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A model describing intra-granular fission gas behaviour in oxide fuel for advanced engineering tools
- Source :
- Journal of Nuclear Materials
- Publication Year :
- 2018
- Publisher :
- Elsevier BV, 2018.
-
Abstract
- The description of intra-granular fission gas behaviour is a fundamental part of any model for the prediction of fission gas release and swelling in nuclear fuel. In this work we present a model describing the evolution of intra-granular fission gas bubbles in terms of bubble number density and average size, coupled to gas release to grain boundaries. The model considers the fundamental processes of single gas atom diffusion, gas bubble nucleation, re-solution and gas atom trapping at bubbles. The model is derived from a detailed cluster dynamics formulation, yet it consists of only three differential equations in its final form; hence, it can be efficiently applied in engineering fuel performance codes while retaining a physical basis. We discuss improvements relative to previous single-size models for intra-granular bubble evolution. We validate the model against experimental data, both in terms of bubble number density and average bubble radius. Lastly, we perform an uncertainty and sensitivity analysis by propagating the uncertainties in the parameters to model results.
- Subjects :
- Nuclear and High Energy Physics
Work (thermodynamics)
Materials science
Fission gas behaviour
Differential equation
Fission
Bubble
Gaseous swelling
02 engineering and technology
7. Clean energy
01 natural sciences
010305 fluids & plasmas
Intra-granular behaviour
0103 physical sciences
Cluster (physics)
General Materials Science
Diffusion (business)
Fuel performance codes
Number density
Nuclear fuel
Fission gas behaviour, Intra-granular behaviour, Oxide fuel, Gaseous swelling, Fuel performance codes
Mechanics
021001 nanoscience & nanotechnology
Oxide fuel
Nuclear Energy and Engineering
0210 nano-technology
Subjects
Details
- ISSN :
- 00223115
- Volume :
- 502
- Database :
- OpenAIRE
- Journal :
- Journal of Nuclear Materials
- Accession number :
- edsair.doi.dedup.....1c267733abd78c5123cc6139e9d9a79f
- Full Text :
- https://doi.org/10.1016/j.jnucmat.2018.02.024