Abstract: This invention relates to electric power industry, and can be used in horizontal steam generators for nuclear power plants (NPP) with a water-water energetic reactor (VVER). We claim a steam generator primary circuit coolant header with U-shaped tubes of a horizontal heat-exchange bundle designed as a thick-wall welded vessel with a perforated central cylindrical part designed so as to allow installation and fastening of a U-shaped heat-exchange tube bundle in the same, wherein the tubes are grouped into banks and separated by vertical inter-tubular tunnels, a lower cylindrical part designed so as to allow welded connection with the steam generator vessel connection pipe, and an upper cylindrical part with a conical adapter to the flange connection of the manhole with a lid, wherein primary circuit header outer diameter Dhead in the central part is selected based on formula.

Abstract: This invention relates to steam generators, and more particularly to horizontal steam generators for nuclear power plants with a water-water energetic reactor (VVER). We claim a horizontal nuclear power plant steam generator comprising a cylindrical vessel, two elliptical bottoms, at least one feed water supply and steam removal connection pipe, an inlet header and an outlet header, a heat-exchange tube bundle connected to the same, wherein number Ntb of heat-exchange tubes in the bundle is selected depending on outer diameter dtb of the heat exchange tubes according to formulae. The technical result of the invention is an increased heat transfer efficiency in the steam generator with a limited number and maximum length of heat exchange tubes, which allows to use tubes employed in the industry.

Abstract: The invention relates to steam generators for VVER nuclear power plants. We claim a steam generator with a horizontal heat-exchange tube bundle comprising a welded cylinder vessel manufactured of steel shells and equipped with at least one feed water supply connection pipe and one steam removal connection pipe, and two elliptical bottoms, vessel internals, inlet and outlet headers connected to the heat-exchange tube bundle forming a heat-exchange surface of the steam generator, wherein inner diameter dvess of the steam generator vessel is selected based on a formula. The steam generator vessel is filled with heat-exchange bundle tubes from the bottom upwards to the height of three quarters of its inner diameter or less, the remaining space in the top part of steam generator vessel is left for steam drying. The technical result is creation of a steam generator with a decreased specific amount of metal per structure wherein the generated steam is dried in one with the heat-exchange surface.

Abstract: This invention relates to electric power industry, and more particularly to horizontal steam generators for nuclear power plants with a water-cooled water-moderated power reactor (VVER) and to reactor plants with a VVER reactor and a horizontal steam generator. A reactor plant with a VVER reactor and a horizontal seam generator, including a nuclear reactor with four circulation loops, each comprising a steam generator with a horizontal bundle of heat-exchange tubes divided into banks by means of inter-tubular tunnels and connected to primary circuit coolant headers inside a cylindrical pressure vessel with elliptical bottoms, a reactor coolant pump, and a primary circuit coolant main circulation pipeline.

Abstract: This invention relates to electric power industry, and can be used in horizontal steam generators for nuclear power plants (NPP) with a water-water energetic reactor (VVER). We claim a steam generator primary circuit coolant header with U-shaped tubes of a horizontal heat-exchange bundle designed as a thick-wall welded vessel with a perforated central cylindrical part designed so as to allow installation and fastening of a U-shaped heat-exchange tube bundle in the same, wherein the tubes are grouped into banks and separated by vertical inter-tubular tunnels, a lower cylindrical part designed so as to allow welded connection with the steam generator vessel connection pipe, and an upper cylindrical part with a conical adapter to the flange connection of the manhole with a lid, wherein primary circuit header outer diameter Dhead in the central part is selected based on formula.