Joint-stock Company “tvel”

Bochvar High-tech. Res. Inst. for Inorg. Materials

Bochvari High-tech. Res. Inst. for Inorg. Materials

Bochvar High-technology Research Institute for Inorganic Materials

Vladislav Konstantinovich Orlov

Alexey Vladimirovich Glebov

Ivan Alexandrovich Dzyubinsky

Roman Gennadyevich Zakharov

Alexander Pavlovich Ponomarenko

Sergey Igorevich Ivanov

Leonid Aleksandrovich Karpyuk

Fyodor Viktorovich Makarov

Vladimir Vladimirovich Novikov

Dmitry Vladimirovich Zhigalov

Alexander Olegovich Titov

Michail Yurjevich Kornienko

Alexander Dmitrievich Bagdatyev

Denis Sergeevich Saenko

Alexander Pavlovich Korolev

Nikolay Nikolaevich Krasnobaev

Artem Andreevich Vorobyov

Alexander Alexandrovich Maslov

Dmitry Vladimirovich Kuznetsov

Method of manufacturing an end plug for a nuclear fuel element. The end plug includes at least two coaxial cylinders having different diameters. The end plug is configured to seal a ceramic cladding tube. The manufacturing method includes hot pressing a powder mixture comprising β-SiC, AlO, AND YO.

Method of manufacturing a nuclear fuel element end plug which contains ß-SiC, Al2O3, and Y2O3

A method of ion-plasma application of corrosion-resistant film coatings on articles made from zirconium alloys includes placing articles in a planetary carousel mechanism, heating the articles, and ion-beam etching and surface activation of the articles using water-cooled unbalanced magnetrons. In addition, the surface of the articles is activated using an ion source which generates gas ions with an accelerating voltage of up to 5000 V and with feeding of a bias voltage to the articles. The coating is applied by using unbalanced and balanced magnetrons simultaneously with a residual induction of the magnetic field from 0.03 T to 0.1 T. The coating is applied to articles which are made from zirconium alloys and are placed vertically in a planetary carousel mechanism. The articles are heated in the coating application process to a temperature of 150-600° C., wherein the heaters are accommodated along the entire length of the articles. This produces corrosion-resistant film coatings of uniform thickness along the outer surface of articles made from zirconium alloys and raises productivity due to an increase in the discharge power density of magnetrons.

Method of ion-plasma application of corrosion-resistant film coatings on articles made from zirconium alloys

The method includes forming an inner monolithic layer from crystals of beta phase stoichiometric silicon carbide on a carbon substrate in the form of a rod by chemical methylsilane vapor deposition in a sealed tubular hot-wall CVD reactor. The method further includes forming a central composite layer over the inner monolithic layer by twisting continuous beta phase stoichiometric silicon carbide fibers into tows, transporting the tows to a braiding machine, and forming a reinforcing thread framework. A pyrocarbon interface coating is built up by chemical methane vapor deposition in a sealed tubular hot-wall CVD reactor. Then, a matrix is formed by chemical methylsilane vapor deposition in the reactor. A protective outer monolithic layer is formed from crystals of beta phase stoichiometric silicon carbide over the central composite layer by chemical methylsilane vapor deposition in a CVD reactor. And then the carbon substrate is removed from the fabricated semi-finished product.

Method for producing ceramic multilayered tube used as cladding for fuel element in nuclear power plant

The method for producing non-core beta silicon carbide fibers includes four steps. The first step is spinning of multifilament polymeric fiber by melt-extrusion of polycarbosilane. The second step is thermooxidative cross-linking for which the produced spun polymeric fibers are cured in an oxidation furnace at a temperature of 175-250 degrees C. at a heating rate of 3-10 degrees C./h until their weight is increased by 6-15%. The third step is carbonization of the produced cured polymeric fibers with the conversion into the ceramic phase. The fourth step is finishing of the produced beta silicon carbide fiber. The effect of the invention is producing non-core silicon carbide fibers, improving their strength performance, improving resistance to high temperatures and their high creep resistance, stable fiber properties, optimal average diameter of fibers, absence of foreign impurities in the fiber composition.

Method for producing non-core beta silicon carbide fibers

Growing community of inventors

Moscow, Russia

Vladislav Konstantinovich Orlov