STEAM GENERATOR COOLANT HEADER WITH U-SHAPED TUBES OF A HORIZONTAL HEAT-EXCHANGE BUNDLE AND METHODS OF ITS MANUFACTURE

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 (1) with U-shaped tubes of a horizontal heat-exchange bundle designe...

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Bibliographische Detailangaben
Hauptverfasser:	LAKHOV, DMITRIY ALEKSANDROVICH, KONYUSHKOV, ALEKSANDR GRIGOREVICH, SAFRONOV, ALEKSEY VLADIMIROVICH, ALEKSEEV, DMITRIY EVGENEVICH, GERONTIEV, ALEKSANDR EVGENEVICH
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING COMBINED OPERATIONS DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OFGENERAL APPLICATION HEAT EXCHANGE IN GENERAL HEATING LIGHTING MACHINE TOOLS MECHANICAL ENGINEERING METAL-WORKING NOT OTHERWISE PROVIDED FOR METHODS OF STEAM GENERATION NUCLEAR ENGINEERING NUCLEAR PHYSICS NUCLEAR POWER PLANT OTHER WORKING OF METAL PERFORMING OPERATIONS PHYSICS STEAM BOILERS STEAM GENERATION TRANSPORTING UNIVERSAL MACHINE TOOLS WEAPONS
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Beschreibung
Zusammenfassung:	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 (1) with U-shaped tubes of a horizontal heat-exchange bundle designed as a thick-wall welded vessel with a perforated central cylindrical part (2) 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 (11, 12) and separated by vertical intertubular tunnels (13), a lower cylindrical part (5) 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 (10), wherein primary circuit header outer diameter Dhead in the central part is selected based on the following ratio: where: Sh is the spacing between heat-exchange tubes in the horizontal heat-exchange bundle row, mm, ?2 is the width of the heat-exchange bundle tunnel opposite to the coolant header, mm, d is the outer heat-exchange tube (4) diameter, mm, n1 and n2 indicate the number of tubes in the horizontal row of the smaller and bigger heat-exchange tube banks (11, 12), accordingly, mm, R? is the minimum bend radius of the heat-exchange bundle tubes, mm. The holes for fastening of heat-exchange tubes (4) are staggered in the central cylinder part (2) of the header so that the distance between edges of the adjacent holes is not less than 5.5 mm along the inner surface of the header. The technical result of the invention involves assurance of strength of the header wall bridges between holes for fastening of heat-exchange tubes and leaktightness of heat-exchange tube connections with the header assuming that the outer surface of the perforated header part is more efficiently (fully) used for tubing. FIGURE 1