Computer Programs

NEA-0108 ALCI.

NEA-0108 ALCI.

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

NAME OR DESIGNATION OF PROGRAM, COMPUTER, NATURE OF PHYSICAL PROBLEM SOLVED, METHOD OF SOLUTION, RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM, CPU, FEATURES, RELATED AND AUXILIARY PROGRAMS, STATUS, REFERENCES, REQUIREMENTS, LANGUAGE, OPERATING SYSTEM OR MONITOR UNDER WHICH PROGRAM IS EXECUTED, ANY OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS, NAME AND ESTABLISHMENT OF AUTHOR, MATERIAL, CATEGORIES

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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. Rules for end-users 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.