NEA-1005 MOBIDIC.

MOBIDIC, Fast Reactor Hexagonal Infinite Lattice 2 Component Fuel Pin Diffusion Coefficient

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: MOBIDIC.

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2. COMPUTERS

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Program name	Package id	Status	Status date
MOBIDIC	NEA-1005/01	Tested	21-MAR-1985

Machines used:

Package ID	Orig. computer	Test computer
NEA-1005/01	CDC 7600	CDC CYBER 740

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3. DESCRIPTION OF PROGRAM OR FUNCTION

MOBIDIC calculates radial and axial diffusion coefficients in a fast reactor hexagonal regular infinite lattice composed of two media, fuel pins and coolant (which may be voided). A non-zero value of the buckling vector Br, Bz must be given.

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4. METHOD OF SOLUTION

The program performs a numerical calculation of an analytical formula involving special functions and integrals.

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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM: Bidimensional
coolant gaps must exist.

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6. TYPICAL RUNNING TIME

The running time is mainly related to the density of the coolant. Typically it is less than 1 CPU second.

NEA-1005/01

NEA-DB executed the test case included in this package on CDC CYBER 740 in 1.2 seconds of CPU time.

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7. UNUSUAL FEATURES OF THE PROGRAM:

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8. RELATED AND AUXILIARY PROGRAMS

ASDIC calculates radial and axial diffusion coefficients in a fast reactor ASSEMBLY, and is based on similar hypotheses.

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9. STATUS

Package ID	Status date	Status
NEA-1005/01	21-MAR-1985	Tested at NEADB

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10. REFERENCES:

NEA-1005/01, included references:

- P. Benoist:
  A Simple Model for the Calculation of the Sodium-Voiding Effect on
  Neutron Leakages in a Fast Reactor Lattice: I. Formalism.
  Reprint from "Nuclear Science and Engineering", 86, 22-40 (1984)
- P. Benoist and T. Duracz:
  A Simple Model for the Calculation of the Sodium-Voiding Effect on
  Neutron Leakages in a Fast Reactor Lattice:
  II. Numerical Results for Hexagonal Lattices.
  Reprint from "Nuclear Science and Engineering", 86, 41-46 (1984)
- P. Benoist and T. Duracz:
  Notice d'Exploitation du Programme MOBIDIC.
- P. Benoist and T. Duracz:
  User's Manual for MOBIDIC Code.  (1984)

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11. MACHINE REQUIREMENTS

To run the test case on CDC CYBER 740, 63,300 (octal) words of main storage (CM) are required.

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12. PROGRAMMING LANGUAGE(S) USED

Package ID	Computer language
NEA-1005/01	FORTRAN-77

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13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED

SCOPE 2.
NEA 1005/01: The test case was run on CDC CYBER 740 under NOS 1.4-531.

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14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS:

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15. NAME AND ESTABLISHMENT OF AUTHORS

         P. Benoist and T. Duracz
         C.E.N. Saclay
         France

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16. MATERIAL AVAILABLE

NEA-1005/01

File name	File description	Records
NEA1005_01.003	INFORMATION FILE	32
NEA1005_01.004	JCL TO RUN TEST CASE	6
NEA1005_01.005	MOBIDIC SOURCE PROGRAM	873
NEA1005_01.006	INPUT DATA OF TEST CASE	3
NEA1005_01.007	PRINTED OUTPUT OF TEST CASE	56

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17. CATEGORIES

C. Static Design Studies
H. Heat Transfer and Fluid Flow

Keywords: buckling, cell calculation, fast reactors, neutron transport theory.