1. NAME AND TITLE

RACC: A Code System for Computing Radioactivity-Related Parameters for Fusion Reactor Systems.

2. CONTRIBUTOR

Argonne National Laboratory, Argonne, Illinois.

3. CODING LANGUAGE AND COMPUTER

Fortran IV; IBM 370/3033.

4. NATURE OF PROBLEM SOLVED

RACC provides a comprehensive computational capability for the calculation of radioactivity and

radioactivity-related parameters (e.g., biological hazard measure, decay heat, decay gamma-ray yield, etc.) in general fusion reactor systems. This capability can be utilized in nearly all types of fusion reactor design and analysis including very near-term machines and commercial reactors. RACC can enable the fusion community to routinely include the radioactivity-related aspects as an important part of safety, environmental, and economic analysis.

5. METHOD OF SOLUTION

The basic computational technique used by RACC is Gear's stiffly stable matrix method, but the Adams method is available, also. The RACC code features a versatile geometric capability including slab, sphere, cylinder, and torus in multidimensions. In addition to the regular geometries, an option is available for an arbitrary geometry (IGE = 0), presumably useful for radioactivity calculations with Monte Carlo neutron transport fluxes for which the system configuration cannot be represented by any of the four regular geometries.

RACC is capable of interfacing with most of the standard multigroup, multidimensional neutron/photon transport code systems currently available for fusion-system application. All input arrays are read using the FIDO routines.

6. RESTRICTIONS OR LIMITATIONS

None noted.

7. TYPICAL RUNNING TIME

No study has been made by RSIC of typical running times for RACC.

8. COMPUTER HARDWARE REQUIREMENTS

RACC is operable on the IBM 370/3033 computer.

9. COMPUTER SOFTWARE REQUIREMENTS

A Fortran IV compiler is required.

10. REFERENCE

J. Jung, "Theory and Use of the Radioactivity Code RACC," ANL/FPP/TM-122 (May 1979).

11. CONTENTS OF CODE PACKAGE

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

12. DATE OF ABSTRACT

February 1982; revised February 1983.