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Fission source extrapolation method for accelerated Monka criticality calculation

A push method and Monte Carlo technology, applied in the field of reactor engineering, can solve problems such as slow convergence of fission sources, and achieve the effects of improving critical calculation efficiency, good application effects, and accelerating the convergence of fission sources

Active Publication Date: 2022-08-05
SHANGHAI JIAOTONG UNIV
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Problems solved by technology

[0003] Aiming at the problem of slow convergence speed of the fission source in the existing Monte Carlo critical calculation, the present invention proposes a fission source extrapolation method to accelerate the Monte Carlo critical calculation, which can significantly improve the convergence speed of the fission source in the Monte Carlo calculation of the reactor, and can be used as a Monte Carlo method. The acceleration module of the program is adopted by various Monte Carlo programs, which significantly improves the efficiency of Monte Carlo critical calculations

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  • Fission source extrapolation method for accelerated Monka criticality calculation
  • Fission source extrapolation method for accelerated Monka criticality calculation
  • Fission source extrapolation method for accelerated Monka criticality calculation

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Embodiment Construction

[0019] like Figure 4 As shown, the fission source extrapolation method for accelerating the Monte Carlo calculation of the Monte Carlo criticality involved in this embodiment can significantly accelerate the convergence speed of the fission source during the Monte Carlo calculation of the reactor, thereby improving the criticality calculation efficiency.

[0020] Step 1: The neutron transport equation needs to be solved in the reactor criticality calculation: Among them: L, C, S and M are the leakage term, absorption term, scattering term and fission term, respectively, k eff is the effective multiplication factor, ψ is the neutron flux density, and its fission iteration satisfies: Among them: F is the iterative operator, which reflects the global response relationship process of the fission reaction, and a series of eigenvalues ​​of F are |k 0 |>|k 1 |>|k 2 |>....

[0021] Step 2: When performing the Monte Carlo critical calculation, first set the initial fission sour...

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Abstract

A fission source extrapolation method for accelerating the Monte Carlo criticality calculation. By setting an initial fission source for the Monte Carlo criticality calculation, neutron transport simulation can be performed according to the initial fission source, and the spatial distribution of the fission source can be counted; Then, based on the setting that the fission source will gradually converge to the real solution, the fission source is linearly extrapolated. Finally, the entire calculation model is divided into multiple fission regions, and the source extrapolation factor is used to adjust the number of fission neutrons in each region. The invention can remarkably improve the convergence speed of the fission source of the Mongolian card calculation of the reactor, and can be used as an acceleration module of the Mongolian card program, so that it can be used by a variety of Mongolian card programs, and the efficiency of the critical calculation of the Mongolian card is significantly improved.

Description

technical field [0001] The invention relates to a technology in the field of reactor engineering, in particular to a fission source extrapolation method for accelerating Monka criticality calculation, which effectively improves the efficiency of Monka criticality calculation. Background technique [0002] Monka critical calculation faces the problem of slow convergence of fission sources, which seriously wastes computing resources. In order to improve the efficiency of the Monka criticality calculation, it is necessary to study the fission source convergence acceleration method. Linear extrapolation is a common acceleration method in the field of mathematics, but it has not been applied to the Monkey Card method. SUMMARY OF THE INVENTION [0003] Aiming at the problem of slow convergence speed of the fission source in the existing Monkey Card criticality calculation, the present invention proposes a fission source extrapolation method for accelerating the Monkey Card crit...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20G06F111/08
Inventor 潘清泉孙启政张滕飞刘晓晶
Owner SHANGHAI JIAOTONG UNIV
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