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Rod position measuring method and device based on motion characteristics of control rod of nuclear power station and medium

A technology of motion characteristics and measurement methods, which is applied in the field of nuclear power plants, can solve problems such as upper limit of measurement accuracy, achieve the effects of improving reliability, significant economic benefits, and improving position measurement accuracy

Inactive Publication Date: 2021-02-12
NUCLEAR POWER INSTITUTE OF CHINA
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Problems solved by technology

[0004] But this kind of control rod measurement device has a disadvantage: its measurement accuracy has an upper limit, and the highest accuracy is the discrete distribution distance of the induction coil of the rod position detector

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  • Rod position measuring method and device based on motion characteristics of control rod of nuclear power station and medium
  • Rod position measuring method and device based on motion characteristics of control rod of nuclear power station and medium
  • Rod position measuring method and device based on motion characteristics of control rod of nuclear power station and medium

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Embodiment Construction

[0033] Before any embodiment of the invention is described in detail, it is to be understood that the invention is not limited in application to the details of construction shown in the following description or in the accompanying drawings. The invention is capable of other embodiments and of being practiced or of being carried out in various ways. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative improvements belong to the protection scope of the present invention.

[0034] Rod position measurement method based on the kinematic characteristics of nuclear power plant control rods, such as Figure 1-5 , 7, including the following steps:

[0035] Step 1, the excitation power supplies power to the rod position detector;

[0036] Step 2, collecting measurement signals from the rod position detector, including collecting the induced voltage signal of the coil in the rod position detect...

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Abstract

The invention discloses a rod position measuring method and device based on nuclear power station control rod motion characteristics and a medium, relates to the field of nuclear power stations, and solves the problem that an existing control rod measuring device has an upper limit in measuring precision. An excitation power supply supplies power to a rod position detector; acquiring a measurementsignal from the rod position detector, including acquiring an induced voltage signal of a coil in the rod position detector; separating a fixed frequency signal and a low frequency disturbance signalin the measurement signal, and performing data processing by combining the fixed frequency signal and the low frequency disturbance signal to obtain the position information of the rod position detector and the position information of the control rod bundle. On the basis of not changing the existing structure of the rod position detector, the precision of nuclear power station control rod position measurement can be provided. The effect of the method can be achieved only by changing a signal processing method and increasing low-frequency interference signal processing caused by control rod movement.

Description

technical field [0001] The invention relates to the field of nuclear power plants, in particular to a rod position measurement method, device and medium based on the motion characteristics of nuclear power plant control rods. Background technique [0002] Nuclear power plants perform power control by changing the axial position of the control rods in the reactor core. During reactor power operation, the accuracy of the rod position of the control rods is very important. If the control rods operate outside the limits without being detected, the power peak factor, rod value and shutdown depth limits may be violated in the case of a design basis accident. [0003] The control rod bundle of the pressurized water reactor nuclear power plant is inside the pressure vessel of high temperature and high pressure, so it cannot be directly measured. The most widely used measurement method is to use the principle of electromagnetic induction to obtain the induced voltage of discrete de...

Claims

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Application Information

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IPC IPC(8): G21C17/10
CPCG21C17/10Y02E30/30
Inventor 李梦书李国勇黄可东郑杲许明周何正熙青先国刘艳阳臧峰刚陈帅君王春蕾何佳佶陈美远刘依依
Owner NUCLEAR POWER INSTITUTE OF CHINA
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