NEA-0320 ARGO.

ARGO, 1-D Neutron Diffusion in Slab, Cylindrical, Spherical Geometry from JAERI Fast-Set, ABBN, RCBN

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

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1. NAME OR DESIGNATION OF PROGRAM: ARGO.

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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
ARGO	NEA-0320/01	Tested	01-DEC-1971

Machines used:

Package ID	Orig. computer	Test computer
NEA-0320/01	IBM 360 series	IBM 360 series

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3. NATURE OF PHYSICAL PROBLEM SOLVED

ARGO is a one-dimensional (slab, cylinder or sphere), multigroup diffusion code for use in fast reactor criticality and kinetic parameter analysis. Three cross section sets, i.e., JAERI-Fast-Set, ABBN-Set and RCBN-Set, of 25 groups are prepared for the code as its library tapes.

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4. METHOD OF SOLUTION

Eigenvalues are computed by ordinary source-iteration techniques with ordinary acceleration methods for convergence.

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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM: Sphere geometry.

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6. TYPICAL RUNNING TIME

A typical calculation in cylinder geometry with 25 groups, 6 regions and 78 mesh points requires about 120 sec running time on the FACOM 230/60.

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7. UNUSUAL FEATURES: UNUSUAL FEATURES OF THE PROGRAM

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8. RELATED AND AUXILIARY PROGRAMS

LTARGO. Cross sections must be input via tape which is prepared by LTARGO.

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9. STATUS

Package ID	Status date	Status
NEA-0320/01	01-DEC-1971	Tested at NEADB

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10. REFERENCES

- K. Moriguchi, T. Suzuki:
  Multigroup Calculations of Kinetics Parameters in Fast Reactors (KRARAM-Code)
  JAERI-1082 (1965).
- T. Suzuki:
  EXPANDA-4, The One-Dimensional Diffusion Equation Code for Fast Reactors Using the JAERI-Fast-Set
  JAERI-Memo 3660 (1969).
- H. Nishimura:
Reactor Constants for JFER (RCBN-Set) 2, Evaluation of the Nuclear    Characteristics of Japan Experimental Fast Reactor (JFER)
  JAERI-Memo 4214 (1970).

NEA-0320/01, included references:

- K. Ikawa:
ARGO, Kinetic Parameter Calculation Code
JAERI-Memo 4331 (1971).

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11. MACHINE REQUIREMENTS

A 65 k memory, two storage devices (disks), and two magnetic tape units, one of which is for the cross section library and the other for the programme.

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12. PROGRAMMING LANGUAGE(S) USED

Package ID	Computer language
NEA-0320/01	FORTRAN-IV

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13. OPERATING SYSTEM OR MONITOR UNDER WHICH PROGRAM IS EXECUTED

The programme is constructed within the monitor system of FACOM 230.

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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

      Koji Ikawa
      JAERI
      Tokai-mura, Naka-gun
      Ibaraki-ken, Japan.

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16. MATERIAL AVAILABLE

NEA-0320/01

File name	File description	Records
NEA0320_01.001	INFORMATION	7
NEA0320_01.002	LTARGO SOURCE+DD CARDS+A PART OF INPUT	552
NEA0320_01.003	ARGO SOURCE PROGRAMME	2022
NEA0320_01.004	ARGO OVERLAY,DD CARDS+INPUT DATA	49
NEA0320_01.005	ARGO PRINTED OUTPUT	8748

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17. CATEGORIES

C. Static Design Studies

Keywords: criticality, cylinders, diffusion, fast reactors, iterative methods, kinetics, multigroup, one-dimensional, slabs, spheres.