Reactor internal on lower part of reactor

A technology for reactors and internal components, which is applied in the directions of reactor fuel elements, reactors, moderators/core structures, etc., can solve the problems of high structural resistance coefficient and high risk, reduce the resistance loss along the way, improve the distribution effect, The effect of meeting the allowable value of ingress flow distribution deviation

Active Publication Date: 2013-10-30
上海核工程研究设计院股份有限公司
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

The flow distribution of this structure is relatively ideal, but because the flow distribution ring is directly welded on the pressure vessel, it cann

Method used

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  • Reactor internal on lower part of reactor
  • Reactor internal on lower part of reactor

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Embodiment Construction

[0022] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0023] The present invention includes a reactor pressure vessel 1 , a core and a flow distribution device 3 .

[0024] The core is placed inside the reactor pressure vessel 1 . The core supporting lower plate 2 is usually a large-diameter circular plate, and the fuel assembly positioning pins are placed on the plate to support the fuel assembly. A large number of through holes are machined on the lower plate 2 of the core support, usually four for one set of fuel assemblies. The coolant enters the core through these through holes and cools the core.

[0025] The flow distribution device 3 includes an upper distribution ring, a middle distribution ring and a lower distribution plate. The circumferential side wall of the upper distributing ring is provided with circular holes of continuous distribution with equal diameters, and the top circumfe...

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Abstract

Reactor internals in a lower reactor comprise a reactor pressure vessel(1), a reactor core provided in the reactor pressure vessel(1), a supporting lower plate(2) of the reactor core fixed to the bottom of the reactor core and a flow distribution device(3) provided with several circular openings. The flow distribution device(3) comprises an upper distribution plate, a middle distribution ring fixedly connected to the bottom of the upper distribution plate along the periphery direction, a lower distribution plate fixedly connected to the bottom of the middle distribution ring along the periphery direction. Several evaginable protruding sections are provided on the top of the upper distribution ring. The evaginable protruding sections of the upper distribution ring are fixedly connected to the supporting lower plate (2) of the reactor core. The reactor internals in a lower reactor have a simple structure, an even flow distribution and a small resistance coefficient, and are easy to replace and repair.

Description

technical field [0001] The invention relates to a lower reactor internal component, in particular to a reactor lower internal component with simple structure, uniform flow distribution, small resistance coefficient and easy replacement and maintenance. Background technique [0002] The pressurized water reactor contains a loop cycle, including a primary loop and a secondary loop. The primary loop completes the export of heat from the reactor, and conducts it to the secondary loop through the steam generator to drive the steam turbine to generate electricity. The primary loop is mainly composed of the reactor pressure vessel, reactor internals, fuel assemblies, steam generators, main pumps, and pipelines. [0003] The fuel assembly is placed in the pressure vessel, and the support function is realized by the internal components of the reactor. The nuclear fuel maintains a controllable chain fission reaction in the reactor to generate energy. The energy generated by nuclear f...

Claims

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Application Information

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IPC IPC(8): G21C19/04
CPCG21C5/10G21C15/02Y02E30/40G21C13/02Y02E30/30
Inventor 林绍萱梁叶佳张明刘彬丁宗华翁羽余凡陈宇清
Owner 上海核工程研究设计院股份有限公司
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