Advanced techniques for fuel modelling have progressed considerably in the last decade in part aided due to progress in high-performance computational capability. At the engineering scale, this has resulted in improved mechanistic description within fuel performance codes with a trend to progressively replace empirical models and correlations with physical models that allow, in principle, extension of the predictive capability of the codes beyond the domain for which experimental results are available. As an example, mesoscale codes (at the fuel-grain scale, typically microns) provide predictions of microstructure evolution and determine their impact on fuel properties, describing phenomena such as grain-boundary sweeping, grain growth, bubble nucleation, growth and coalescence, precipitation of solid fission products, their speciation and phase separation. Inclusion of these models within engineering-oriented fuel performance codes offers improved predictions of thermal conductivity, elastic constants, swelling, and fission-gas release under conditions beyond their usual range of validity and creates an exploratory capability. At the OECD Nuclear Energy Agency, the importance of fuel modelling and its improvement through development of phenomenological representations has been recognized, and multiple technical groups related to materials modelling and the support of advanced fuels and safety codes are considering these issues. A prime example is the Working Party on Multiscale Modelling of Fuels and Structural Materials for Nuclear Energy Systems, and in particular the Expert Group on Multiscale Modelling of Fuels, which published in October 2015 a State-of-the-Art Report on Multi-scale Modelling of Nuclear Fuels. To improve the coordination of these activities and to identify future needs within the NEA and in the broader technical world, a workshop on Nuclear fuel modelling in support of safety and performance enhancement for water-cooled reactors was proposed.
The main objectives of the workshop were:
There was no fee for participation in this workshop.
|T. Besmann (USC)||G. Rossiter (NNL)|
|M. Freyss (CEA)||D. Tsurikov (Kurchatov Institute)|
|V. Garat (AREVA)||P. van Uffelen (EC-JRC)|
|C.B. Lee (KAERI)||C. Valot (CEA)|
|S. Middleburgh (Westinghouse)||M. Veshchunov (IAEA)|
|M. Moatti (EDF)||N. Waeckel (EDF)|
|F. Nagase (JAEA)||W. Wiesenack (IFE-HRP)|
|K. Pasamehmetoglu (INL)||B. Wirth (UT-ORNL)|
|M. Petit (IRSN)||K. Yueh (EPRI)|