Reactor core three-dimensional power rapid construction method based on monte carlo criticality calculation one-step method
A technology of three-dimensional power and construction method, applied in the field of reactor physics, can solve problems such as low calculation efficiency, achieve high calculation efficiency and improve the effect
Pending Publication Date: 2021-11-05
SHANGHAI JIAO TONG UNIV
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[0003] Aiming at the problem of low calculation efficiency caused by the inactive generation process of the existing Monte-Carbon criticality algorithm, the present invention proposes a fast construction method for three-dimensional power of the core based on the single-step method of the Monte-Carbon criticality calculation. By increasing the number of particles generation by generation, And real-time adjustment of the weight of each calculation generation to avoid the calculation of the inactive generation can significantly improve the efficiency of the Monte Carlo critical calculation, thereby quickly building a three-dimensional power distribution of the core, and effectively supporting the core physical design of the new reactor
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[0017] Such as figure 2 As shown, it is the application scenario of the Monte Carlo critical calculation single-step method without non-active generation involved in this embodiment, that is, the VERA reactor core, by dividing the core evenly into 15×15×10=2250 regions, and using this method to calculate the power distribution of these 2250 regions, see the power distribution of the core region image 3 .
[0018] This embodiment first uses the RMC program to carry out physical modeling of the model, and defines the geometry and material parameters of the model by the input card; selects the particle number increasing sequence for the calculation model, that is, input: m (1) , c and h, and according to m (1) , c and h determine the particle number sequence m (i) ; Determine the total algebra N to be calculated according to the total number of particles; conduct mathematical optimization analysis on the entire model to determine the best weighting coefficient.
[0019] Fro...
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According to a reactor core three-dimensional power rapid construction method based on the monte carlo criticality calculation one-step method, the monte carlo criticality calculation efficiency is remarkably improved by increasing the number of particles generation by generation, not calculating inactive generations any more, not considering the fission source convergence diagnosis problem and adjusting the weight of each calculation generation in real time; and all calculation generations are ensured to contribute to a calculation result. On the basis of the Monte Carlo critical one-step method without the inactive generation provided by the invention, the three-dimensional power distribution of the whole reactor can be quickly constructed, and the highest calculation efficiency is realized.
Description
technical field [0001] The invention relates to a technology in the field of reactor physics, in particular to a method of avoiding inactive generations by adjusting the particle number scale of the Monte Carlo critical calculation, thereby improving the efficiency of the Monte Cal critical calculation and realizing the rapid construction of the three-dimensional power of the core. Background technique [0002] The three-dimensional power distribution of the reactor core is the most critical physical quantity in the R&D and design of new reactors, which can be obtained through Monte Calvin critical calculation. Therefore, the critical calculation is the most basic requirement for the physical design of the reactor. The traditional Monte Carlo critical algorithm divides the calculation process into an inactive generation and an active generation, that is, first obtain a stable and convergent fission source distribution through the calculation of the inactive generation, and th...
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Login to View More IPC IPC(8): G06F30/25G06F30/27
CPCG06F30/25G06F30/27
Inventor 潘清泉张滕飞刘晓晶何辉
Owner SHANGHAI JIAO TONG UNIV