System and method for measuring temperature of coolant in main pipeline of reactor of nuclear power station
A nuclear power plant reactor and coolant temperature technology, applied in the field of nuclear power plant monitoring, can solve problems such as inaccurate measurement results and affecting measurement accuracy, so as to save pipe material, reduce potential leakage sources, improve measurement accuracy and measurement response time Effect
Active Publication Date: 2017-06-09
中广核工程有限公司 +1
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Problems solved by technology
Therefore, in order to solve this defect, the prior art proposes to directly install the thermometer originally installed on the bypass pipeline on the main pipeline by designing a corresponding interface. However, due to the thermal stratification of the fluid in the hot pipeline, the temperature gauge can only Measuring the temperature at the current location leads to inaccurate measurement results. For this part of the thermometer, especially the narrow-range thermometer on the hot pipe, its installation position will affect the final measurement accuracy, but there is no suitable method in the prior art to determine the location of these thermometers
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[0034] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described in detail with reference to the accompanying drawings.
[0035] refer to figure 2 , is a structural schematic diagram of the nuclear power plant reactor main pipe coolant temperature measurement system of the present invention.
[0036] The nuclear power plant reactor main pipeline coolant temperature measurement system is used to measure the coolant temperature in the main pipeline, which includes:
[0037] The heat pipe 100 is connected to the steam generator 500 and the reactor pressure vessel 400, and is used to guide the coolant in the reactor pressure vessel 400 to the steam generator 500;
[0038] The cold pipe 200 connects the steam generator 500 and the reactor pressure vessel 400 , and is used to guide the coolant in the steam generator 500 to the reactor pressure...
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The invention relates to a system and method for measuring the temperature of a coolant in a main pipeline of a reactor of a nuclear power station. The main pipeline comprises a cold pipeline and a hot pipeline. The system comprises two wide-range temperature gauges and two narrow-range temperature gauges, wherein one wide-range temperature gauge and one narrow-range temperature gauge are arranged on the hot pipeline, one wide-range temperature gauge and one narrow-range temperature gauge are arranged on the cold pipeline, and the axial distance from the pipeline section, on which the narrow-range temperature gauge is located, on the hot pipeline to a pressure container is determined based on fluid mechanical emulation modeling analysis; and sampling interfaces for mounting temperature gauges are fixedly connected to the pipe wall of the main pipeline, a positioning hole penetrating through the pipe wall is formed in the region connected to the sampling interface on the main pipeline, and each temperature gauge is inserted into the corresponding sampling interface through a protecting sleeve and stretches into the positioning hole after being in matched connection with the sampling interface. According to the system, a temperature measurement bypass is omitted, so that the measurement accuracy is improved, and the measurement response time is shortened; and the mounting position of the narrow-range temperature gauge on the hot pipeline is determined based on the fluid mechanical emulation modeling analysis, and the narrow-range temperature gauge on the hot pipeline is arranged in the optimal regions in a flow field and a temperature field, so that the measurement accuracy is improved.
Description
technical field [0001] The invention relates to the field of nuclear power plant monitoring, in particular to a system and method for measuring the temperature of a coolant in a main pipeline of a nuclear power plant reactor. Background technique [0002] In nuclear power plants, the coolant in the main pipe of the reactor coolant system (RCP) is used to take away the heat in the reactor and transfer it to the secondary side steam generator. And monitoring plays a very important role. [0003] In the prior art, a platinum thermal resistance thermometer is used to measure the temperature of the coolant in the main pipeline of a nuclear power plant, and the thermometer is inserted into the coolant to monitor the temperature of the coolant in real time. Thermal resistance, that is, resistance thermometer, is an instrument that uses semiconductors such as metal conductors or metal oxides as temperature measuring media, and uses its resistance value that changes with temperature...
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IPC IPC(8): G21C17/02
CPCG21C17/02Y02E30/30
Inventor 程超田骏田亚杰苟晓龙宋磊
Owner 中广核工程有限公司