CCC-0422 RADRISK.

1. NAME OR DESIGNATION OF PROGRAM:  RADRISK.

3. DESCRIPTION OF PROGRAM OR FUNCTION

RADRISK estimates radiation dose rates to various human organs from inhalation or ingestion of radioactive materials, and the health effects in a reference population as a result of this exposure.

4. METHOD OF SOLUTION

The amount or radioactive material present in various organs as a function of time is computed by solving a set of differential equations. This activity is multiplied by dosimetric S  factors to compute the dose rate. The dose rates over the lifetime of the cohort are then processed through a life-table actuarial analysis to estimate incremental cancer deaths in the cohort, taking into consideration all competing risks.

5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM:

6. TYPICAL RUNNING TIME

Running time will depend on the nature of the exposure case of concern. Illustrative examples are given below for  a wide range of radionuclides; each case consists of chronic inhalation of the given radionuclide over the lifetime of the cohort. Some example cases include: Pu-239, which with 1 significant nuclide in the decay chain took 1.5 seconds of CPU time, Pb-210 with 3 significant nuclides in the decay chain took 3 CPU seconds, and Ra-226 with 9 signficant nuclides in the decay chain took 20 CPU seconds. RADRISK requires 16 CPU seconds to compile, 1 CPU second to link and the sample problem executes in 5 CPU seconds.

NEA-DB executed the test case included in the package on IBM 3081K in 3.4 CPU seconds.

7. UNUSUAL FEATURES OF THE PROGRAM:

8. RELATED AND AUXILIARY PROGRAMS

RADRISK has been developed as a synthesis of the programs INREM-II (CCC-0392) and CAIRD.

10. REFERENCES

- R.E. Sullivan, N.S. Nelson, W.H. Ellett, D.E. Dunning, Jr., R.W. Leggett, M.G. Yalcintas, K.F. Eckerman:
"Estimates of Health Risk from Exposure to Radioactive Pollutants" ORNL/TM-7745 (1981)

- D.E. Dunning Jr., R.W. Leggett and M.G. Yalcintas:
A Combined Methodology for Estimating Dose Rates and Health Effects from
Exposure to Radioactive Pollutants. ORNL/TM-7105  (December 1980)

11. MACHINE REQUIREMENTS

RADRISK compiles and executes in 350K bytes on the IBM 3033.

13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED

An IBM OS/VS Assembler and FORTRAN H Extended Enhanced compiler are required.

14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS:

15. NAME AND ESTABLISHMENT OF AUTHORS

Developed by: D.E. Dunning, Jr., R.W. Leggett, and M.G. Yalcintas
Contributed by: Radiation Safety Information Computational Center
                Oak Ridge National Laboratory
                Ok Ridge, Tennessee, U. S. A.

File name	File description	Records
CCC0422_01.003	RADRISK INFORMATION FILE	48
CCC0422_01.004	RADRISK SOURCE IN CARD-IMAGE FORMAT	3180
CCC0422_01.006	RADRISK ASSEMBLER ROUTINES	102
CCC0422_01.007	JCL TO RUN TEST CASES	86
CCC0422_01.008	LIFTBL TEST CASE INPUT DATA	333
CCC0422_01.009	RADRSK TEST CASE INPUT DATA	334
CCC0422_01.010	RADRISK OUTPUT ON UNIT 6	608
CCC0422_01.011	RADRISK OUTPUT ON UNIT 16	198