Results 171 to 180 of about 187,646 (209)
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Recrystallization and fission-gas-bubble swelling of U–Mo fuel
Journal of Nuclear Materials, 2013Abstract At high burnup, U–Mo fuel exhibits some form of recrystallization, by which fuel grains are subdivided. The effect of grain subdivision is to effectively enhance fission gas bubble (FGB) swelling due to increased grain boundaries. Inter-granular FGB swelling, i.e., FGB formation and growth at the grain boundaries, is much larger than the ...
Yeon Soo Kim, G.L. Hofman, J.S. Cheon
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Gas-induced swelling in helium-implanted copper during annealing
Journal of Nuclear Materials, 1992A detailed transmission electron microscopy (TEM) investigation of the gas porosity (GP) in pure copper homogeneously implanted with helium at 323 K to a concentration of cHe ⋍ 300 appm as a result of postimplantation annealing for up to 0.5 h at temperatures between 838 and 1193 K has been carried out.
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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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New Approach for Simultaneous Measurement of Gas Absorption and Swelling
Industrial & Engineering Chemistry Research, 2011For sorption measurements many different methods are applicable, but nearly all of them require a correction of the raw experimental data by a factor including the sample’s volume.
Tobias M. Fieback, Frieder Dreisbach
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Swelling of Oil-Based Drilling Fluids Resulting From Dissolved Gas
SPE Drilling Engineering, 1990SUMMARY The method presented in this paper uses an experimentally calibrated equation-of-state (EOS) model to estimate the swelling of oil-based drilling fluids caused by dissolved methane. With this method, the pit gain associated with a given kick size can be determined. The calculation method was verified by experiments conducted in a
Patrick L. O'Bryan, Adam T. Bourgoyne
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Modeling gas-adsorption-induced swelling and permeability changes in coals
International Journal of Coal Geology, 2014Abstract The swelling of a coal matrix as the result of gas adsorption can have important implications in operations related to the production of coalbed gases and the sequestration of greenhouse gases in coalbeds. In view of this, we undertook a modeling study to describe the relationships among gas adsorption on coals, coal swelling and ...
Pongtorn Chareonsuppanimit +3 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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Fission gas swelling and long-range migration at low temperatures
Journal of Nuclear Materials, 1973Abstract Fission gas behavior at temperatures below ~ 1100°C is assumed to consist of gas bubble nucleation and coalescence through random motion of the bubbles and then complete bubble destruction by subsequent fission events. A model is proposed describing the gas behavior based on a modified form of Van der Waals gas law for very small bubbles.
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Contribution of polymeric swelling to the overall response of capacitive gas sensors
Analytical and Bioanalytical Chemistry, 2013A new method for investigation of the swelling of polymers on exposure to gas or vapour has been devised and tested. It uses an optical profilometer (based on the chromatic aberration of a lens system) which is integrated into a computer-controlled gas-dosing and mixing setup. Gas and/or vapour concentration-dependent measurements have been carried out
Altenberend, Ulrike +3 more
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Diffusion controlled swelling of reservoir oil by direct contact with injection gas
Chemical Engineering Science, 1991Abstract An approximate analytical solution has been developed to describe the diffusion controlled swelling of reservoir oil when it is directly contacted by an injection gas such as CO 2 . The solution is based on the assumption of a variable power profile for the gas concentration in the oil phase which considerably simplifies the mathematical ...
Do, H. D., Pinczewski, W. V.
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