Estimating Derived Response Levels at the Savannah River Site for Use with Emergency Response Models
A. A. Simpkins
Emergency response computer models at the Savannah River Site (SRS) are coupled with realtime meteorological data to estimate dose to individuals downwind of accidental radioactive releases. Currently, these models estimate doses for inhalation and shine pathways, but do not consider dose due to ingestion of contaminated food products. The Food and Drug Administration (FDA) has developed derived intervention levels (DIL) which refer to the radionuclide-specific concentration in food present throughout the relevant period of time, with no intervention, that could lead to an individual receiving a radiation dose equal to the protective action guide. In the event of an emergency, concentrations in various food types are compared with these levels to make interdictions decisions. Prior to monitoring results being available, concentrations in the environmental media (i.e., soil), called derived response levels (DRLs), can be estimated from the DILs and directly compared with computer output to provide preliminary guidance as to whether intervention is necessary. Site-specific derived response levels (DRLs) are developed for ingestion pathways pertinent to SRS: milk, meat, fish, grain, produce, and beverage. This provides decision-makers with an additional tool for use immediately following an accident prior to the acquisition of food monitoring data.
This abstract was presented at the 36th Annual Midyear Meeting, "Radiation Safety Aspects of Homeland Security and Emergency Response", Poster Session, 1/26/2003 - 1/29/2003, held in San Antonio, TX.