Multi-physically coupled system and method for reactor simulation
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A coupled system, multi-physics technology, applied in the field of nuclear energy and simulation computing
Active Publication Date: 2018-12-21
CHINA INSTITUTE OF ATOMIC ENERGY +2
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[0007] As mentioned above, although there are many tools for multi-physics coupling in the prior art, involving multiple functions such as coupling process control, data transfer, and grid mapping...
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no. 1 example
[0049] This embodiment provides a multi-physics coupling system for nuclear reactor simulation, that is, a multi-physics coupling framework. figure 2 Shown is a schematic structural diagram of the multi-physics coupling system used for nuclear reactor simulation in this embodiment.
[0050] Such as figure 2 As shown, the system includes five hierarchical structures. The highest layer of user demand receiving layer is used to interact with users to obtain basic parameters including reactor type, rated power, fuel type, etc., as well as specific coupling requirements; the next layer of coupling requirements is predefined Layer, which is pre-defined for several commonly used couplings in reactor simulation, namely transport-burnup coupling, nuclear-thermal coupling, fluid-solid-thermal coupling, physics-thermal-fuel performance coupling, and material service performance physics- Thermal coupling; the coupling implementation layer implements two strategies of loose coupling and...
no. 2 example
[0054] This embodiment provides a multi-physics coupling method for nuclear reactor simulation, Figure 4 Shown is a schematic flow chart of the multi-physics coupling method for reactor simulation in this embodiment. Such as Figure 4 As shown, the multi-physics coupling method for nuclear reactor simulation in this embodiment specifically includes the following steps:
[0055] Step S1, select a coupling strategy. When the loose coupling strategy is selected, go to step S2; when the tight coupling strategy is selected, go to step S3.
[0056] Preferably, in this step, the coupling strategy is selected according to simulation requirements, computing resources, and the like.
[0057] Step S2, complete the calculation of the corresponding single physical module and the coupling between modules according to the simulation requirements, collect and output the simulation data.
[0058] The single-physics coupling model and simulation program in this step include: structural mec...
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Abstract
The invention provides a multi-physical coupling system for reactor simulation, which is designed according to the multi-physical coupling requirements of a nuclear reactor, comprises a bottom supporttool and integrates a plurality of coupling strategies. A system includes a top layer user demand receiving layer, a coupling requirements predefined layer, a coupling implementation layer, a supporttool layer, the five hierarchies of the runtime environment layer, which combines the scheduling of coupled computing flow and the update and transfer of interface parameters, grid mapping between different computing programs, the transfer of solution data between programs in different spatial discrete modes, coupling strategy, coupling process control, bottom support tools and high performance environment extension can be provided. It is very important for new reactor design, optimization of nuclear power plant in service, optimization of operation simulation under different conditions, anddemonstration and prediction of serious accident sequence.
Description
technical field [0001] The invention belongs to the field of nuclear energy and simulation calculation, and in particular relates to a multi-physics coupling system and method for reactor simulation. Background technique [0002] With the increase of human energy demand, nuclear energy has become an important energy source. Nuclear reactors consist of a complex series of interrelated phenomena. In a reactor, where nuclear fission reactions occur to generate nuclear energy, the coolant carries heat away from the core. This process involves the interaction of multiple complex phenomena. Fission produces nuclear heat, which leads to changes in the core temperature field, fluid coolant circulation cooling, and changes in temperature density. The change in coolant in turn leads to changes in the reaction cross section. Another On the one hand, thermal strain causes displacement on the mechanical model, which in turn affects the heat conduction model. [0003] With the improvem...
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