IAEA0920 CEBIS.

CEBIS, 1-D 2 Group Diffusion Code for Reactor Calculation

NAME OR DESIGNATION OF PROGRAM, COMPUTER, DESCRIPTION OF PROGRAM 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 AUTHORS, MATERIAL, CATEGORIES

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1. NAME OR DESIGNATION OF PROGRAM: CEBIS.

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2. COMPUTERS

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Program name	Package id	Status	Status date
CEBIS	IAEA0920/01	Tested	04-JUL-1986

Machines used:

Package ID	Orig. computer	Test computer
IAEA0920/01	DEC VAX 11/750	IBM 3081

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3. DESCRIPTION OF PROGRAM OR FUNCTION

CEBIS is a reactor physics code for calculations of multiplication factor, flux and power distributions in one dimensional cartesian, cylindrical and spherical geometry. It is intended for reactor physics calculations of stationary thermal multipying systems in two group diffusion approximation. Besides the direct solution, the program gives also the adjoint solution of the diffusion equation.

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4. METHOD OF SOLUTION

The two group one dimensional time independent diffusion equation is solved using finite differences method. The resulting two group diffusion system is solved by the method of fission density iteration. Each group equation is solved by Crout- Cholesky's method.

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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM:

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6. TYPICAL RUNNING TIME:

IAEA0920/01

NEA-DB executed the test case included in this package on an IBM 3081 computer in 4 seconds of CPU time.

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7. UNUSUAL FEATURES OF THE PROGRAM:

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8. RELATED AND AUXILIARY PROGRAMS:

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9. STATUS

Package ID	Status date	Status
IAEA0920/01	04-JUL-1986	Tested at NEADB

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10. REFERENCES:

IAEA0920/01, included references:

- M. Ravnik and I. Mele:
  CEBIS - One Dimensional Two-Group Diffusion Code for Reactor
  Calculations: Programme Manual for PDP-11/34 and IBM-PC Versions.
  IJS-DP-3856  (February 1985)

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11. MACHINE REQUIREMENTS:

IAEA0920/01

To run the test case on IBM 3081, 228K bytes of main storage were required.

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12. PROGRAMMING LANGUAGE(S) USED

Package ID	Computer language
IAEA0920/01	FORTRAN-77

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13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED:

IAEA0920/01

MVS-SP (IBM 3081)

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14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS:

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15. NAME AND ESTABLISHMENT OF AUTHORS

          M. Ravnik, I. Mele
          P. Stefan Institute
          Ljubljana
          Yugoslavia

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16. MATERIAL AVAILABLE

IAEA0920/01

File name	File description	Records
IAEA0920_01.001	Information file	49
IAEA0920_01.002	CEBIS source (FORTRAN 77)	772
IAEA0920_01.003	JCL to run sample case	58
IAEA0920_01.004	Sample case input	36
IAEA0920_01.005	Sample case output	969

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17. CATEGORIES

C. Static Design Studies

Keywords: diffusion equations, flux distribution, multiplication factors, power distribution.