An optical fiber libs detection device and method used in the main pipeline of a nuclear power plant

Abstract

The invention discloses an optical fiber LIBS detection device and method used in the main pipeline of a nuclear power plant, comprising two parts: an optical fiber LIBS detector and a main control detection system; the main control detection system is installed in the main control room of the nuclear power plant, and the optical fiber LIBS detector enters the pipeline The detection operation is carried out inside, and the two are connected by the transmission optical fiber and the control signal line. The main control detection system of the present invention and the optical fiber LIBS detector are connected to the control signal line through a high-temperature-resistant high-power transmission optical fiber, and the remote on-line detection of the designated area of ​​the inner wall of the main pipeline of the nuclear power plant can be realized in the main control room of the nuclear power plant. The pipeline is pretreated, and the inner wall of the pipeline is slightly damaged or even non-destructive, which can realize rapid quantitative analysis of various elements at the same time, and the operation of the entire detection process is safe, reliable, and efficient.

Description

【Technical field】 [0001] The invention belongs to the technical field of laser diagnosis, and relates to an optical fiber LIBS detection device and method used in a main pipeline of a nuclear power plant. 【Background technique】 [0002] The status monitoring, maintenance and evaluation technology of the key structure of the reactor is an important support for the safety and economy of nuclear power. Conduct in-service and pre-service non-destructive testing. Due to the harsh operating environment of nuclear power plants such as high radioactivity, high temperature, and high pressure, conventional detection methods, such as X-ray photography technology, ultrasonic technology, and eddy current technology, are difficult to achieve long-distance online measurement. The newly developed remote online detection technologies such as acoustic emission technology and electrochemical technology also have their own limitations: for example, acoustic emission technology can only detect ...

AI Technical Summary

Problems solved by technology

Due to the harsh operating environment of nuclear power plants such as high radioactivity, high temperature, and high pressure, conventional detection methods, such as X-ray photography technology, ultrasonic technology, and eddy current technology, are difficult to achieve long-distance online measurement

The newly developed remote online detection technologies such as acoustic emission technology and electrochemical technology also have their own limitations: for example, acoustic emission technology can only detect the pressure wave signal emitted by the material being damaged, and cannot evaluate and predict its life ; Electrochemical technology needs to add small-amplitude electrical signal disturbance to the nuclear power system, which may cause adverse effects on the system

At present, my country has not yet established a laser-induced spectral database for nuclear power plant steel and quantitative measurement methods for its elemental components.

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