Analytical Modeling of Fission Product Releases by Diffusion from Multicoated Fuel Particles | Zendy

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Analytical Modeling of Fission Product Releases by Diffusion from Multicoated Fuel Particles

Author(s) -

Fred Gelbard

Publication year - 2003

Publication title -

osti oai (u.s. department of energy office of scientific and technical information)

Language(s) - English

Resource type - Reports

DOI - 10.2172/809605

Subject(s) - nuclear fission product , fission , diffusion , particle (ecology) , coating , fission products , layer (electronics) , homogeneous , materials science , simple (philosophy) , product (mathematics) , nuclear engineering , mechanics , chemical engineering , chemistry , composite material , thermodynamics , nuclear physics , physics , engineering , mathematics , geometry , oceanography , neutron , geology , philosophy , epistemology

Three levels of fission product diffusional release models are solved exactly. First, the Booth model for a homogeneous uncoated spherical fuel particle is presented and an improved implementation is suggested. Second, the release from a fuel particle with a single barrier layer is derived as a simple alternative to account for a coating layer. Third, the general case of release from a multicoated fuel particle is derived and applied to a TRISO-coated fuel. Previous approaches required approximate numerical solutions for the case of an arbitrary number of coatings with arbitrary diffusivities and arbitrary coating interface conditions

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