Fuel assembly positioning grid optimization method and device
A positioning grid and fuel assembly technology, which is applied in the assembly of fuel elements, design optimization/simulation, greenhouse gas reduction, etc., can solve the problems that there is no way to form the positioning grid arrangement, and the safety performance and economic efficiency cannot be improved. Achieve the effect of improving safety performance and economy
Active Publication Date: 2021-06-04
SHANGHAI JIAOTONG UNIV
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Problems solved by technology
[0004] In view of this, the object of the present invention is to provide a fuel assembly spacer grid optimization method and device, to solve the problem that the optimization of the spacer grid in the prior art focuses on the optimization of the spacer grid geometry, that is, through different designs The structural size and spacer grids of different geometric shapes (including the size and arrangement of the spacer components such as springs, rigid protrusions, and mixing wings) have no clue on how to optimize the position and arrangement of the spacer grids in the axial direction of the fuel assembly. Formation method, the technical problem of not being able to improve safety performance and economy through optimized arrangement
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[0044] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. the embodiment. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0045] According to an embodiment of the present invention, a method embodiment of a fuel assembly positioning grid optimization method is provided. It should be noted that the steps shown in the flow chart of the accompanying drawings can be implemented in a computer system such as a set of computer-executable instructions and, although a logical order is shown in the flowcharts, in...
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The invention provides a positioning grid optimization method and device for a fuel assembly, and relates to the technical field of positioning grids for a fuel assembly, and adopts the method of acquiring initialization data, and the initialization data includes physical models and geometric watershed parameters of corresponding positioning grid units; Pre-set multiple sets of positioning grid models, the positioning grid model is composed of physical models of the positioning grid units according to different arrangements; for each positioning grid model, the positioning grid model is divided into multiple The resistance coefficient of each sub-channel of the positioning grid is calculated according to the initialization data; the optimal positioning grid model is selected from multiple groups of positioning grid models according to each resistance coefficient, and the positioning grid model is selected in the radial direction By dividing multiple sub-channels and calculating the resistance coefficient, the purpose of selecting the optimal positioning grid model from multiple groups of positioning grid models is achieved, thereby realizing the technical effect of improving safety performance and economy through optimized arrangement.
Description
technical field [0001] The invention relates to the technical field of positioning grids for fuel assemblies, in particular to an optimization method and device for positioning grids for fuel assemblies. Background technique [0002] Composed of a certain number of fuel rods, a certain number of fuel rods are arranged at certain intervals and fixed into a bundle, plus various structural components, called reactor fuel assemblies, generally used in nuclear reactors for 3-5 years Time, because it is in a strong neutron field, it needs to withstand the erosion of high temperature, high pressure, high flow rate coolant, and at the same time it needs to bear the chemical action of fission products and complex mechanical loads, so the working conditions are very harsh. [0003] The optimization of spacer grids in the prior art focuses on the optimization of the geometric structure of spacer grids, that is, by designing spacer grids with different structural sizes and different geo...
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IPC IPC(8): G21C3/34G06F30/20
CPCY02E30/30
Inventor 魏佳妮刘晓晶熊进标柴翔张滕飞
Owner SHANGHAI JIAOTONG UNIV