[en] Basic patent technological solutions of butted units of nuclear energy technological plant for hydrogen and hydrogen-containing gases production by the method of methane vapour conversion using heat of high temperature helium-cooled reactors (HTGR) are considered. Various constructions of methane converters are suggested: converter with dense pipe packing, converter with cylindrical insertions, converter with direct-flow pipes, pipe converter with a water acket, converter with helium vessel air-cooling, non vessel variant of a pipe converter. The unitized and integral variants of arrangement of power technological plant equipment are discussed. It is shown that the development of the construction of helium cooled methane converter presents a complicated problem. Main difficulty consists in finding an optimal solution satisfying two contradictory requirements. On the one hand, a relatively small temperature gradient between the coolant and technological gas requires intensification of the heat of heat transfer process of helium side. From the other hand assuring of intensive heat exchange is limited by parameters of gas blower on differential pressure. Most prospective construction presents the one of conversion pipe of Feeld type

[en] The results of design treatment of process heat exchangers and layout solutions of an intermediate helium circuit of a high-temperature reactor are presented. The circuit is designed for producing a hydrogen-containing gas inthe process of methane steam conversion. High-temperature heat (900 deg C) is fed from the HTR reactor via a helium-helium heat exchanger. The versions of horizontal and vertical arrangement of the heat conversion facility, reactor of methane conversion with a catalyst if reaction pipes or in interpipe space, as well as a set of heat-exchange devices are considered