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Reactor internals of pressurized water nuclear reactor

A technology of nuclear reactors and internal components, applied in the field of nuclear power, can solve the problems of large diameter of water level detectors, achieve the effect of improving the overall performance and simplifying the structure

Active Publication Date: 2014-07-02
NUCLEAR POWER INSTITUTE OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, due to the large diameter of the water level detector, it is difficult to bend in the stack, so it is necessary to set up a guide structure for the in-line water level detector

Method used

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  • Reactor internals of pressurized water nuclear reactor
  • Reactor internals of pressurized water nuclear reactor
  • Reactor internals of pressurized water nuclear reactor

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Embodiment Construction

[0021] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0022] Such as figure 1 In the structure of the upper internals 21 shown, the upper support column 6 and the support column 12 of the guide structure 5 of the in-line water level detector are installed on the upper core plate 4, and the upper support column 6 and the support column 12 are supported and installed The upper support plate 2, the upper support plate 2 and the upper core plate 4 are all processed with guide holes, the control rod guide cylinder 3 is installed at the position of the guide hole between the upper support plate 2 and the upper core plate 4, and passes through Out of the upper support plate 2, the measurement guide structure 1 is also installed vertically on the upper support plate 5.

[0023] Such as figure 2 , image 3 and Figure 6 As shown, the lower internal component 22 includes a hanging basket assembly 7 a...

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Abstract

The invention relates to the technical field of nuclear power and discloses reactor internals of a pressurized water nuclear reactor. The reactor internals comprise upper reactor internals and lower reactor internals. The upper reactor internals comprise a measuring guiding structure, a guiding structure of a direct inset-type water level detector, an upper reactor core plate and an upper support plate. The lower reactor internals comprise a hanging basket assembly and a secondary support and flow distribution assembly. Through the novel low-chamber flow distribution structure, the measuring guiding structure in an upper head of the pressure vessel and the guiding structure of the direct inset-type water level detector for water level measurement, a reactor core cooling agent can be uniformly distributed to the reactor internals of the pressure vessel so that reactor whole performances are improved and a reactor structure is simplified. Through the guiding structure of the direct inset-type water level detector, the problems of large water level detector diameter and difficulty of bending in the reactor are solved.

Description

technical field [0001] The invention belongs to the technical field of nuclear power, and in particular relates to reactor internal components. Background technique [0002] The ACP1000 pressurized water nuclear reactor uses 177 sets of fuel assemblies to form the core, while the general existing pressurized water nuclear reactor uses 157 sets of fuel assemblies as the core, or uses more than 200 sets of fuel assemblies as the core. [0003] In the second-generation and second-generation improved pressurized water nuclear reactors currently in operation, the core neutron flux measurement detectors are drawn from the lower head of the pressure vessel, so components such as instrument casings and penetrations are installed at the lower head. Instrument bushings, penetrations, grid plates, secondary support columns and other structures can stir the coolant flow field in the lower chamber to suppress the formation of vortices, and at the same time distribute the flow into the co...

Claims

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Application Information

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IPC IPC(8): G21C13/02G21C19/04G21C17/10
CPCY02E30/40Y02E30/30
Inventor 李燕夏欣曹锐赵伟钟元章何大明余志伟胡朝威李娜张翼饶琦琦蒋兴钧何培峰舒翔
Owner NUCLEAR POWER INSTITUTE OF CHINA
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