1. NAME AND TITLE

RAD 2: Fission Product Radioactivities Calculation.

2. CONTRIBUTOR

General Atomic, San Diego, California.

3. CODING LANGUAGE AND COMPUTER

FORTRAN IV; IBM 7090.

4. NATURE OF PROBLEM SOLVED

RAD 2 was designed for the calculation of fission product activity distributions in a high temperature gas-cooled reactor system. It will perform a variety of bookkeeping calculations for radioactive product decay chains of any desired length.

5. METHOD OF SOLUTION

RAD 2 requires input information concerning the release of each fission product from the fuel material or, alternately, a "diffusion parameter" from which the code system will calculate these release fractions, assuming diffusive release.

6. RESTRICTIONS OR LIMITATIONS

None noted.

7. TYPICAL RUNNING TIME

No effort has been made to ascertain a typical running time. The estimated running time of the packaged sample problem: less than one minute.

8. COMPUTER HARDWARE REQUIREMENTS

RAD 2 was designed for the IBM 7040/7044 and was made operable on standard 32K IBM 7090 equipment with 3 tape units required for I-O and system.

9. COMPUTER SOFTWARE REQUIREMENTS

The IBM 7090 FORTRAN IV Monitor System was used to compile and execute the sample problem.

10. REFERENCE

F. E. Vanslager, "RAD 2, A Computer Program for Calculating Fission Product Radioactivities," GAMD-6519 (July 1965).

11. CONTENTS OF CODE PACKAGE

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

12. DATE OF ABSTRACT

August 1971; reviewed December 1984.

KEYWORD: FISSION PRODUCTS