18F digital conforming monitoring device and monitoring method

Abstract

The invention discloses a 18F digital conforming monitoring device and monitoring method, and relates to the technical field of radioactive leakage monitoring of a nuclear power plant. The 18F monitoring device comprises a lead shielding shell, a paper feeding mechanism, a plastic scintillator detector, a NaI detector, a photomultiplier A, a photomultiplier B, a pre-amplifier A, a pre-amplifier B,a main amplifier A, a main amplifier B, a pulse screening forming circuit A, a pulse screening forming circuit B, a high-speed data acquisition card and a computer. The 18F monitoring method is applied to the 18F digital conforming monitoring device. The 18F digital conforming monitoring device can be applied to the leakage monitoring of coolant water at the pressure boundary of the reactor primary circuit of the nuclear power plant, the radioactive activity of 18F mote in a reactor primary circuit containment can be measured on line, whether the reactor has the coolant water leakage or not is judged in real time, and the leakage rate of the coolant water is obtained by calculating.

Description

technical field [0001] The invention relates to the technical field of nuclear power plant radioactivity leakage monitoring, in particular to a 18 The F number conforms to the monitoring device and monitoring method. Background technique [0002] The pressure boundary of the primary circuit of the nuclear power plant reactor contains high temperature (+280℃~+320℃), high pressure (1.55Mpa), and coolant water with α, β, γ radioactivity, as well as the effects of mechanical wear and chemical corrosion, the primary circuit of the reactor Cracks and fissures can develop in the pressure boundary, allowing coolant water to leak. [0003] Once this kind of abnormal leakage occurs, the radioactive coolant water in the primary circuit will enter the containment vessel, causing air pollution in the containment vessel, and at the same time, it will cause a water loss accident in the reactor core, directly affecting the normal operation of the nuclear power plant and even the nuclear po...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the invention is to overcome the deficiencies of the prior art, and provide a 18 The F number conforms to the monitoring device and monitoring method, which is used to monitor the nuclear power plant containment 18 F activity, eliminating monitoring inside the containment 18 Various interferences in the radioactivity of F have increased 18 F detection efficiency, which solves the problem that the existing technology cannot accurately monitor the leakage rate of coolant water at the pressure boundary of the primary circuit

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