Geometrical aspects of alpha dose rates from UO2 based fuels
Journal article, 2022

Models for calculating dose rates of spherical particles as well as in fuel cracks are important for radionuclide source term estimations. Dose rates from UO2 based fuels were calculated for planar, spherical, and crack geometries. The escape probability for α-particles in spherical UO2 particles was derived as a continuous equation. The dose rate increased with increasing spherical radius due to the decreasing relative volume of the surrounding water layer. The model produced escape probabilities that were closely predicted by the theoretical derivation. It was shown that the dose rate in water filled fuel cracks with width smaller than the range of an α-particle led to dissolution rates that were lower per unit surface area.

Dose rate

UO 2

Radiolytic oxidation

Spherical geometry

Fuel cracks

Alpha particles

Author

Niklas Hansson

Chalmers, Chemistry and Chemical Engineering, Energy and Material

M. Jonsson

Royal Institute of Technology (KTH)

Christian Ekberg

Chalmers, Chemistry and Chemical Engineering, Energy and Material

Kastriot Spahiu

Swedish Nuclear Fuel and Waste Management Company

Chalmers, Chemistry and Chemical Engineering, Energy and Material

Radiation Physics and Chemistry

0969-806X (ISSN) 18790895 (eISSN)

Vol. 199 110336

Subject Categories

Applied Mechanics

Meteorology and Atmospheric Sciences

Other Physics Topics

DOI

10.1016/j.radphyschem.2022.110336

More information

Latest update

7/7/2022 7