Site-specific parameter values for the Nuclear Regulatory Commission's food pathway dose model

Area of Science:

• Environmental Science
• Radiation Protection
• Nuclear Engineering

Background:

• Routine Savannah River Site (SRS) operations release radionuclides, necessitating dose assessments.
• Current dose estimations rely on Nuclear Regulatory Commission (NRC) models with default parameters.
• Lack of site-specific data can impact the accuracy of off-site radiation dose calculations.

Purpose of the Study:

• To determine site-specific land and water use parameters for the Savannah River area.
• To refine dosimetric models used for estimating off-site radiation doses from SRS.
• To compare dose estimates derived from site-specific data versus NRC default values.

Main Methods:

• Conducted a survey of local land and water use characteristics.
• Collected data on agricultural production, river activities, and consumption rates (meat, milk, vegetables, seafood).
• Applied NRC Regulatory Guide 1.109 (1977) dosimetric models using both site-specific and default parameters.

Main Results:

• Site-specific parameters for agriculture, recreation, and consumption were established for the Savannah River area.
• Dose estimates were calculated using both site-specific and default NRC parameter values.
• The study quantifies the impact of using site-specific data on off-site radiation dose estimations.

Conclusions:

• Site-specific data collection is crucial for accurate off-site radiation dose assessments at facilities like SRS.
• Utilizing local parameters significantly refines dose estimates compared to generic NRC defaults.
• This approach enhances the reliability of environmental radiation monitoring and risk assessment.