IAEA0841 SFAK.

SFAK, Unscattered Gamma Self-Absorption from Regular Fuel Rod Assemblies

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

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1. NAME OR DESIGNATION OF PROGRAM: SFAK.

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2. COMPUTERS

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Program name	Package id	Status	Status date
SFAK	IAEA0841/01	Tested	21-SEP-1982

Machines used:

Package ID	Orig. computer	Test computer
IAEA0841/01	IBM 3081	IBM 3081

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3. DESCRIPTION OF PROBLEM OR FUNCTION

Calculation of the self- absorption of unscattered (gamma-) radiation from fuel assemblies which contain a regular arrangement of identical fuel rods.

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4. METHOD OF SOLUTION

The point-kernel is integrated over the radiation sources, i.e. the fuel rods. A uniform mesh of integration points is used for each of the fuel rods.

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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM: Number of fuel rods is dynamically allocated.

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6. TYPICAL RUNNING TIME

Execution of the test case on IBM 3081 required 55 CPU seconds.

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7. UNUSUAL FEATURES OF THE PROGRAM:

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8. RELATED AND AUXILIARY PROGRAMS

The program is based on the geometrical subroutine of the Monte Carlo program DIMOS.

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9. STATUS

Package ID	Status date	Status
IAEA0841/01	21-SEP-1982	Tested at NEADB

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10. REFERENCES

- H. Wand,
  SFAK - A Program for Calculating the Self-Absorption of
  Unscattered Gamma Radiation from Fuel Assemblies
  ZfK-318 (November 1976), p. 21.
- K. Noack,
DIMOS - A Multigroup Monte Carlo Code for Criticality Calculations    ZfK-247 (1973).

IAEA0841/01, included references:

- H. Wand:
Fortran Version of SFAK. ZfK - 318(Supplement) (September 1981).

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11. MACHINE REQUIREMENTS

Execution of the test case on IBM 3081 required 92 kbytes of main storage.

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12. PROGRAMMING LANGUAGE(S) USED

Package ID	Computer language
IAEA0841/01	FORTRAN-IV

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13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED:
IBM 3081 MVS/SP with FORTRAN-H EXTENDED compiler.

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14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS:

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15. NAME AND ESTABLISHMENT OF AUTHOR

H. Wand
Zentralinstitut fuer Kernforschung Rossendorf
8051 Dresden
Federal Republic of Germany.

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16. MATERIAL AVAILABLE

IAEA0841/01

File name	File description	Records
IAEA0841_01.003	SFAK INFORMATION FILE	30
IAEA0841_01.004	SFAK SOURCE (FORTRAN-4)	544
IAEA0841_01.005	SFAK JCL FOR TEST CASE	60
IAEA0841_01.006	SFAK INPUT FOR TEST CASE	46
IAEA0841_01.007	SFAK OUTPUT OF TEST CASE	1086

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17. CATEGORIES

J. Gamma Heating and Shield Design

Keywords: absorption, fuel assemblies, fuel rods, gamma radiation, point kernels.