Results 271 to 280 of about 1,821,617 (301)

Mechanisms of swelling and gas release in uranium dioxide

Journal of Nuclear Materials, 1971
Abstract Data on the external dimensional changes and gas release behavior of uranium dioxide irradiated in tungsten-rhenium claddings at surface temperatures from 1325 to 1900 °C are presented. External dimensional changes and gas release fractions increase with increasing temperatures; but the density of the uranium dioxide shows little change ...
R.F. Hilbert, V.W. Storhok, W. Chubb, D.L. Keller   +3 more
openaire   +1 more source

The impact of the volumetric swelling behavior on the water uptake of gas shale

Journal of Natural Gas Science and Engineering, 2018
Water uptake of gas shales is commonly considered one of the most important factors responsible for fluid loss during flowback operations after hydraulic fracturing. Imbibition experiments cover a key role in this context to analyze the impact of several
Lyesse Laloui, Alessio Ferrari
exaly   +2 more sources

Gas-induced swelling of beryllium implanted with deuterium ions

Journal of Nuclear Materials, 1996
Abstract 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, V.Kh. Alimov, A.V. Markin, A.E. Gorodetsky, S.L. Kanashenko, A.P. Zakharov, I.B. Kupriyanov   +6 more
openaire   +1 more source

A Statistical Fuel Swelling and Fission Gas Release Model

Nuclear Applications and Technology, 1970
AbstractA 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
openaire   +1 more source

Estimating Swelling in Oil-Based Mud Due to Gas Kick Dissolution

Volume 11: Petroleum Technology, 2020
Abstract 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, Abu Rashid Hasan, Omer Kaldirim, Nazmul Rahmani, Mohammad Azizur Rahman   +4 more
openaire   +1 more source

Fission gas release and swelling in UO2 doped with Cr2O3

Journal of Nuclear Materials, 1980
Abstract 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 ...
openaire   +1 more source

A theory of the coalescence of gas bubbles under conditions of swelling

Journal of Nuclear Energy. Parts A/B. Reactor Science and Technology, 1965
Abstract In the later stages of decomposition of a supersaturated solid solution, an important role is played by the dissolution of grains of new phase dispersed throughout the solution (coalescence). In the present work the kinetics of this process is investigated for swelling, where the grains of new phase are bubbles containing inert gas.
openaire   +1 more source

New Approach for Simultaneous Measurement of Gas Absorption and Swelling

Industrial & Engineering Chemistry Research, 2011
For 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
openaire   +1 more source

Complications in investigations of the swelling of hydrogel matrices due to the presence of trapped gas

Journal of Controlled Release, 1998
In recent studies, NMR imaging has been used to investigate the swelling of hydroxypropylmethylcellulose (HPMC) tablets and to determine polymer concentration distributions in the swollen matrix. The total amount of polymer in the system was computed from these distributions and was up to 35% greater than the known weight of HPMC in the tablet.
C A, Fyfe, A I, Blazek
openaire   +2 more sources

Investigations on swelling and fission gas behaviour in uranium dioxide

Journal of Nuclear Materials, 1978
Abstract UO2 irradiated at temperatures between 1000 and 2100 K was investigated with respect to fission gas behaviour and swelling. The amount of fission gas was measured in three steps as released fission gas, fission gas retained in bubbles and pores, and fission gas in the fuel matrix. The retained fission gas reaches concentrations up to 1.6 ×
openaire   +1 more source