Applied Physics and Mathematics Annotation << Back ANALYSIS OF CHANGES IN ISOTOPIC AND ELEMENTAL COMPOSITION IN HIGH-TEMPERATURE NICKEL-HYDROGEN REACTORS A.G. PARKHOMOV, S.N. ZABAVIN, T.R. TIMERBULATOV, K.A. ALABIN, S.N. ANDREEV, A.G. SOBOLEV The results of the analysis of the isotopic and elemental composition of fuel and matter near the active zone of nickel-hydrogen reactors before and after work with operating excess energy up to 790 MJ are presented. No significant changes in the isotopic composition of nickel and lithium were observed. A significant increase in the concentration of impurities in a number of nuclides has been observed not only in fuel, but also in structural elements adjacent to the active zones of the reactors. Key words: hydrogen, nickel, heat release, isotope structure, radiation. Contacts: - Pp. 09-19.