NESC0926 PABLM.

1. NAME OR DESIGNATION OF PROGRAM:  PABLM.

3. DESCRIPTION OF PROBLEM OR FUNCTION

PABLM calculates internal radiation doses to man from radionuclides in food products and external radiation doses from radionuclides in the environment. Radiation doses from radionuclides in the environment may be calculated from deposition on the soil or plants during an atmospheric or liquid release, or from exposure to residual radionuclides after the releases have ended. Radioactive decay is considered during the release, after deposition, and during holdup of food after harvest. The radiation dose models consider exposure to radionuclides deposited on the ground or crops from contaminated  air or irrigation water, radionuclides in contaminated drinking water, aquatic foods raised in contaminated water, and radionuclides in bodies of water and sediments where people might fish, boat, or swim. For vegetation, the radiation dose model considers both direct deposition and uptake through roots. Doses may be calculated for either a maximum-exposed individual or for a population group. The program is designed to calculate accumulated radiation doses from the chronic ingestion of food products that contain radionuclides and doses from the external exposure to radionuclides in the environment. A first-year committed dose is calculated as well as an integrated dose for a selected number of years.

4. METHOD OF SOLUTION

A chain decay scheme including branching for transitions to and from isomeric states is used for radioactive decay. The equations for calculating internal radiation doses are derived from those given by the International Commission on Radio- logical Protection (ICRP) for body burdens and the maximum possible  concentration (MPC) for each radionuclide. These doses are calculated as a function of radionuclide concentration in food products, ingestion rates, and a radionuclide-specific dose- commitment factor. Radiation doses from external exposure to contaminated water and soil are calculated using the basic assumption that the contaminated medium is large enough to be considered an "infinite" volume or plane relative to the range of the emitted radiation. The equations for calculation of the radiation dose from external exposure to shoreline sediments include a correction for the finite width of the contaminated beach.

5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

Maxima of -
   23 possible body organs or tissues
   19 ingestion pathways
    5 organs and 100 radionuclides in a mixture
    4 external exposure pathways

6. TYPICAL RUNNING TIME

NESC executed the sample problems in 2 minutes of CP time on a UNIVAC1100/44.
NEA-DB executed the test case on UNIVAC 1100 in 20 CPU seconds.

7. UNUSUAL FEATURES OF THE PROGRAM:

8. RELATED AND AUXILIARY PROGRAMS

ARRRG,FOOD (NESC Abstract 925) performs related calculations restricted to a one-year dose and a committed dose from one year of exposure. Other programs which compute organ dose factors include: AERIN (NESC Abstract 908), which calculates organ and tissue burdens resulting from acute exposure to a radioactive aerosol, DACRIN which calculates organ dose from acute or chronic radionuclide inhalation, and SUBDOSA (NESC Abstract 924), which calculates external dose from atmospheric release of radio- nuclides.

10. REFERENCES

International Commission on Radiological Protection, Report of ICRP
Committee II on Permissible Dose for Internal Radiation,
ICRP Publication 2, Pergamon press, New York, 1959.

- B.A. Napier, W.E. Kennedy Jr. and J.K. Soldat:
  PABLM - A Computer Program to Calculate Accumulated Radiation
  Doses from Radionuclides in the Environment.
  PNL-3209  UC-70   (March 1980).

11. MACHINE REQUIREMENTS

80,000 words of memory are required to execute the PABLM program.

13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED:  EXEC 8.

14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS

This
program should be compiled under the ASCII (FTN) compiler. Addresses of variables in the PABLM program exceed 65K. The user must use the  0 option on the FTN card and the E option on the MAP card.

15. NAME AND ESTABLISHMENT OF AUTHOR

             B.A. Napier*, W.E. Kennedy, Jr.,
             and J.K. Soldat
             Pacific Northwest Laboratories
             Battelle
             P.O. Box 999
             Richland, Washington 99352
* Contact

File name	File description	Records
NESC0926_01.003	PABLM INFORMATION FILE	58
NESC0926_01.004	PABLM SOURCE CARD IMAGES (FORTRAN-4)	2516
NESC0926_01.005	PABLM JCL FOR TEST CASE EXECUTION	92
NESC0926_01.006	PABLM INPUT DATA FOR TEST CASE	30
NESC0926_01.007	RMDLIB LIBRARY (FORMATTED, UNIT 10)	288
NESC0926_01.008	ORGLIB LIBRARY (FORMATTED, UNIT 11)	1998
NESC0926_01.009	BIOAC LIBRARY (FORMATTED, UNIT 14)	69
NESC0926_01.010	GRDLIB LIBRARY (FORMATTED, UNIT 16)	209
NESC0926_01.011	FTRANSLIB LIBRARY (FORMATTED, UNIT 12)	70
NESC0926_01.012	PABLM OUTPUT OF TEST CASE	755