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research-article

Multiscale mesoscale modelling of porosity evolution in oxide fuels

[+] Author and Article Information
Michael Welland

Canadian Nuclear Laboratories, Chalk River, Ontario, Canada
michael.welland@cnl.ca

Karen Colins

Canadian Nuclear Laboratories, Chalk River, Ontario, Canada
Karen.Colins@cnl.ca

Nana Ofori-Opoku

Canadian Nuclear Laboratories, Chalk River, Ontario, Canada
nana.ofori-opoku@cnl.ca

Andrew A. Prudil

Canadian Nuclear Laboratories, Chalk River, Ontario, Canada
Andrew.Prudil@cnl.ca

Evan Thomas

Canadian Nuclear Laboratories, Chalk River, Ontario, Canada
thomases@mcmaster.ca

1Corresponding author.

ASME doi:10.1115/1.4044405 History: Received February 08, 2019; Revised July 16, 2019

Abstract

The behavior of fission gas, notably accommodation within intra- and intergranular bubbles, influences the macroscopic properties and overall performance of oxide fuels. This work discusses progress to capture key fission gas-related phenomena with modern mesoscale techniques: the interaction of grain growth and irradiation by a phase-field crystal method; overpressurised intragranular bubble migration in a vacancy gradient by a linearized phase-field model; and intergranular bubble interlinkage and percolation by the included phase model. An outlook on the impact of these models for investigation of unit mechanisms of fission gas behavior and integration of them into fuel-performance codes is presented.

Section 5: Non-US Gov Employees
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