1. NAME AND TITLE

PROB: Multigroup One-Dimensional Transport Code System, Collision Probability Method.

2. CONTRIBUTOR

The National Commission of Atomic Energy, Department of Reactors, Buenos Aires, Argentina, through the OECD NEA Data Bank, Gif-sur-Yvette, France.

3. CODING LANGUAGE AND COMPUTER

FORTRAN IV; IBM 360/370.

4. NATURE OF PROBLEM SOLVED

The transport equation in slab geometry is solved using the multigroup collision probability method.

5. METHOD OF SOLUTION

PROB uses successive overrelaxation method.

6. RESTRICTIONS OR LIMITATIONS

Available core storage is the only restriction on the size of the problem. Variable dimensioning is used.

7. TYPICAL RUNNING TIME

The sample problem required five minutes.

8. COMPUTER HARDWARE REQUIREMENTS

An IBM 360/370 computer and at least 70 K core storage are required.

9. COMPUTER SOFTWARE REQUIREMENTS

A FORTRAN IV compiler is required.

10. REFERENCE

J. M. Fink, "PROB: Code for the Solution of the Transport Equation by the Method of Collision Probabilities in Slab Geometry," CNEA Re-58 (June 1972).

11. CONTENTS OF CODE PACKAGE

Included are the referenced document and one (1.2MB) DOS diskette tape which contains the source code and sample problem input and output.

12. DATE OF ABSTRACT

June 1978; reviewed March 1982.

KEYWORDS: MULTIGROUP; ONE-DIMENSION; COLLISION PROBABILITY; NEUTRON; SLAB