Resonance self-shielding calculation method by aiming at light-water reactor on the basis of equivalent one-dimensional rod model

A light water reactor and self-screening technology, which is applied in the field of nuclear reactor core design and safety, can solve problems such as the large amount of calculation of ultra-fine groups and the inability to directly use full-reactor resonance self-screening calculation, etc., and achieve the effect of high computing efficiency.

Active Publication Date: 2017-08-11
XI AN JIAOTONG UNIV
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Problems solved by technology

However, the calculation amount of the ultrafine group is very large, and it cannot be directly used for the resonance self-screen calculation of the whole stack.
[0004] Therefore, none of the existing three methods

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  • Resonance self-shielding calculation method by aiming at light-water reactor on the basis of equivalent one-dimensional rod model
  • Resonance self-shielding calculation method by aiming at light-water reactor on the basis of equivalent one-dimensional rod model
  • Resonance self-shielding calculation method by aiming at light-water reactor on the basis of equivalent one-dimensional rod model

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Embodiment Construction

[0025] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0026] The present invention uses the neutron flow method to solve the Dankov correction factor, and according to the equivalence between the definition of the Dankov correction factor neutron flow and the definition of the collision probability, the moderator outer diameter of the equivalent one-dimensional rod is obtained through the binary search method, Finally, the subgroup method or ultrafine group method is used to solve the resonant self-screen calculation problem of the equivalent one-dimensional rod, and the effective self-screen section of the space correlation is obtained. The specific calculation process of this method includes the following aspects:

[0027] 1) The resonance self-shielding calculation problem is to solve the effective self-shielding cross section of the resonant nuclide in the fuel region with known material compos...

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Abstract

The invention discloses a resonance self-shielding calculation method by aiming at a light-water reactor on the basis of an equivalent one-dimensional rod model. The method comprises the following steps that: 1: for the resonance self-shielding calculation problem of the light-water reactor l, adopting a neutron current method to calculate each section of Dancoff correction factor of each fuel rod; 2: according to a function relationship between the Dancoff correction factor and a one-dimensional moderator external diameter, under a situation of a known Dancoff correction factor, adopting a binary search method to obtain the moderator external diameter; and 3: adopting a subgroup method or a superfine group method to calculate an equivalent one-dimensional fuel rod to obtain the effective self-shielding section of each circle of the fuel rod. Compared with a traditional resonance self-shielding calculation method, the resonance self-shielding calculation method disclosed by the invention is characterized in that the problem of complex geometry can be calculated, the method is higher in calculation efficiency, and the effective self-shielding section related to space can be obtained.

Description

technical field [0001] The invention relates to the technical field of nuclear reactor core design and safety, in particular to a resonance self-shielding calculation method based on an equivalent one-dimensional rod model for a light water reactor. Background technique [0002] Traditional light water reactor core fuel management calculation generally adopts a two-step method, that is, firstly, the minority group constant is obtained through component calculation, and then the core reactivity, critical boron concentration, etc., and power distribution data are obtained through core calculation. However, this method will introduce problems such as spatial homogenization errors and history effects, so the high-fidelity calculation of the whole core one-step method has been paid more attention in recent years. The one-step method means that without spatial homogenization, data such as reactivity, critical boron concentration, and power distribution are obtained directly throug...

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Application Information

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IPC IPC(8): G06F17/50G06Q50/26
CPCG06Q50/26G06F2111/08G06F30/13
Inventor 祖铁军贺清明曹良志刘宙宇
Owner XI AN JIAOTONG UNIV
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