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Anti-vibration tube support plate arrangement for steam generators

A technology of steam generator and support plate, which is applied in the direction of steam generation, steam generation method, steam boiler components, etc., and can solve the problems of radioactive materials entering and so on

Active Publication Date: 2014-02-26
WESTINGHOUSE ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It is therefore important that the U-tube remains free of defects without a rupture occurring in the U-tube which would result in the ingress of radioactive material from the primary fluid into the secondary side; this is an undesirable outcome

Method used

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  • Anti-vibration tube support plate arrangement for steam generators
  • Anti-vibration tube support plate arrangement for steam generators
  • Anti-vibration tube support plate arrangement for steam generators

Examples

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Embodiment Construction

[0024] Referring now to the drawings, FIG. 1 shows a steam or steam generator 10 utilizing a plurality of U-shaped tubes forming a tube bundle 12 to provide heat transfer from a primary fluid to vaporize or boil a secondary fluid. required heated surface. The steam generator 10 includes a vessel having a vertically oriented tubular shell portion 14; a top envelope or dished head 16 enclosing an upper end; and a generally hemispherical channel head 18 enclosing a lower end. . The lower housing part 14 has a smaller diameter than the upper housing part 15 and a frusto-conical transition 20 connects the upper and lower parts. The tube sheet 22 is attached to the channel head 18 and has a plurality of holes 24 disposed therein to receive the ends of the U-shaped tubes 13 . A dividing plate 26 is arranged centrally in the channel head 18 in order to divide the channel head into two compartments 28 and 30 which serve as headers for the tube bundle 12 . Compartment 30 is a primary...

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PUM

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Abstract

A means of offsetting semi-circular tube support plates typically present in heat exchangers with cross flow baffles, such as axial flow economizers, utilizing the motive force of steam generator pressurization. The offset slightly flexes the tubes, thereby providing a preload which minimizes the potential for tube vibration and wear.

Description

technical field [0001] The present invention relates generally to tube support arrangements for steam generators, and more particularly to a tube support arrangement for shell and tube steam generators applying a preload on the tubes. Background technique [0002] A pressurized water type nuclear reactor steam generator generally includes: a casing oriented vertically; a plurality of U-shaped tubes arranged in the casing so as to form a tube bundle; support tubes at opposite ends of the bend; a divider plate cooperating with the tube sheet; and a channel header forming a primary fluid inlet header at one end of the tube bundle and A primary fluid outlet header is formed at the other end of the tube bundle. The primary fluid inlet nozzle is in fluid communication with the primary fluid inlet header, and the primary fluid outlet nozzle is in fluid communication with the primary fluid outlet header. The secondary side of the steam generator comprises a packing arranged betwee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F22B37/20F28F9/013G21C15/02
CPCG21D1/00F28F9/0131F22B37/206F22B1/025Y02E30/40F22B37/002F22B37/205F22B37/66Y02E30/00Y02E30/30F22B37/20F28F9/013G21C15/02
Inventor R·M·韦普弗P·J·普拉布
Owner WESTINGHOUSE ELECTRIC CORP
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