1. NAME AND TITLE

IMPACTS-BRC 2.1: Analyses of Potential Radiological Impacts.

2. CONTRIBUTORS

Sandia National Labs., Albuquerque, NM through the Energy Science and Technology Software Center, Oak Ridge, TN.

3. CODING LANGUAGE AND COMPUTER

FORTRAN 77; IBM PC (C00666IBMPC00).

4. NATURE OF PROBLEM SOLVED

IMPACTS-BRC2.1 is a generic radiological assessment code that allows calculation of potential impacts to maximum individuals, waste disposal workers, and the general population resulting from exemption of very low-level radioactive wastes from regulatory control. The code allows calculations to be made of human exposure to the waste by many pathways and exposure scenarios.

5. METHOD OF SOLUTION

Impacts to individuals and populations are calculated using analytical expressions for the migration of radionuclides along all pathways. The results of these analyses are summed to produce the total impact.

6. RESTRICTIONS OR LIMITATIONS

None noted.

7. TYPICAL RUNNING TIME

Typical running time is a function of the computer used. The sample problem requires less than 5 minutes on an IBM PC.

8. COMPUTER HARDWARE REQUIREMENTS

640K bytes. A math co-processor and fixed disk drive are recommended but not required. Because portions of the output are printed as 128-character lines, a printer with the capacity to handle lines of this length is useful.

9. COMPUTER SOFTWARE REQUIREMENTS

DOS 2.1 or higher, however will not run with DOS 3.2. Programs will run in DOS mode of Windows 95.

10. REFERENCES

a) Included in documentation:

B. L. O'Neal and C. E. Lee, "IMPACTS-BRC, Version 2.0 Program User's Manual," NUREG/CR-5517 (SAND89-3060) (April 1990).

R. R. Rao, M. W. Kozak, J. A. Rollstin, C. P. Harlan, S. D. Bensonhaver, and V. Austin, "IMPACTS-BRC, Version 2.1 Code and Data Verification," NUREG/CR-5797 (SAND91-2226) (April 1992).

b) Background Information:

O. I. Oztunali and G. W. Roles, "De Minimis Waste Impacts Analysis Methodology," NUREG/CR-3585, Vol. 1 (February 1984).

J. M. Forstrom *and D. J. Goode, "De Minimis Waste Impacts Analysis Methodology, IMPACTS-BRC User's Guide and Methodology for Radioactive Wastes Below Regulatory Concern," NUREG/CR-3585, Vol. 2 (July 1986 with December 1986 Errata Sheet).

J. M. Taylor and S. L. Daniel, "RADTRAN: A Computer Code to Analyze Transportation of Radioactive Material," SAND76-0243 (April 1977).

"Final Environmental Impact Statement on 10 CFR Part 61: Liscensing Requirements for Land Disposal of Radioactive Waste," NUREG-0956 (November 1982).

11. CONTENTS OF CODE PACKAGE

Included in the package are the referenced documents in (10.a) and two DS/HD diskettes in DOS format. On one diskette is a README file with instructions on loading the software. Also included are the executables and input files. Output listings are in the Appendix of the Code and Data Verification Manual.

12. DATE OF ABSTRACT

January 1999.

KEYWORDS: ENVIRONMENTAL DOSE; INTERNAL DOSE; LOW-LEVEL RADIOACTIVE WASTE DISPOSAL