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Experimental method for measuring equivalent mixing coefficient of rod bundle channel

A technology of mixing coefficient and experimental method, which is applied in the fields of nuclear reactor monitoring, reactor, nuclear power generation, etc., can solve the problems of not giving the method for solving the mixing coefficient of the rod bundle channel, and unable to measure the temperature of the rod bundle sub-channel in real time. simple steps

Pending Publication Date: 2021-08-31
SUN YAT SEN UNIV
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Problems solved by technology

However, this invention cannot realize the real-time measurement of the temperature of the rod bundle sub-channel when collecting the relevant information of the rod bundle sub-channel
Moreover, the invention does not provide a method for solving the key parameter of the rod bundle channel mixing coefficient

Method used

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  • Experimental method for measuring equivalent mixing coefficient of rod bundle channel
  • Experimental method for measuring equivalent mixing coefficient of rod bundle channel
  • Experimental method for measuring equivalent mixing coefficient of rod bundle channel

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Embodiment Construction

[0044] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0045] In the description of the present invention, it should be understood that the terms "center", "upper", "lower", "vertical" are used in the present invention , "top", "bottom", "inner", "outer" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or It should not be construed as limiting the invention by implying that a referenced device or element must have a particular orientation, be constructed, and operate in a particular orientation.

[0046] It shou...

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Abstract

The invention relates to the technical field of thermal performance experiments, and discloses an experimental method for measuring an equivalent mixing coefficient of a rod bundle channel, which comprises the following steps of: building an experimental model; inserting a plurality of experiment rods into a cavity, the experiment rod dividing the cavity into a plurality of sub-channels which are communicated with one another; injecting water with the temperature of T1 into the cavity; injecting water with the temperature of T2 into the center of the cavity, T2 being greater than T1; measuring the temperatures in the sub-channels to obtain actual temperature values; taking n numbers in the range of 0-0.5 as virtual turbulence exchange coefficients; inputting the virtual turbulence exchange coefficients into a COBRA program, and calculating virtual temperature values corresponding to the virtual turbulence exchange coefficients by using the COBRA program; comparing the virtual temperature values with the actual temperature values, and defining the virtual temperature value closest to the actual temperature value as a determined temperature value; and determining a virtual turbulence exchange coefficient corresponding to the temperature value, namely the rod bundle channel mixing coefficient. According to the invention, the equivalent mixing coefficient of a rod bundle channel can be determined.

Description

technical field [0001] The invention relates to the technical field of thermal performance experiments, in particular to an experimental method for measuring the equivalent mixing coefficient of a rod bundle channel. Background technique [0002] The fuel assembly is a key component of a nuclear reactor, and the cross-mixing ability between the sub-channels of the fuel assembly is of great significance to the thermal design of the reactor. For the bundle assembly, the lateral mixing between subchannels is mainly caused by the natural diffusion of vortices in the bundle channels. This kind of lateral mixing is called turbulent mixing, and the turbulent mixing coefficient is used to quantitatively describe turbulent mixing. The main feature of turbulent mixing is that adjacent subchannels exchange energy and momentum through velocity fluctuations in the rod gap, and no net mass mixing occurs. [0003] The patent with the publication number CN110828013A discloses an isolating...

Claims

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Application Information

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IPC IPC(8): G21C17/10G21C17/112
CPCG21C17/10G21C17/112Y02E30/30
Inventor 明平剑曾月陈焕栋
Owner SUN YAT SEN UNIV
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