| 摘要 |
FIELD: heating.SUBSTANCE: invention can be used in the horizontal steam generators of nuclear power plant (NPP) with water-cooled power reactor (WCPR). The first circuit heating medium header with U-shape pipes of the horizontal heat exchange bunch is specified, it is made in form of welded thick wall vessel having the perforated middle cylindrical part, made with possibility of installation and securing in it of U-shape heat exchange pipes bunch, the pipes are arranged in packages and are separated in the bunch by vertical annular corridors, bottom cylindrical part made with possibility of welded connection with the branch pipe of the steam generator casing, and top cylindrical part with cone transition to the flanged connection of the hatch with lid. Outside diameter Dof the first circuit header in middle part is selected based on the set ratio of spacing between the heat exchange tubes, corridor width of heat exchange bunch, outside diameter of the heat exchange tubes, tubes number in the horizontal row, minimum radius of tubes bend in the heat exchange bunch. Wherein the holes for the heat exchange tubes securing are located on middle cylindrical part of the header using the staggered layout.EFFECT: assurance of strength of header wall jumpers between the holes for the heat exchange tubes securing and tightness of joint between the heat exchange tubes and header, wherein the outside surface of the perforated part of the header is used more effective for tubes insertion in it.14 cl, 8 dwg |
