1. NAME AND TITLE

RADSYS: Code System for Radioactivity Buildup and Radioactive Waste Generation Calculations.

AUXILIARY ROUTINES:

RADSYS: Calculates flow rates in pipelines and fluid accumulations.

RADTRAN: Calculates fluid and surface concentrations at every graph node.

2. CONTRIBUTOR

Institute for Electrical Power Research, Budapest, Hungary.

3. CODING LANGUAGE AND COMPUTER

Fortran IV, IBM.

4. NATURE OF PROBLEM SOLVED

The RADSYS system simulates the operation of nuclear power stations' water systems. The RADSYS program calculates flow rates in pipelines, coolant quantities accumulating in the tanks, regenerating and decontaminating reagent's concentrations, and the corrosion and fission product activity of coolant surfaces. RADTRAN has been used to examine the effect of pH and high-temperature filtration on activation. The two programs may be used independently and contain certain common routines.

5. METHOD OF SOLUTION

RADSYS calculates fluid accumulation at every node and the concentration in some of them. Using a finite difference method, concentrations are calculated for those tanks which contain regenerating and decontaminating reagents. RADTRAN calculates fluid and surface concentrations at every graph node using the Runge-Kutta method.

6. RESTRICTIONS OR LIMITATIONS

The limitations are subject to the dimensioning of variables in the program.

7. TYPICAL RUNNING TIME

The RADSYS program took about 15 seconds on the IBM 3033 using the RSSAMPLE sample input. RADTRAN took 1 minute and 31 seconds on the IBM 3033 using the RADATA7 sample input.

8. COMPUTER HARDWARE REQUIREMENTS

The code was tested on the IBM 3033 computer at RSIC.

9. COMPUTER SOFTWARE REQUIREMENTS

Under the MVS operating system, RSIC used the IBM VS compiler with the language level 66 option to execute the sample cases.

10. REFERENCE

G. L. Horvath, "RADSYS-RADTRAN: A Computer Code for Radioactivity Build-up and Radioactive Waste Generation Calculations," IEPR 93.93-030-4 (September 1983).

11. CONTENTS OF CODE PACKAGE

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

12. DATE OF ABSTRACT

July 1988.