Geometrical aspects of alpha dose rates from UO2 based fuels
Artikel i vetenskaplig tidskrift, 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

Författare

Niklas Hansson

Chalmers, Kemi och kemiteknik, Energi och material

M. Jonsson

Kungliga Tekniska Högskolan (KTH)

Christian Ekberg

Chalmers, Kemi och kemiteknik, Energi och material

Kastriot Spahiu

Svensk Kärnbränslehantering (SKB)

Chalmers, Kemi och kemiteknik, Energi och material

Radiation Physics and Chemistry

0969-806X (ISSN) 18790895 (eISSN)

Vol. 199 110336

Ämneskategorier

Teknisk mekanik

Meteorologi och atmosfärforskning

Annan fysik

DOI

10.1016/j.radphyschem.2022.110336

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Senast uppdaterat

2022-07-07