IAEA0821 WELWING.

WELWING, Material Buckling for HWR with Annular Fuel Elements

NAME OR DESIGNATION OF PROGRAM, COMPUTER, NATURE OF PHYSICAL PROBLEM SOLVED, METHOD OF SOLUTION, RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM, CPU, FEATURES, AUXILIARIES, STATUS, REFERENCES, 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: WELWING.

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2. COMPUTERS

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Program name	Package id	Status	Status date
WELWING	IAEA0821/01	Tested	01-DEC-1973

Machines used:

Package ID	Orig. computer	Test computer
IAEA0821/01	IBM 370 series	IBM 370 series

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3. NATURE OF PHYSICAL PROBLEM SOLVED

WELWING was developed to calculate the material buckling of reactor systems consisting of annular fuel elements in heavy water as moderator for various moderator to fuel ratios. The moderator to fuel ratio for the maximum material buckling for the particular system is selected automatically and the corresponding material buckling is calculated.

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4. METHOD OF SOLUTION

The method used is an analytical solution of the one-group diffusion equations with various corrections and approximations.

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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

Up to 32 different materials in the fuel element may be used.

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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 OR AUXILIARY PROGRAMS: RELATED AND AUXILIARY PROGRAMS

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9. STATUS

Package ID	Status date	Status
IAEA0821/01	01-DEC-1973	Tested at NEADB

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10. REFERENCES

- A. Koster:
A FORTRAN IV Computer Code for Buckling Calculations on Cylindrical Fuel Elements
PEL 183, 1969 (to be published).

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11. HARDWARE REQUIREMENTS: MACHINE REQUIREMENTS

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12. PROGRAMMING LANGUAGE(S) USED

Package ID	Computer language
IAEA0821/01	FORTRAN-IV

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13. OPERATING SYSTEM OR MONITOR UNDER WHICH PROGRAM IS EXECUTED: OS/360.

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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

                 O. G. P. Grosskopf
                 South African Atomic Energy Board
                 Private Bag 256
                 Pelindaba, Pretoria, South Africa

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16. MATERIAL AVAILABLE

IAEA0821/01

File name	File description	Records
IAEA0821_01.001	SOURCE PROGRAM (FORTRAN)	813
IAEA0821_01.002	SAMPLE PROBLEM	85
IAEA0821_01.003	OUTPUT LIST OF SAMPLE PROBLEM	222

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17. CATEGORIES

B. Spectrum Calculations, Generation of Group Constants and Cell Problems

Keywords: buckling, diffusion equations, fuel elements, heavy water, one-group theory.