NEA-0315 EXPANDA-70.

EXPANDA-70, 1-D Neutron Diffusion in Slab, Cylindrical, Spherical Geometry with Criticality Search

NAME OR DESIGNATION OF PROGRAM, COMPUTER, NATURE OF PHYSICAL PROBLEM SOLVED, METHOD OF SOLUTION, RESTRICTIONS, 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: EXPANDA-70.

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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
EXPANDA-70	NEA-0315/01	Tested	01-DEC-1971

Machines used:

Package ID	Orig. computer	Test computer
NEA-0315/01	IBM 360 series	IBM 360 series

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3. NATURE OF PHYSICAL PROBLEM SOLVED

EXPANDA-70 is a one-dimensional, real or adjoint solution for a slab, cylinder or sphere, and at the same time a dimensional critical search may be made, if requested.
In the numerical solution, the methods are the same as EXPANDA-4. Therefore, EXPANDA-70 is an extension of EXPANDA-4.

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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 sets of two points recurrence formula.

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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

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6. TYPICAL RUNNING TIME: About 5-7 minutes (in CPU time) 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: JFUSER, LTFR-70, EXPANDA-4.

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9. STATUS

Package ID	Status date	Status
NEA-0315/01	01-DEC-1971	Tested at NEADB

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10. REFERENCES

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11. MACHINE REQUIREMENTS

About 64 k words (in overlay structure) including I/O subroutines and buffers.
One magnetic tape unit for library data and six disk scratch units required.

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12. PROGRAMMING LANGUAGE(S) USED

Package ID	Computer language
NEA-0315/01	FORTRAN-IV

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13. OPERATING SYSTEM OR MONITOR UNDER WHICH PROGRAM IS EXECUTED: FACOM-230/60 monitor system (monitor V).

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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

       Akira Hasegawa
       JAERI
       Tokai-mura, Naka-gun
       Ibaraki-ken, Japan

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16. MATERIAL AVAILABLE

NEA-0315/01

File name	File description	Records
NEA0315_01.001	INFORMATION	4
NEA0315_01.002	SOURCE PROGRAMME + OVERLAY + INPUT CARDS	1701
NEA0315_01.003	LTFR-70 SOURCE PROGRAMME + INPUT CARDS	408
NEA0315_01.004	PRINTED OUTPUT	9443

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17. CATEGORIES

C. Static Design Studies

Keywords: cylinders, diffusion, fast reactors, neutron flux, one-dimensional, reaction kinetics, slabs, spheres.