User's manual for RESRAD version 6.

TL;DR: The Residual Radioactivity (RESRAD) code as discussed by the authors has been used to calculate doses and risks from residual radioactive materials and the procedures for applying these models to calculate operational guidelines for soil contamination.

Abstract: This manual provides information on the design and application of the RESidual RADioactivity (RESRAD) code. It describes the basic models and parameters used in the RESRAD code to calculate doses and risks from residual radioactive materials and the procedures for applying these models to calculate operational guidelines for soil contamination. RESRAD has undergone many improvements to make it more realistic in terms of the models used in the code and the parameters used as defaults. Version 6 contains a total of 145 radionuclides (92 principal and 53 associated radionuclides), and the cutoff half-life for associated radionuclides has been reduced to 1 month. Other major improvements to the RESRAD code include its ability to run uncertainty analyses, additional options for graphical and text output, a better dose conversion factor editor, updated databases, a better groundwater transport model for long decay chains, an external ground radiation pathway model, an inhalation area factor model, time-integration of dose and risk, and a better graphical user interface. In addition, RESRAD has been benchmarked against other codes in the environmental assessment and site cleanup arena, and RESRAD models have been verified and validated.

Figures

TABLE 2.1 Potential Pathways

FIGURE A.1 Exposure Geometry Considered for Area Factor Calculation

TABLE D.5 Aquatic Bioaccumulation Factors (FWRi6k) for Fresh Water

TABLE A.1 (Cont.)

FIGURE 5.1 Observed and RESRAD-Predicted Beef Concentrations

FIGURE 2.2 Schematic Representation of RESRAD Pathways

TABLE D.2 Dietary Factors (DFpk) for Human Food Consumption

TABLE D.1 (Cont.)

TABLE B.1 (Cont.)

TABLE A.1 (Cont.)

FIGURE A.2 Cross Section of Exposure Geometry Showing Element of Integration for Area Factor Calculation

TABLE A.2 (Cont.)

TABLE B.2 Coefficients for the Inhalation Pathway Area Factor for a Particle Size of 1 µm

TABLE 2.2 Pathways to be Considered for the Resident Farmer, Suburban Resident, Industrial Worker, and Recreationist Scenarios

TABLE A.3 Dependent Variables and Discrete Values Used in Area Factor Calculations

TABLE B.1 (Cont.)

TABLE D.3 Vegetable/Soil Transfer Factors (Bjv) for Root Uptake

TABLE C.1 Ranges of Parameters Affecting Radon Concentrations in Air from Water Use in the Home

TABLE D.6 RESRAD Default Storage Times for Food

TABLE D.1 (Cont.)

FIGURE 2.1 Geometry of Contaminated Zone

Full text

ANL/EAD-4
User’s Manual for RESRAD Version 6
Environmental Assessment Division
Argonne National Laboratory
Operated by The University of Chicago,
under Contract W-31-109-Eng-38, for the
United States Department of Energy

Argonne National Laboratory
Argonne National Laboratory, with facilities in the states of Illinois and Idaho, is
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of Chicago under the provisions of a contract with the Department of Energy.
This technical report is a product of Argonne’s Environmental Assessment
Division (EAD). For information on the division's scientific and engineering
activities, contact:
Director, Environmental Assessment Division
Argonne National Laboratory
Argonne, Illinois 60439-4815
Telephone (630) 252-3107
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and Publishing Division (for more information, see IPD’s home page:
http://www.ipd.anl.gov/).
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This report was prepared as an account of work sponsored by an agency of the
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* Wallo and Peterson are affiliated with the Office of Environmental Policy and Assistance and Williams with
the Office of Site Closure, U.S. Department of Energy, Washington, D.C.
ANL/EAD-4
User’s Manual for RESRAD Version 6
by C. Yu, A.J. Zielen, J.-J. Cheng, D.J. LePoire, E. Gnanapragasam, S. Kamboj,
J. Arnish, A. Wallo III,* W.A. Williams,* and H. Peterson*
Environmental Assessment Division
Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439
July 2001
Work sponsored by U.S. Department of Energy, Assistant Secretary for Environment,
Safety and Health, Office of Environmental Policy and Assistance, and Assistant Secretary
for Environmental Management, Office of Site Closure

This report is printed on recycled paper.

iii
CONTENTS
PREFACE .............................................................. xi
ACKNOWLEDGMENTS .................................................. xv
DOE FOREWORD ....................................................... xvii
NOTATION ............................................................. xxi
ABSTRACT............................................................. 1-1
1 INTRODUCTION ..................................................... 1-3
2 PATHWAY ANALYSIS ................................................ 2-1
2.1 Source Terms .................................................... 2-2
2.1.1 Geometry of the Contaminated Zone ............................ 2-2
2.1.2 Time Dependence ........................................... 2-3
2.1.3 Redistribution .............................................. 2-3
2.2 Pathways ........................................................ 2-3
2.2.1 Pathway Identification ....................................... 2-3
2.2.2 External Radiation Pathways .................................. 2-6
2.2.3 Inhalation Pathways ......................................... 2-6
2.2.4 Ingestion Pathways .......................................... 2-7
2.2.4.1 Food Pathways ...................................... 2-7
2.2.4.2 Water Pathway Segments .............................. 2-9
2.2.4.3 Drinking Water Pathway .............................. 2-12
2.2.4.4 Soil Ingestion Pathway................................ 2-12
2.3 Dose Conversion Factors ........................................... 2-12
2.3.1 Ingestion and Inhalation ...................................... 2-13
2.3.2 External Radiation .......................................... 2-15
2.4 Exposure Scenarios................................................ 2-16
2.4.1 Resident Farmer Scenario ..................................... 2-16
2.4.2 Suburban Resident, Industrial Worker, and Recreationist Scenarios .... 2-20
3 GUIDELINES FOR RADIONUCLIDE CONCENTRATIONS IN SOIL .......... 3-1
3.1 Radiological Release Criteria ........................................ 3-1
3.2 Dose/Source Concentration Ratios for Uniform Contamination ............. 3-11
3.2.1 Dose Conversion Factors ..................................... 3-14
3.2.2 Environmental Transport Factors ............................... 3-15
3.2.3 Source Factors .............................................. 3-16
3.3 Guidelines for Inhomogeneous Contamination .......................... 3-16

Frequently asked questions

Q1. What are the contributions in this paper?

This manual provides information on the design and application of the RESidual RADioactivity ( RESRAD ) code.