1. NAME AND TITLE

RHEIN: Reactor Code System for Neutron Physics Calculation.

2. CONTRIBUTOR

Zentralinstitut Fur Kernforschung Rossendorf, Dresden, Germany, through NEA Data Bank, Gif-sur-Yvette Cedex, France.

3. CODING LANGUAGE AND COMPUTER

FORTRAN IV; IBM 3090, ES-1055.

4. NATURE OF PROBLEM SOLVED

RHEIN is a modular reactor code system for neutron physics calculation.

5. METHOD OF SOLUTION

The calculation routines can be used for the following problems: calculation of cross section sets for infinite medium; zero-dimensional spectrum calculation in diffusion, P1 or B1 approximation; one-dimensional calculation in diffusion, P1 or collision probability approximation; two-dimensional diffusion calculation; cell calculation; zonewise homogenized group collapsing within zero, one or two-dimensional model.

6. RESTRICTIONS OR LIMITATIONS

None noted.

7. TYPICAL RUNNING TIME

On the IBM 3090, test case 1 took 7 seconds; test case 2 took 2 seconds; test case 3 took 66 seconds.

8. COMPUTER HARDWARE REQUIREMENTS

RHEIN runs on the IBM 3090 and ES-1055 computers.

9. COMPUTER SOFTWARE REQUIREMENTS

The code was written in FORTRAN IV. On the IBM 3090, VS FORTRAN 2.1.1 (with the FORTRAN 66 option) was used under the MVS/XA operating system.

10. REFERENCE

a. Included in the documentation:

C. Reiche, H. Barz, B. Kunzmann, E. Seifert, H. Wand. Reactor-Code-System RHEIN fur ESER Computer, ZfK-668, Zentralinstitut fur Kernforschung, Dresden, Germany, April 1989. (in German).

11. CONTENTS OF CODE PACKAGE

Included are the referenced documents and one DS/HD (1.2 MB) 5.25-inch diskette.

12. DATE OF ABSTRACT

March 1991.