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Updated: May 6, 2026

Irradiator Commissioning and Dosimetry for Assessment of LQ α and β Parameters, Radiation Dosing Schema, and in vivo Dose Deposition
Published on: March 11, 2021
Parameter uncertainty and sensitivity in a liquid-effluent dose model
1Department of Nuclear Engineering Sciences, University of Florida, 32611, Gainesville, FL, USA.
Radioactive materials in the Savannah River, including tritium, strontium-90, cesium-137, and plutonium-239, pose risks. Aquatic food and water consumption are the primary sources of radiation dose uncertainty for exposed individuals.
Area of Science:
- Environmental Science
- Radiological Health
- Nuclear Chemistry
Background:
- Radioactive materials released at the Savannah River Site (SRS) contaminate the Savannah River.
- Tritium, strontium-90, cesium-137, and plutonium-239 are the main contributors to radiation dose for river users.
Purpose of the Study:
- To quantify dose uncertainties from parameter variability in nuclide transport and uptake models.
- To determine parameter sensitivity for liquid pathway exposure models.
Main Methods:
- Utilized liquid pathway exposure models to estimate radiation dose.
- Conducted parameter sensitivity analyses for each exposure model.
- Performed pathway analysis to identify major dose contributors.
Main Results:
- Dose estimates from models span approximately one order of magnitude, indicating significant uncertainty.
- Aquatic food and water consumption account for over 95% of the total individual radiation dose.
- Identified key parameters influencing dose uncertainty.
Conclusions:
- Variability in transport and uptake parameters significantly impacts radiation dose assessments.
- Consumption of contaminated aquatic food and water represents the most critical exposure pathway.
- Understanding these uncertainties is crucial for effective radiation protection strategies for Savannah River users.
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