1. NAME AND TITLE

DACRIN: Airborne Radionuclide Organ Dose Calculational System.

DATA LIBRARIES

RMDLIB: Isotope Data Library.

ORGLIB: Organ Data Library.

2. CONTRIBUTOR

Battelle Memorial Institute, Pacific Northwest Laboratories, Richland, Washington.

3. CODING LANGUAGE AND COMPUTER

FORTRAN IV; UNIVAC 1100/44.

4. NATURE OF PROBLEM SOLVED

DACRIN incorporates the lung model proposed by the ICRP Task Group on Lung Dynamics to calculate organ doses resulting from inhalation of a radioactive aerosol. Doses are calculated as a function of distance from release point, atmospheric stability and wind speed for a specified radionuclide inventory. The duration of the uptake period and the dose time are variable.

5. METHOD OF SOLUTION

Analytic solutions to the problem have been developed. No special mathematical or numerical techniques were required.

6. RESTRICTIONS OR LIMITATIONS

Each case has the following dimensional limitations:

Number of nuclides 600

Number of organs 10

(19 organs from which to choose)

Number of downwind distances 10

Number of uptake periods 5

Number of dose times 10

Number of members in a decay chain 7

Numerical limitations include:

One positive distance must be specified.

One positive uptake time must be specified.

Dose times must be greater than 1 minute.

At least one nuclide must be specified with non-zero activity.

At least one organ must be specified.

7. TYPICAL RUNNING TIME

The running time depends mainly on the number of release periods, the number of nuclides in the inventory, the number of dose times and the number of distances. The data libraries take about 13 seconds to read (read only once per run).

8. COMPUTER HARDWARE REQUIREMENTS

The code was originally designed to run on the CYBER 74; was converted to run on the UNIVAC 1100/44 computer.

9. COMPUTER SOFTWARE REQUIREMENTS

The code requires a UNIVAC operating system and a FORTRAN IV compiler.

10. REFERENCES

D. Strenge, "Informal Notes" (January 1981).

Errata, BNWL-B-389 (December 1977).

J. R. Houston, D. L. Strenge, and E. C. Watson, "DACRIN - A Computer Program for Calculating Organ Dose from Chronic Radionuclide Inhalation," BNWL-B-389 (reissued April 1976).

11. CONTENTS OF CODE PACKAGE

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

12. DATE OF ABSTRACT

November 1981; revised February 1982 and January 1985.

KEYWORDS: RADIONUCLIDES; INTERNAL DOSE; AIRBORNE; ENVIRONMENTAL DOSE