Rod position measuring device based on differential pressure variation
A measuring device and rod position technology, which is applied in the fields of nuclear reactor monitoring, reactor, nuclear power generation, etc., to achieve the effects of reduced failure probability, good economy and reliable performance
Active Publication Date: 2012-07-25
TSINGHUA UNIV
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Problems solved by technology
[0008] The purpose of the present invention is to provide a new rod position measuring device that improves the problems of the above-mentioned rod position measuring device, especially solves the problem of the most commonly used inductive rod position measuring device
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[0044]Through proper principle selection and structural design, the present invention adopts common industrial transmitters as signal acquisition equipment, and the number of acquisition units is greatly reduced. It has the characteristics of mature manufacturing process, convenient installation, simple structure, convenient maintenance and high reliability. The present invention provides a rod position measuring device based on the principle of differential pressure variation, including:
[0045] A sampling pipe for differential pressure measurement, its inlet end and the outlet drainage pipe connected to the side wall of the outlet end communicate with the coolant fluid part in the reactor system respectively. And the fluid pressure of the part connected to the inlet port is higher than the fluid pressure of the part connected to the port of the outlet drainage tube;
[0046] The two pressure introduction pipes used for differential pressure measurement are respectively conn...
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The invention relates to a rod position measuring device based on differential pressure variation, belonging to the reactor rod position measurement and control technical field. The invention is characterized in that the rod position measuring device contains a differential pressure measurement sampling pipe, a field measuring unit, a measuring core rod and an information processing unit. The field measuring unit is composed of an upper joining pipe, a lower joining pipe, a pressure measuring element, a differential pressure measuring element, a temperature measuring element and a flow measuring element; the information processing unit calculates the length of runner at the measuring core rod between the center lines of the upper joining pipe and the lower joining pipe namely rod positionexpressed at the upper end face of the measuring core rod according to the pressure difference between the upper and lower joining pipes obtained by the measuring unit, density and viscosity of cooling agent, distance between the center lines of the openings of the upper and lower joining pipes, wherein the distance contains flow friction drag coefficients with and without the presence of measuring core rod, runner equivalent hydraulic diameter and the measured volume flow of the cooling agent. The invention has the advantages of easy manufacturing, small volume and effective reduction of mutual interference with other equipment.
Description
technical field [0001] The invention belongs to the technical field of reactor rod position measurement and control, and relates to a reactor rod position measurement device, in particular to a rod position measurement device based on the principle of differential pressure variation. Background technique [0002] Control rods and their driving mechanisms are important components to ensure the safe operation of the reactor. Under normal working conditions, by adjusting the position of the control rods, the normal start-up and shutdown of the reactor can be realized, and the reactor can be maintained at a given power level and the power can be adjusted; under accident conditions, by quickly inserting the control rods Reactor core to achieve emergency shutdown. The rod position measurement device is one of the most important devices in this component, and its reliability and safety are directly related to the normal operation and safety of the entire reactor. [0003] At pres...
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IPC IPC(8): G21C17/10
CPCY02E30/30
Inventor 李胜强姜胜耀薄涵亮王文然张亚军
Owner TSINGHUA UNIV