Numerical simulation method for oxygen concentration diffusion in oxygen control process of lead-cooled fast reactor

A technology of oxygen concentration and lead cooling, applied in CAD numerical modeling, design optimization/simulation, etc., to achieve the effect of saving computing resources and simplifying the physical phenomenon of oxygen control

Active Publication Date: 2020-11-03
XI AN JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Since the lead-cooled fast reactor is a new type of reactor, research on it in various countries is still in the exploratory

Method used

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  • Numerical simulation method for oxygen concentration diffusion in oxygen control process of lead-cooled fast reactor
  • Numerical simulation method for oxygen concentration diffusion in oxygen control process of lead-cooled fast reactor
  • Numerical simulation method for oxygen concentration diffusion in oxygen control process of lead-cooled fast reactor

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Example Embodiment

[0039] Implementation case 1:

[0040] A numerical simulation method for oxygen concentration diffusion in the oxygen control process of a lead-cooled fast reactor is used to control oxygen in the hydrogen + water gas phase. The steps are as follows:

[0041] Step 1: Model the oxygen control device. The calculation model of the oxygen control device only includes the liquid part. The height of the liquid part is 1 / 3 of the total height. The gas part is simplified to the boundary condition of a given oxygen concentration, and the gas-liquid two-phase interface is considered to remain unchanged. Modeling as a fixed wall;

[0042] Step 2: Mesh generation. Such as figure 2 As shown in the figure, 301 is the lead-bismuth alloy inlet, 303 is the lead-bismuth alloy outlet, and 302 is the vapor-liquid interface. The grid is locally densified near the vapor-liquid interface 303.

[0043] Step 3: Physical property call and oxygen control device calculation model setting: Since oxygen has a v...

Example Embodiment

[0075] Implementation case 2:

[0076] A numerical simulation method of oxygen concentration diffusion in the oxygen control process of a lead-cooled fast reactor is used for solid-phase oxygen control. The steps are as follows:

[0077] Step 1: Model the oxygen control device. The calculation model of the oxygen control device only includes the liquid part, simplifying the gas and solid parts to the boundary conditions of the given oxygen concentration; this example is solid-phase controlled oxygen, so the discrete element method is first used to simulate the random accumulation of lead oxide particles, and the accumulation result is used Perform fluid mechanics modeling. Lead oxide particles are not included in the modeling, and only the lead-based coolant flow channel is modeled. Such as image 3 As shown, the left side is the lead-bismuth alloy inlet section, and the right side is the lead-bismuth alloy outlet section. The black shaded sphere represents the surface of the lead...

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Abstract

The invention discloses a numerical simulation method for oxygen concentration diffusion in an oxygen control process of a lead-cooled fast reactor, and the method can be used for numerical simulationresearch on oxygen concentration diffusion and distribution characteristics in a mass exchanger in gas-phase oxygen control and solid-phase oxygen control processes of the lead-cooled fast reactor. By researching the common characteristics of gas-phase oxygen control and solid-phase oxygen control, the multiphase flow physical phenomenon in the oxygen control process is simplified into single-phase simulation, and numerical simulation of gas-phase oxygen control and solid-phase oxygen control can be completed at the same time on the basis of one set of method. The method provided by the invention has the characteristics of low resource occupation and high result reliability, can be used for lead-cooled fast reactor oxygen control experiment pre-analysis, and is helpful for saving experiment resources and obtaining a better experiment effect.

Description

technical field [0001] The invention relates to the technical field of computational fluid dynamics simulation of lead-cooled fast reactors, in particular to a numerical simulation method for oxygen concentration diffusion during the oxygen control process of lead-cooled fast reactors. Background technique [0002] Lead-cooled fast reactor refers to a type of reactor that uses liquid metal lead or lead-secret alloy (collectively referred to as lead-based coolant) as a coolant. It belongs to the fourth-generation reactor and has excellent neutron economy and safety. Modularity has broad prospects for development. The corrosion effect of lead-based coolants on structural materials is a key problem restricting the development of lead-cooled fast reactors. At present, the most feasible solution to the corrosion problem is achieved by controlling the oxygen concentration in lead-based coolants. By controlling the oxygen concentration in the coolant within a certain range, a prot...

Claims

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Application Information

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IPC IPC(8): G06F30/28G06F111/10
CPCG06F30/28G06F2111/10
Inventor 王成龙张衍张大林苏光辉秋穗正田文喜
Owner XI AN JIAOTONG UNIV
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