1. NAME AND TITLE

MARINRAD: Code System Model for Assessing the Consequences of Release of Radioactive Material into the Oceans

AUXILIARY ROUTINES

MARRAD: Ocean Transport and Steady-state Food-Chain Concentration Factor Model

MAROUT: Pathways-to-Man Model

2. CONTRIBUTORS

Sandia National Laboratories, Albuquerque, New Mexico.

The Analytical Sciences Corporation, Reading, Massachusetts.

3. CODING LANGUAGE AND COMPUTER

Fortran 77; CDC CYBER 170/855

4. NATURE OF PROBLEM SOLVED

MARINRAD is a system of computer programs designed to evaluate the consequences from release of radioactive waste into the ocean. It has been used for safety assessment studies for the Subseabed Disposal Program, Sandia National Laboratories. It calculates radionuclide concentrations as a function of time, steady-state food-chain concentration factors, dose and health effects to man, and doses to aquatic biota.

5. METHOD OF SOLUTION

The systems model of MARINRAD is divided into three parts. The Ocean Transport Model partitions the ocean into an arbitrary number of sediment and water compartments and computes the concentration of each radionuclide released into the system in each compartment as a function of time (this is done in MARRAD).

The Steady-State Food-Chain Model uses stable element concentration factors to calculate radionuclide concentrations in compartment biota. A food-chain model is used to compute concentration factors for biota that prey on compartment biota but do not reside in that compartment (MARRAD).

The Pathways-to-Man Model calculates dose and health effects for all pathways that lead to exposure to man, including ingestion of aquatic biota, external exposure to contaminated water or sediments, inhalation of airborne spray or shore sediments, and other miscellaneous pathways. Doses to aquatic biota are also calculated (MAROUT).

Nuclide inventory files are required by MARRAD and CCC-371/ORIGEN may be used for their generation. Libraries needed in the execution of the sample problem are provided as part of the package.

6. RESTRICTIONS OR LIMITATIONS

The commercially available DISSPLA software package is used by MAROUT for generating plots.

7. TYPICAL RUNNING TIME

The CPU time for running the MARRAD portion of the sample problem on the CYBER 170/855 was reported to be 119s.

8. COMPUTER HARDWARE REQUIREMENTS

CDC CYBER 170/855 with direct access files.

9. COMPUTER SOFTWARE REQUIREMENTS

Fortran 77 compiler, NOS 2 operating system.

10. REFERENCE

C. M. Koplik, M. F. Kaplan, J. Y. Nalbandian, J. H. Simonson, and P. G. Clark, "User's Guide to MARINRAD: Model for Assessing the Consequences of Release of Radioactive Material into the Oceans," SAND83-7104 (September 1984).

11. CONTENTS OF CODE PACKAGE

Included are the referenced document and one (1.2MB) DOS diskette which contains the source codes, input data, and data libraries needed for sample problem execution, plus output from the sample problem.

12. DATE OF ABSTRACT

December 1987.