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Multiscale computer modeling of nuclear fuel properties at radiation and thermal impacts

Jun 27, 2017, 5:30 PM
1h 30m
Poster Area (Yekaterinburg)

Poster Area

Yekaterinburg

POSTER Track 5. Fast Reactor Materials (Fuels and Structures) and Technology Poster Session 1

Speaker

Dr Sergey Starikov (Nuclear Safety Institute of the Russian Academy of Sciences)

Description

Description and prediction of behavior of nuclear engineering materials under operating conditions is one of the challenging goals in actual materials science. To solve this problem, when the restricted experimental information is only available (e.g. for the new kinds of nuclear fuel), the most perspective method seems to be theoretical description based on multiscale approach. In this case the various subtasks are jointly solved on different various time and spatial scales using theoretical physics and computer modeling. The cooperation of different techniques (such as quantum calculations, atomistic simulation, dislocation dynamics, phase field modeling, kinetic equations and continuum mechanics) allows predicting behavior of the nuclear materials in the absence of experimental data in the analyzed range of temperature, fission rate and other external conditions. In this work, we developed multiscale computer models for various types of nuclear fuel: UN, U-Mo, UO2. The work includes several stages of model development: development of a set of novel interatomic potentials; study of primary irradiation damage (collision cascades and radiation track); calculation of basic properties of matter (diffusion coefficients, dislocation and grain boundaries properties, phase transitions); mesoscale model for evolution of phase-structural composition and change of mechanical/thermodynamics properties under operating conditions.

Country/Int. Organization

Russia/Nuclear Safety Institute of the Russian Academy of Sciences

Primary author

Dr Sergey Starikov (Nuclear Safety Institute of the Russian Academy of Sciences)

Co-authors

Mr Alexey DOLGODVOROV (Nuclear Safety Institute of the Russian Academy of Sciences) Dr Alexey Kuksin (Nuclear Safety Institute of the Russian Academy of Sciences) Dr Artem Lunev (Joint Institute for High Temperatures of the Russian Academy of Sciences) Dr Daria Smirnova (Nuclear Safety Institute of the Russian Academy of Sciences) Ms Lada KOLOTOVA (Joint Institute for High Temperatures of the Russian Academy of Sciences) Ms Maria KORNEVA (Joint Institute for High Temperatures of the Russian Academy of Sciences) Mr Pavel Polovnikov (Nuclear Safety Institute of the Russian Academy of Sciences) Mrs Tatiana KOSTYUCHENKO (Joint Institute for High Temperatures of the Russian Academy of Sciences) Mr Vasiliy TSEPLYAEV (Joint Institute for High Temperatures of the Russian Academy of Sciences) Dr Vladimir Ozrin (Nuclear Safety Institute of the Russian Academy of Sciences) Dr Vladimir Tarasov (Nuclear Safety Institute of the Russian Academy of Sciences)

Presentation materials