1. NAME AND TITLE

HADOC: Calculates External and Inhalation Doses from Acute Radionuclide Releases on the Hanford Site.

DATA LIBRARIES

RMDLIB: Radionuclide Master Data Library.

NUCDFL: Dose Conversion Factor Data Library.

2. CONTRIBUTOR

Battelle Pacific Northwest Laboratory, Richland, Washington.

3. CODING LANGUAGE AND COMPUTER

Fortran IV; UNIVAC 1100-70.

4. NATURE OF PROBLEM SOLVED

HADOC (Hanford Acute Dose Calculations) calculates external and inhalation doses resulting from postulated accidental radionuclide releases on the Hanford site. It generates doses to an individual at a specified location and to the population in the region near the Hanford site for specified organs. Doses reported include the maximally exposed individual's dose (by organ and exposure mode) and the total population dose (by organ and exposure mode) in the sector having the highest population exposure factor. The first year and fifty-year dose commitments are reported. Optional reports giving the fractional contribution to total dose by radionuclide for each organ and dose commitment period for a maximally exposed individual and the population may be printed.

5. METHOD OF SOLUTION

Atmospheric dispersion is calculated using the Hanford dispersion model with building wake effects and terrain elevation considered as options. For elevated releases, the worst case dispersion conditions may be determined by considering Pasquill dispersion categories A-F. The maximally exposed individual dispersion factor is calculated using the bivariate Gaussian dispersion equation. The population dose is calculated for the sector having the highest population exposure factor as determined by the dispersion factors and the specified population distribution.

The decay of the released radionuclide activities is considered during transit from the release point to the location of the maximally exposed individual, MI, and to the center of each population ring. Decay times are based on user supplied average wind speeds. A decay chain processor with multiple branching is used to calculate decayed activities.

6. RESTRICTIONS OR LIMITATIONS

The organs available in the NUCDFL library are total body, kidney, liver, bone, lungs, thyroid, and large lower intestine.

7. TYPICAL RUNNING TIME

No study has been made by RSIC of typical running time for HADOC.

8. COMPUTER HARDWARE REQUIREMENTS

HADOC is operable on the UNIVAC 1100-70 computers.

9. COMPUTER SOFTWARE REQUIREMENTS

A Fortran IV compiler is required.

10. REFERENCE

D. L. Strenge and R. A. Peloquin, "HADOC - A Computer Code for Calculation of External and Inhalation Doses from Acute Radionuclide Releases," PNL-3503 (April 1981).

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, plus the data libraries.

12. DATE OF ABSTRACT

March 1984.