[en] This work contains the results of the research of cycles of the centrifuge enrichment process of Pb, Mo, Ni isotopes. In the paper the possible schemes for obtaining isotopes ²⁰⁶Pb and ²⁰⁸Pb, ⁹²Mo and ¹⁰⁰Mo, as well as ⁶²Ni with enrichment more than 95% are considered. (authors)

[en] This work contains the results of research on the process for the centrifuge enrichment of selenium Isotope ⁷⁴Se. The centrifuge cascade that was used to obtain the first selenium isotope Selenium (⁷⁴Se) in the world with an enrichment of more than 99% in gram quantities is described. The same cascade was used to obtain small quantities of all others isotopes of selenium. As a result of this work, nearly 2 kg of elemental ⁷⁴Se with an enrichment of 96-99.8% were obtained. (authors)

[en] This work contains the results of research on the elimination of the depositions containing uranium from the gas centrifuges operating with the rated frequency can be done using the mixture of halogenfluorids-bromine trifluoride and iodine heptafluoride. (authors)

[en] Short communication. 4 refs.; 2 tabs

[en] In the paper a possibility of using isotopic tailored chemical elements in functional materials of Accelerator Driven Systems (ADSs), structural materials of Fast Reactor (FR) cores and matrix materials of uranium free fuels is considered. Firstly, the usage of the lead isotope ²⁰⁶Pb as a law activation, ²¹⁰Po and ²⁰⁷Bi free, 'pure' coolant for ADSs and FRs is analyzed Results of calculations of an ADS target and a subcritical core with a neutron law moderating and absorbing coolant consisted from another lead isotope ²⁰⁸Pb are given. (The paper second subject is dedicated to the possible usage of nickel depleted of the nickel isotope ⁵⁸Ni in special austenitic steels, with the aim to reduce accumulation of helium and hydrogen in pin claddings prepared from these steels and thus to prevent the cladding swelling during their exploitation in FRs. The third isotopic tailored material, molybdenum enriched with ¹⁰⁰Mo, can be used as a law activation, without the induced ⁹⁹Tc radio nuclide, matrix material for the uranium free fuel consisted from plutonium and minor actinides. The economical acceptance of charges spent on stable isotopes production is also considered The acceptable price of the isotopic product, for example ²⁰⁸Pb for ADSs, is estimated as $2-3 mln/ton It seems that such a price can be reached on introducing in the industry a new photochemical technique of lead isotope separation. Nevertheless, the well developed centrifugal separation technique can also produce ²⁰⁸Pb with the price approaching to this acceptable cost. Estimations show that it is, possible to obtain i kg of ²⁰⁸Pb from 4 kg of processing volatile substance, Pb(CH₃)₄ due to the great contents of ²⁰⁸Pb in natural lead (52%) and its extreme position in the lead stable isotope row. Similar situation exists for nickel isotopes, the extreme isotope ⁵⁸Ni is contained in natural nickel with the contents equal to 68% and its depleting can be reached at gaseous centrifuges in one step. The centrifuge separation product remaining, mixture of nickel isotopes ⁶⁰Ni, ⁶¹Ni, ⁶²Ni and ⁶⁴Ni, can be used for preparing the radiation resistant austenitic steel which can be long time successfully exploited in the BN-600 type FRs. ¹⁰⁰Mo is the heaviest stable isotope of molybdenum and its large quantities can be successfully produced at gaseous centrifuges as it was previously shown,for needs of experiments on neutrino mass measurement. (authors)

[en] This work contains the results of the research of complete cycles of the centrifuge enrichment process of all mercury isotopes. As a result of this work, gram quantities of enriched isotopes of mercury by the centrifuge enrichment processes were obtained for the first time in the world.

[en] This work contains the results of the research on centrifugal enrichment of all stable nickel isotopes. Non-steady-state separation methods were used for the effective extraction of isotopes ⁶²Ni and ⁶⁴Ni. The results of the experimental batches of the enriched isotopes of nickel are presented in the article. The technique of synthesis of tetrafluorophosphine-Ni(PF₃)₄ is considered. The results of the research of the process of thermo decomposition of Ni(PF₃)₄ in metal form are presented. As a result of this work, for the first time in the world, we obtained (by centrifuge enrichment process) tens of grams quantities of all isotopes of nickel at high enrichment. (author)

[en] In this article, possible ways for production of ¹⁷³Lu and other radioactive nuclides for their use as radiation sources for crack detectors in gamma defectoscopes are considered. Comparative characteristics of sources based on ⁷⁵Se and ¹⁷³Lu are given. Isotope ¹⁷³Lu can be produced by two ways: either by a primary beam of medium energy protons or by fast neutron irradiation with proton-driven neutron target according to the reaction ¹⁷⁵Lu(n, 3n)¹⁷³Lu. Estimation of isotope container activation under production of ¹⁷³Lu has been made.

[en] This work contains the results of the research for the complete cycle of the centrifuge enrichment process of all sulfur isotopes. As a result of this work there was obtained, and made available (by centrifuge enrichment process), for the first time hundreds of grams of all the isotopes of sulfur to high enrichment. (author)