Two-dimensional mobile heat conduction model and model establishment method and application method
A technology of two-dimensional movement and method establishment, which is applied in the field of nuclear power, can solve the problems of not considering key factors, low precision of two-dimensional movement fine heat conduction model, etc., and achieve the effect of accurate advance rate of quenching front
Active Publication Date: 2022-03-25
NUCLEAR POWER INSTITUTE OF CHINA
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Problems solved by technology
[0004] The technical problem to be solved by the present invention is: the fineness of the two-dimensional mobile fine heat conduction model in the system for simulating the reflooding process is low, and some key factors are not considered, such as: the influence of the change of oxide layer thickness on the entire heat conduction process
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[0039] Before any embodiment of the invention is described in detail, it is to be understood that the invention is not limited in application to the details of construction shown in the following description or in the accompanying drawings. The invention is capable of other embodiments and of being practiced or of being carried out in various ways. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative improvements belong to the protection scope of the present invention.
[0040] A two-dimensional mobile heat conduction model, said model including a mesh module and a calculation module;
[0041] The grid module includes a basic grid area, and also includes an oxide layer grid area dynamically generated during the resubmergence process;
[0042] The grid area of the oxide layer corresponds to the advancing position of the quenching front;
[0043] The calculation module is used to cal...
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The invention discloses a two-dimensional mobile heat conduction model, a model establishment method and an application method, relates to the technical field of nuclear power, and solves the problem that the fineness of the two-dimensional mobile fine heat conduction model in the system for simulating the reflooding process is low and some key factors are not considered . The present invention includes that the grid module includes a basic grid area, and also includes a dynamically generated oxide layer grid area during the resubmergence process; the oxide layer grid area corresponds to the advance position of the quenching front; the calculation module The calculation is used to load the change data of the axial oxide layer thickness of the quenching front on the fuel rod or / and the fuel plate into the grid area of the oxide layer during the reflooding process; the calculation module is also used to calculate the basic grid and the oxidation layer. The layer mesh exchanges heat data with the fluid on the walls of the fuel rods and / or fuel plates. The ARSAC program optimized by the application method of the present invention can more accurately simulate the peak temperature of the cladding and the advance rate of the quenching front during the reflooding process.
Description
technical field [0001] The invention relates to the technical field of nuclear power, in particular to a two-dimensional mobile heat conduction model, a model establishment method, and an application method. Background technique [0002] The reflooding process is the most complicated two-phase flow heat transfer process. In the reflooding process, the core will experience a very complicated two-phase flow heat transfer process from being exposed to being filled with water again. For simulating other transient and accident processes, generally only the radial heat conduction of fuel rods needs to be considered. However, for simulating the reflooding process, due to the large axial temperature difference of the fuel rod, especially the axial temperature difference near the quenching front, it is necessary to consider the axial heat transfer under the condition of considering the radial heat transfer. [0003] At present, international system programs capable of simulating the...
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IPC IPC(8): G06F30/23G06F119/08
CPCG06F30/23G06F2119/08
Inventor 吴丹丁书华邓坚冷贵君李庆邓纯锐刘余申亚欧李仲春陈伟黄涛马海福
Owner NUCLEAR POWER INSTITUTE OF CHINA