Nuclear power plant pipeline leakage detection device and method based on distributed optical fiber temperature measurement

Abstract

The invention discloses a nuclear power plant pipeline leakage detection device and method based on distributed optical fiber temperature measurement. The nuclear power plant pipeline leakage detection device comprises a detection sensor unit, a signal receiving and transmitting processing unit and a data analysis and alarm unit. The detection sensor unit comprises an optical fiber and a fastening support, wherein the optical fiber is fixed to the portion above a high-energy pipeline through the fastening support. In the signal receiving and transmitting processing unit, a laser drive device is connected with the optical fiber through a wavelength division demultiplexer, the optical fiber is connected with the input end of a photoelectric detector through the wavelength division demultiplexer, and the output end of the photoelectric detector is connected with the input end of a signal processor. The data analysis and alarm unit comprises a PC terminal and an alarm indicator, wherein the output end of the signal processor is connected with the PC terminal, and the alarm indicator is connected with the PC terminal. The situation of high-energy pipeline system leakage in nuclear islands can be found in time, the leakage positions can be accurately positioned, the implementation foundation is provided for the leak-before-break design of the high-energy pipeline, and the safety of nuclear power plants is improved.

Description

technical field [0001] The invention belongs to nuclear power plant leakage detection technology, in particular to a nuclear power plant pipeline leakage detection device and method based on distributed optical fiber temperature measurement. Background technique [0002] With the construction and development of nuclear power in my country, more and more nuclear power plants have been put into operation. The society and the public pay more and more attention to the safety of nuclear power plants. Especially after the Fukushima nuclear power plant accident, to further systematically improve the operational safety of nuclear power plants has become not only a technical issue for the nuclear power industry, but also a social issue affecting the long-term stable development of the nuclear power industry. The nuclear power plant is designed with three safety barriers to protect the nuclear power plant from causing radiation pollution to the outside environment. The primary circui...

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Problems solved by technology

[0005] The invention provides a nuclear power plant pipeline leakage based on distributed optical fiber temperature measurement to overcome the deficiency that the existing leakage detection device based on temperature monitoring in nuclear power plants cannot measure the temperature in the continuous space of the primary loop pipeline system and judge the exact location of the leakage source The detection device and method, so as to realize the timely discovery of the leakage of the high-energy pipeline system in the nuclear island, and can accurately locate the leakage location, provide an implementation basis for the design of the high-energy pipeline leakage before breaking, and improve the safety of the nuclear power plant

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