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Conveniently machined nuclear fuel assembly lower pipe seat filter plate and machining process of nuclear fuel assembly lower pipe seat filter plate

A technology of nuclear fuel assembly and processing technology, which is applied to the assembly of fuel elements, nuclear power generation, and reduction of greenhouse gases, etc., can solve the problems of difficult processing and manufacturing, high manufacturing cost, etc., and achieve low processing difficulty, sufficient structural strength, and good filtering effect Effect

Active Publication Date: 2012-10-24
NUCLEAR POWER INSTITUTE OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing filter plate has a number of square holes running through its thickness direction on the plane to filter and block foreign matter in the water, but its processing and manufacturing is difficult, and it must be realized by special processing methods such as electrochemical processing, and the manufacturing cost high

Method used

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  • Conveniently machined nuclear fuel assembly lower pipe seat filter plate and machining process of nuclear fuel assembly lower pipe seat filter plate
  • Conveniently machined nuclear fuel assembly lower pipe seat filter plate and machining process of nuclear fuel assembly lower pipe seat filter plate
  • Conveniently machined nuclear fuel assembly lower pipe seat filter plate and machining process of nuclear fuel assembly lower pipe seat filter plate

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Embodiment 1

[0045] Such as figure 1 , 2 As shown in and 3, the present invention is mainly composed of a filter plate body 5, which is a whole plate, and the whole plate is also provided with a connecting hole 4 and a fixing pin correspondingly according to the opening position of the lower tube seat of the fuel assembly Holes 7; the upper and lower surfaces of the whole plate are provided with several elongated grooves 8, and the shape of the elongated grooves 8 can be as follows Figure 5 Rectangular as shown, can also be as Figure 6 wavy as shown, or as Figure 7 zigzag as shown; Figure 4 As shown, the elongated grooves 8 respectively arranged on the upper and lower surfaces of the entire plate are in a space intersecting structure, thereby forming filter holes 1 .

[0046] In order to ensure the structural strength of the entire filter plate and the circulation area of ​​the cooling liquid, such as figure 1 As shown, the present invention divides the filter plate body 5 into se...

Embodiment 2

[0049] This embodiment differs from Embodiment 1 in that there are at least two filter plate bodies 5 Figure 8 The thin plates shown are stacked, and each thin plate is provided with a plurality of elongated holes 9, and the filter holes 1 are formed by at least two elongated holes 9 respectively arranged on different thin plates in a space cross structure, in order to To better form the filter hole 1, in this embodiment, two adjacent thin plates are rotated 90 degrees and then superimposed, and in order to prevent the direct bonding of the two thin plates to cause a decrease in the flow rate of the cooling liquid, it can be placed between the two thin plates A spacer is added to the connection hole 4 so that it does not fit directly.

[0050] The thin plate can be made of a material with better structural strength, and the elongated hole 9 formed by punching can preliminarily filter the foreign matter in the coolant, and play the effect of filtering for the first time. The ...

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Abstract

The invention discloses a conveniently machined nuclear fuel assembly lower pipe seat filter plate which is mainly composed of a filter plate body (5), filtering holes (1) and connecting holes (4), wherein the filtering holes (1) and connecting holes (4) penetrate through the filter plate body (5), the filtering holes (1) are formed by two elongated slots or at least two strip-shaped holes in a spatial cross structure. The invention also discloses a process for machining the nuclear fuel assembly lower pipe seat filter plate. According to the conveniently machined nuclear fuel assembly lower pipe seat filter plate, the good filtering effect can be achieved, the flow area share of a refrigerant is high, the structural strength is enough, and the filter plate is conveniently mounted and fixed; and moreover, the nuclear fuel assembly lower pipe seat filter plate is low in machining difficulty and low in machining cost.

Description

technical field [0001] The invention relates to the design field of a filter plate for a lower tube seat of a nuclear fuel assembly, in particular to a filter plate for a lower tube seat of a nuclear fuel assembly that is easy to process and a processing technology thereof. Background technique [0002] The nuclear fuel assembly is composed of a number of fuel rods, guide tubes, positioning grids and upper and lower tube seats. The basic function of the lower tube base is to serve as the lower structural part of the nuclear fuel assembly, provide support and interfaces for the nuclear fuel assembly, and at the same time provide a channel for the coolant to flow in and distribute the coolant flow; in order to prevent foreign matter from entering the grid cell of the nuclear fuel assembly, the lower tube A filter plate is installed above the connecting plate of the seat, through which foreign matter is filtered, and the effect of filtering and blocking foreign matter in the wa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21C3/32
CPCY02E30/40Y02E30/30
Inventor 蒲曾坪黄春兰茹俊张林肖忠焦拥军陈杰庞华
Owner NUCLEAR POWER INSTITUTE OF CHINA
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