[en] Full text: The paper comprises the results of calculations for conversion of nuclear reactor VVR-CM (located in Uzbekistan) from HEU to LEU by means of tube and rod type fuel elements with U-Mo alloy nuclear fuel. (author)

[en] This paper presents the results of the works under the Russian RERTR Program for the past period and some plans for the future. In 1994, a branch program entitled 'Design of Fuel Elements and Fuel Assemblies with 20% Uranium-235 Enriched Fuel for Research Reactor Cores' was developed and initiated by the order of the Ministry of the Russian Federation for Atomic Energy. The major objectives of the Program are as follows: Prevention of nuclear weapons proliferation; retaining the market for FA supplies to the CIS and East European countries, etc.; enabling Russia's participation in competition projects for building research reactors in different countries of the world. In connection with the lack of financing, the 1994 Branch Program was not implemented in full within the schedule. Currently, Russian RERTR program has been developed and implemented, with the completion dates of 2004-2005. It has specified the works with regard for the revision of the concept of certain tasks and their accomplishment dates and also with introduction of new problem solution paths

[en] Rare-earth permanent Nd-Fe-B magnets are the most promising ones because they have the highest magnetic and operating characteristics. These magnets are produced from alloys having the respective chemical composition principally by the powder metallurgy technology. The paper presents the results of study of the manufacturing process of high-quality permanent magnets by the method of solid-phase alloying of magnetic alloys obtained by means of the out-of-furnace fluoride technique. In the present work, metallic foundry alloys and alloy hydrides of Nd-Fe, Dy-Fe and Tb-Fe systems are considered as alloying additions. (paper)

[en] Production of permanent magnets on basis of rare earth elements (REE) is implemented by means of powder metallurgy, therefore a technologically important operation is the multistage mechanical crushing of materials to the extent of domains. The promising technique of crushing of magnetic materials is their consistent hydrogenation-dehydrogenation that allows obtaining nano-dispersed powders which are stable enough in air. Hydrogenation apparatuses, as opposed to conventional grinding machines, do not comprise motion works and their producing capacity is much higher. Hydrogenation process does not require any additional preparation of materials and it excludes undermilling and overmilling as well as material oxidation. The paper presents the results of investigation on the temperature effect on the hydrogenation process of Nd-Fe alloys. The study results on the corrosion stability of ligature hydrides under various conditions are also given. Kinetic parameters of the hydrogenation process of ligatures are determined. The phase composition of corrosion products is detected. Guidelines on hydride powder storage are given. (paper)

[en] This paper presents results of the work under the Russian RERTR program for the past period and some plans for the future. (author)