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Statistical method of power density distribution for porous hexagonal prism nuclear fuel elements

A nuclear fuel element, distribution statistics technology, applied in nuclear engineering, nuclear power generation, nuclear reactor monitoring and other directions, can solve the problem of the difficulty of fine power density distribution statistics of fuel elements

Active Publication Date: 2021-08-10
XI AN JIAOTONG UNIV
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  • Abstract
  • Description
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Problems solved by technology

Nuclear thermal propulsion reactor fuel elements generally adopt a porous hexagonal prism design, and the fuel matrix part of the element presents an irregular shape, which is very different from the regular cylindrical fuel rods of traditional reactors, which gives the fine power density distribution statistics inside the fuel element bring some difficulties

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  • Statistical method of power density distribution for porous hexagonal prism nuclear fuel elements
  • Statistical method of power density distribution for porous hexagonal prism nuclear fuel elements
  • Statistical method of power density distribution for porous hexagonal prism nuclear fuel elements

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Embodiment Construction

[0062] The method of the present invention will be described in further detail below in conjunction with the specific embodiments of the accompanying drawings:

[0063] like Figure 4 As shown, the present invention is a fine power density distribution statistical method for porous hexagonal prism nuclear fuel elements, comprising the following steps:

[0064] Step 1, such as figure 1 As shown, the base of the hexagonal prism nuclear fuel element is divided into six symmetrical areas, and these symmetrical areas are distributed in a rotationally symmetrical manner around the axis of the hexagonal prism nuclear fuel element base. Select one of the symmetrical regions (this embodiment selects symmetrical region 1 as an example to illustrate), divide the rhombus grid in its cross section, and the adjacent two sides of the grid are respectively adjacent to the two symmetrical sides of the cross section of the symmetrical region (such as figure 2 The boundary line 1 and the boun...

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Abstract

The invention discloses a statistical method for power density distribution of porous hexagonal prism nuclear fuel elements. The steps are as follows: 1. Divide a diamond-shaped grid in a cross-section of a symmetrical region of the fuel element; 2. Select samples evenly in the diamond-shaped grid. 3. Calculate the absolute coordinates of sampling points in each grid according to each grid position; 4. Obtain the effective number of sampling points in each grid located in the fuel matrix according to the absolute coordinates of sampling points 5. Calculate the area of ​​each grid; 6. Calculate the volume of the power statistical unit corresponding to each grid; 7. Calculate the heat deposition value in each power statistical unit; 8. Calculate the power density of each power statistical unit , the calculation ends. The invention can obtain the fine power density distribution of the irregular-shaped fuel matrix of the porous hexagonal prism fuel element, and can provide reference for design optimization and safety analysis of nuclear thermal propulsion reactors.

Description

technical field [0001] The invention relates to the field of nuclear reactor design and safety analysis, in particular to a fine power density distribution statistical method for porous hexagonal prism nuclear fuel elements. Background technique [0002] As the scale of human space exploration continues to increase, the requirements for performance indicators such as flight time, flight load, and flight acceleration of spacecraft are getting higher and higher. Traditional chemical energy propulsion technology has a high degree of technical maturity, and its performance has gradually approached the technical limit. However, its small specific impulse and low energy density are becoming more and more difficult to meet the needs of future space activities. Chemical rockets support long-range space flight There must be a very large initial payload mass in low earth orbit, which will greatly increase the cost of ground launch, which will reach an unbearable level. Therefore, the...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G21C17/06G06F17/11
CPCG06F17/11G21C17/06Y02E30/30
Inventor 田文喜张俊张大林王成龙秋穗正苏光辉
Owner XI AN JIAOTONG UNIV