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Method for accelerating nuclear reactor core channel computing

A nuclear reactor and sub-channel technology, which is applied in the field of nuclear reactor core design and safety, can solve the problems that a small number of hot channels cannot be calculated, and the calculation amount of computer memory is unbearable, so as to achieve the effect of saving memory

Active Publication Date: 2016-11-16
XI AN JIAOTONG UNIV
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Problems solved by technology

[0003] However, in the calculation of the sub-channel model, it is not possible to calculate only a few hot channels like the single-channel model, but to analyze a large number of fluxes. memory is unbearable

Method used

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  • Method for accelerating nuclear reactor core channel computing
  • Method for accelerating nuclear reactor core channel computing
  • Method for accelerating nuclear reactor core channel computing

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Embodiment Construction

[0070] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0071] for figure 1 and figure 2 The control volume in , the steady-state subchannel analysis solves the following differential form of the steady-state conservation equation:

[0072] (1) Mass conservation equation

[0073] The mass conservation equation of the control body (i, j) in the steady-state differential form is as follows:

[0074]

[0075] (2) Energy Conservation Equation

[0076] The energy conservation equation in steady-state differential form is as follows:

[0077]

[0078] (3) Axial momentum conservation equation

[0079] The axial momentum conservation equation in steady-state differential form is as follows:

[0080]

[0081] (4) Transverse momentum conservation equation

[0082] The transverse momentum conservation equation in steady-state differential form is as follows:

[0083]

[0084] The four conse...

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Abstract

The invention discloses a method for accelerating nuclear reactor core channel computing. The method includes: 1, performing linearization on a sub-channel mass, energy and momentum conservation nonlinear equation system; and 2, solving a linearized sub-channel equation through a Krylov subspace method, and storing an equation coefficient matrix through a compression line non-zero storage technique and restarting a GMRES algorithm to solve a linear equation system. The method can accelerate reactor core channel computing and decrease memory consumption at the same time; and the method can solve the large-scale non-symmetric linear equation system including an energy equation, an axial momentum equation, and a pressure correction equation through the Krylov subspace method, and has high computing efficiency.

Description

technical field [0001] The invention relates to the field of nuclear reactor core design and safety, and relates to an acceleration method for nuclear reactor core channel calculation. Background technique [0002] The traditional thermal-hydraulic analysis of the whole core of PWR generally adopts a single-channel model, which considers that each channel in the core is isolated and closed, and does not consider the exchange of mass, momentum and energy with adjacent channels. , this model is simple and has a small amount of calculation, but it is only suitable for calculating closed channels. Therefore, the sub-channel model was developed, which considers the exchange of mass, momentum and energy between adjacent channel coolants. Due to the consideration of this cross-mixing effect, the enthalpy and temperature of the coolant in the hot channel are lower than those without considering the cross-mixing, and the corresponding fuel temperature will also drop, which is benefi...

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Application Information

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IPC IPC(8): G06F19/00
CPCG16Z99/00
Inventor 曹良志陈军刘宙宇吴宏春
Owner XI AN JIAOTONG UNIV
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