Results 181 to 190 of about 585 (207)

Investigation of the elemental composition of surrogates of fuel-containing materials by nuclear microanalysis

Atomic Energy, 2007
Nuclear microanalysis was used to determine the elemental composition of individual components of the batch for synthesizing surrogates for the lava-like fuel-containing mass and to determine the composition of the surrogates themselves. The elemental composition of the surrogates obtained is compared with that of the real materials.
V. N. Bondarenko, A. V. Goncharov, I. M. Karnaukhov, A. V. Mazilov, V. M. Pistryak, V. I. Sukhostavets, A. G. Tolstolutskii, K. G. Rudya   +7 more
openaire   +1 more source

Regression Rates of Solid Fuels Containing High Nitrogen (HiN) Materials

47th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, 2011
The combustion behavior of novel energetic formulations in solid fuels to replace conventional, low-energy, binders such as hydroxyl-terminated polybutadiene (HTPB) were examined. The proposed solid fuels will provide higher enthalpy, higher density, and improved rocket engine performance.
Grant Risha, Amber Miller, Russell Glass, Vincent Yeager, Martin Chiaverini, Bryce Tappan   +5 more
openaire   +1 more source

Mathematical model of the process of electrodiffusion of radionuclides in lavalike fuel-containing materials

Journal of Mathematical Sciences, 2012
We propose a model for the quantitative description of the diffusion of radioactive admixtures in fuel-containing materials based on the analysis of the processes of electrolytic dissociation and electrodiffusion (in the case of charged admixtures) with regard for thermal and electromagnetic processes.
Ya. I. Burak, O. R. Hachkevych, M. T. Solodyak   +2 more
openaire   +1 more source

Processes of vertical diffusion of radionuclides in a layer of a lava-like fuel-containing material

Journal of Mathematical Sciences, 2012
Using a known model for the quantitative description of diffusion of radioactive impurities in fuel-containing materials and taking into account processes of electrolytic dissociation and electrodiffusion (in the case of charged impurities) in interrelation with thermal and electromagnetic processes, we investigate the vertical diffusion of particles ...
O. R. Hachkevych, М. Т. Solodyak, R. О. Ivas’ko, M. H. Hachkevych   +3 more
openaire   +1 more source

Radioactivity distribution in fuel-containing materials (Chernobyl “lava”) and aerosols from the Chernobyl “Shelter”

Radiation Measurements, 2015
Abstract Homogeneity of the radioactivity distribution, composition and structure of radioactive phases were investigated for several samples of Chernobyl fuel-containing materials (Chernobyl “lava”) collected in different parts of the destroyed reactor building. The spatial distribution of the α- and of the total activity is homogeneous on the scale
Irina Vlasova, Andrey Shiryaev, Boris Ogorodnikov, Boris Burakov, Ekaterina Dolgopolova, Roman Senin, Alexey Averin, Yan Zubavichus, Stepan Kalmykov   +8 more
openaire   +1 more source

Nuclear-hazardous accumulations of fuel-containing materials in the destroyed fourth Unit of the Chernobyl NPP

Radiochemistry, 2011
The neutron incident that happened in June 1990 in the 4th Unit of the Chernobyl NPP, destroyed in the accident, at the boundary of rooms 304/3 and 305/2 is analyzed. One of possible scenarios of the incident, consistently accounting for the dynamics and self-extinguishment of the detected neutron anomaly, is suggested.
E. D. Vysotskii, A. A. Klyuchnikov, A. S. Lagunenko, E. M. Pazukhin, V. N. Shcherbin   +4 more
openaire   +1 more source

Substantiation of the Choice of Threshold Parameters for the System Monitoring the Fuel-Containing Materials in the Object “Cover”

Atomic Energy, 2002
A substantiation is given for the choice of threshold values of the neutron flux density (threshold-1 – “Attention” and threshold-2 – “Danger”), and formulas are derived for calculating these values for systems which are being designed and are currently in operation for monitoring the state of fuel-containing materials in the object “Cover” at the ...
V. V. Avgustov, A. A. Kuchmagra, O. S. Molchanov, G. I. Odinokin, V. N. Shcherbin   +4 more
openaire   +1 more source

Ultrasonic Characterization of Candidate Nuclear used Fuel Container Weld Materials

1987
Ultrasonic inspection of weld cylinders of candidate nuclear used fuel container materials (copper, titanium grades 2 and 12, stainless steel 316, Inconel 625, Hastelloy C-276) using immersion longitudinal waves showed that titanium grades 2 and 12 exhibited essentially isotropic behaviour (little beam skewing).
M. D. C. Moles, J. Imada, M. P. Dolbey
openaire   +1 more source

Forecasting changes in the neutron-physical characteristics of fuel-containing materials

2019
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Borysenko, V.I., Goranchuk, V.V., Sidoruk, N.M.   +2 more
openaire   +1 more source

The Updated Model of Microstructure Evolution of Lava-Like Fuel-Containing Materials of 4th Block of Chornobyl NPP. Brown Ceramics

Ukrainian Journal of Physics, 2021
Модель еволюцiї мiкроструктури лавоподiбних паливовмiсних матерiалiв (ЛПВМ) 4-го блока Чорнобильської АЕС оновлено на прикладi коричневої керамiки. Пiдтверджено, що поведiнка ЛПВМ визначається не одним або декiлькома фiзичними i хiмiчними процесами, а їх взаємозв’язком i взаємовпливом.
Gabielkov, S.V., Zhyganiuk, I.V.
openaire   +1 more source