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Steam generator lower part horizontal supporting structure for improving seismic resistance

A technology of steam generator and horizontal support, which is applied in the direction of boiler support/positioning device, etc., can solve the problems of not having the same design scheme design, and achieve the effect of avoiding the adverse effects of eccentricity and improving the earthquake resistance

Inactive Publication Date: 2019-06-25
NUCLEAR POWER INSTITUTE OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Nuclear power equipment and its related design belong to the application-specific field. Through comparison with various schemes for the horizontal support of the lower part of the steam generator in the nuclear power field, there is no identical design scheme.

Method used

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  • Steam generator lower part horizontal supporting structure for improving seismic resistance
  • Steam generator lower part horizontal supporting structure for improving seismic resistance
  • Steam generator lower part horizontal supporting structure for improving seismic resistance

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Experimental program
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Embodiment

[0044] In the implementation example, the distance between the spherical hinges at both ends of the lower two sets of tie rod systems is 1700mm. The supporting stiffness of the lower two sets of tie rod systems is adjusted to be 25%-30% of the supporting stiffness of the upper tie rod system.

[0045] Using the above-mentioned lower horizontal support of the steam generator, the seismic analysis of the reactor coolant system was carried out, and the calculation results showed that the seismic loads of the support legs, dampers and upper tie rods of the steam generator decreased by 10%, 9% and 21% respectively, and the steam generator The force and moment loads of the inlet nozzle are reduced by 9% and 30%, respectively. Load comparison effect as attached Figure 6 - attached Figure 7 shown.

[0046] Therefore, adopting the above-mentioned lower horizontal support design can significantly reduce the relevant load of the steam generator and enhance the anti-seismic capabilit...

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Abstract

The invention belongs to the technical field of nuclear reactor system equipment, and particularly relates to a steam generator lower part horizontal supporting structure for improving the seismic resistance. The horizontal supporting structure aims to overcome the defects in the prior art, and has the effects that the seismic resistance of a steam generator and a main system is improved, and thesafety of the steam generator under an earthquake condition is ensured. The horizontal supporting structure two pull rod systems, each pull rod system comprises support lugs (2), a pull rod (3) and asupporting seat (4), wherein the pull rods (3) are arranged between the support lugs (2) and the supporting seats (4), the support lugs (2), the pull rods (3) and the supporting seats (4) are connected with one another through spherical hinges, and the support lugs (2) are fixed on the side surface of the part, between a lower end socket (6) and a pipe plate (5), of the steam generator.

Description

technical field [0001] The invention belongs to the technical field of nuclear reactor system equipment, and in particular relates to a horizontal support structure for the lower part of a steam generator that improves the anti-seismic capability. Background technique [0002] The steam generator is an important equipment of the reactor coolant system, and it is very important to ensure its safety under earthquake conditions. At present, the horizontal support of the lower part of the steam generator of the second-generation nuclear power plant in China generally adopts the stop block, as shown in the attached figure 1 shown. Six stop blocks are arranged around the lower head to restrict the horizontal movement of the steam generator. In order to meet the requirements of steam generator thermal expansion displacement and on-site installation and commissioning under cold and hot working conditions, a reserved gap is set between the steam generator and the stopper. The stea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F22B37/24
Inventor 沈平川熊夫睿蔡逢春冯志鹏吕稀齐欢欢黄茜张文正
Owner NUCLEAR POWER INSTITUTE OF CHINA
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