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Grain Subdivision Fission Gas Swelling Model for UO2
MRS Advances, 2016Under high burnup UO2 fuel pellets can experience high burnup structure (HBS) at the rim also known as rim effect. The HBS is exceptionally porous with fine grain sizes. HBS increases the swelling further than it would have achieved at a larger grain size.
Thomas Winter +2 more
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Theories of Swelling and Gas Retention in Ceramic Fuels
Nuclear Applications and Technology, 1970AbstractThe development of models of fuel-element performance requires, among other things, a detailed, quantitative understanding of fuel swelling and fission gas release.
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A universal nanoscopic swell behavior model for gas shales
Journal of Natural Gas Science and Engineering, 2017Abstract Hydraulic fracturing to tap unconventional shale gas reservoirs causes a volume change of the active clay minerals matrix in the gas shale structure, resulting in the clogging of the tiny nanopores and consequently undermining the production of the shale gas.
H.R. Ahmed, S.N. Abduljauwad
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A theory of swelling and gas release for reactor materials
Journal of Nuclear Materials, 1964Abstract The physical mechanisms deduced from the direct observation of inert gas bubbles in the electron microscope are used to evolve a model, or theory, for swelling. The model assumes the insolubility of the inert gases and the bodily migration of the gas bubbles, and relies upon the equation of state for the inert gas, upon the surface energy ...
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Re-solution effects and fission gas swelling in UO2
Journal of Nuclear Materials, 1972Abstract A fission gas swelling model is proposed which enables one to calculate swelling in the vicinity of grain boundary networks and in imperfection-free regions. The grain boundary swelling requires a knowledge of the gas accumulation and the reaction-rate at the boundary. The gas accumulation was calculated by deriving a modified form of Fick's
C.C. Dollins, H. Ocken
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A Statistical Fuel Swelling and Fission Gas Release Model
Nuclear Applications and Technology, 1970AbstractA computer simulation of a fuel region has been developed based on movement of fission gas bubbles in solids under a thermal gradient. Within this region, fission gas events are followed via a Monte Carlo technique. Individual bubbles are followed through their time history from nucleation to release from the fuel, with interactions at ...
H. R. Warner, F. A. Nichols
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Effect of gas atoms on swelling of austenitic stainless steel
Journal of Nuclear Materials, 1994Abstract There have been many studies on the effect of He on swelling, however not so many on the effect of nitrogen on swelling. In this study the effect of nitrogen on swelling of 316 steel was investigated under HVEM irradiation for establishing a model of swelling.
N. Igata +3 more
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Gas-induced swelling of beryllium implanted with deuterium ions
Journal of Nuclear Materials, 1996Abstract An extensive TEM study of the microstructure of Be TIP-30 irradiated with 3 and 10 keV D ions up to fluences, Φ, in the range from 3 × 10 20 to 8 × 10 21 D/m 2 at temperatures, T irr = 300, 500 and 700 K has been carried out. Depth distributions of deuterium in a form of separate D atoms and D 2 molecules have been investigated by ...
V.N. Chernikov +6 more
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Estimating Swelling in Oil-Based Mud Due to Gas Kick Dissolution
Volume 11: Petroleum Technology, 2020Abstract Gas kick is an ever-present hazard whose importance is magnified for offshore drilling situations. Modeling gas kick is a complex problem that requires an understanding of the relevant fluid dynamics as well as the solubility of natural gas in oil-based muds (OBM).
Kaushik Manikonda +4 more
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Fission gas release and swelling in UO2 doped with Cr2O3
Journal of Nuclear Materials, 1980Abstract UO 2 doped with 0.5 wt% Cr 2 O 3 has been irradiated at 1500°C to three differing burn-ups to a maximum of 0.45% FIMA. The gas release and swelling have been compared with a reference fuel and found to be similar. To explain the results it is necessary to assume both an enhanced gas diffusion rate and a reduced grain boundary surface ...
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