A Numerical Simulation Method of Oxygen Concentration Diffusion in the 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: 2021-10-19
XI AN JIAOTONG UNIV
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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 stage
No research on the numerical simulation method of oxygen concentration diffusion in lead-based coolants has been reported so far

Method used

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  • A Numerical Simulation Method of Oxygen Concentration Diffusion in the Oxygen Control Process of Lead Cooled Fast Reactor
  • A Numerical Simulation Method of Oxygen Concentration Diffusion in the Oxygen Control Process of Lead Cooled Fast Reactor
  • A Numerical Simulation Method of Oxygen Concentration Diffusion in the Oxygen Control Process of Lead Cooled Fast Reactor

Examples

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Embodiment example 1

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

[0041] Step 1: Modeling of the oxygen control device. The calculation model of the oxygen control device only includes the liquid part, and 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. It is considered that the gas-liquid two-phase interface remains unchanged, and the gas-liquid two-phase interface Modeled as a fixed wall;

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

[0043] Step 3: Physical property call and calculation model setting of the ox...

Embodiment example 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: Modeling of the oxygen control device. The calculation model of the oxygen control device only includes the liquid part, and the gas and solid parts are simplified as the boundary conditions of a given oxygen concentration; this example is a solid-phase oxygen control, so the discrete element method is first used to simulate the random accumulation of lead oxide particles, and the accumulation results are used Carry out hydrodynamic modeling, lead oxide particles are not included in the modeling, and only the flow channel of the lead-based coolant is modeled. like image 3 As shown, the left side is the inlet section of the lead-bismuth alloy, the right side is the outlet section of the lead-bismuth alloy, and the black shaded sphere indicates the surface of the lea...

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Abstract

The invention discloses a numerical simulation method of oxygen concentration diffusion in the oxygen control process of a lead-cooled fast reactor, which can be used for numerical simulation research on the diffusion and distribution characteristics of oxygen concentration in a mass exchanger during the gas-phase oxygen control and solid-phase oxygen control processes of a lead-cooled fast reactor . By studying the common characteristics of gas-phase oxygen control and solid-phase oxygen control, the physical phenomenon of multi-phase flow in the process of oxygen control is simplified to single-phase simulation, and the numerical simulation of gas-phase and solid-phase oxygen control can be completed simultaneously based on a set of methods. The invention has the characteristics of low resource occupation and high reliability of results, can be used for pre-analysis of lead-cooled fast reactor oxygen control experiments, helps to save experimental resources and obtain better experimental results.

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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Patent Type & Authority Patents(China)
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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