-dimensional neutron diffusion equations in the x-y, r-z and r-theta geometries. Geometrical and composition criticality searches are allowed. The adjoint problem can be solved optionally.
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4. METHOD OF SOLUTION

The internal iterations are treated by the alternating directions method. The external iterations are treated by the Chebyshev extrapolation technique.
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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

                                   ALCI-1     ALCI-2
          maximum number of groups    12          3
          maximum number of points  6000       3600
          maximum number of regions  300       1000
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6. TYPICAL RUNNING TIME
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7. UNUSUAL FEATURES: UNUSUAL FEATURES OF THE PROGRAM
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8. RELATED AND AUXILIARY PROGRAMS

The version distributed by the library is a translation of the original (written in French FORTRAN) with minor modifications in the standard French library subroutines.
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9. STATUS
Package ID Status date Status
NEA-0108/01 01-DEC-1973 Tested at NEADB
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10. REFERENCES
NEA-0108/01, included references:
- J.P. Bayard et al.:
  Specification d'un Code de Diffusion Multigroupe a deux
  Dimensions: ALCI
  CEA - R 2747 (1965).
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11. HARDWARE REQUIREMENTS: MACHINE REQUIREMENTS
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12. PROGRAMMING LANGUAGE(S) USED
Package ID Computer language
NEA-0108/01 FORTRAN-IV
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13. OPERATING SYSTEM OR MONITOR UNDER WHICH PROGRAM IS EXECUTED:  FORTRAN monitor.
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14. ANY OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS:  The programme is divided into 5 links.
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15. NAME AND ESTABLISHMENT OF AUTHOR

    J.P. Bayard, A. Guillou, B. Lago, M.J. Bureau du Colombier, G. Gillou, C. Vasseur
    C.E.N. Saclay
    France
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16. MATERIAL AVAILABLE
NEA-0108/01
File name File description Records
NEA0108_01.001 SYSTEM SUBROUTINES (ASSEMBLER) 1257
NEA0108_01.002 SOURCE PROGRAM (FORTRAN) 5902
NEA0108_01.003 OVERLAY CONTROL CARDS 15
NEA0108_01.004 SAMPLE PROBLEM 27
NEA0108_01.005 OUTPUT LIST OF SAMPLE PROBLEM 720
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17. CATEGORIES
  • C. Static Design Studies

Keywords: criticality searches, multigroup, neutron diffusion equation, numerical solution, r-theta, r-z, two-dimensional, x-y.