United States Nuclear Regulatory Commission - Protecting People and the Environment

Verification of RESRAD-OFFSITE (NUREG/CR-7038, ANL-10/27)

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Publication Information

Manuscript Completed: October 2010
Date Published: October 2011

Prepared by:
C. Yu, E.K. Gnanapragasam, J. J. Cheng, S. Kamboj, B.M. Biwer,
and D.J. LePoire

Argonne National Laboratory
9700 South Cass Avenue
Argonne, IL 60439

John D. Randall, NRC Project Manager

NRC Job Code N6731

Office of Nuclear Regulatory Research
U.S. Nuclear Regulatory Commission
Washington DC 20555-0001

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Abstract

This report documents the procedures used and the results obtained regarding the verification of the RESRAD-OFFSITE computer code. The RESRAD-OFFSITE code is an extension of the original RESRAD (onsite) code. The RESRAD-OFFSITE and RESRAD (onsite) codes share the same database and many models and modules. The RESRAD (onsite) code has already been extensively tested, verified, and validated. Many parameter values used in the RESRAD-OFFSITE code were taken from the RESRAD (onsite) database. These parameters include soil-plant transfer factors, meat and milk transfer factors, bioaccumulation factors, dose conversion factors, decay half-lives, and scenario-specific occupancy factors. The RESRAD (onsite) database is well documented and verified. Components of the RESRAD-OFFSITE code were verified by separately developed spreadsheets or benchmarked against the RESRAD (onsite) code. Independent verification was performed using calculations external to the RESRAD-OFFSITE code. Microsoft Excel® spreadsheets were used to verify all the major portions of the RESRAD-OFFSITE code, including the source term model, groundwater transport model, air dispersion model, and accumulation in offsite soil and in food models.

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