Concentration detection system used for polonium aerosol inside reactor workshop

Abstract

The invention relates to a concentration detection system used for polonium aerosol inside a reactor workshop. The concentration detection system used for the polonium aerosol inside the reactor workshop is composed of a laser light source (1), an interferometer (2), reactor workshop walls (3), a receiving telescope (4), a photoelectric conversion device (5), corner reflectors (6) and a computer processing system (7). In measurement, lasers sent by the light source are modulated through the interferometer (2) at first, and then are shot into a long-range absorbing light path and reflected and transmitted through a plurality of corner reflectors (6) on the reactor workshop walls (3), and finally are received by the receiving telescope (4), wherein he number of the corner reflectors is determined by the structure of the reactor workshop and the length of the absorbing light path. The photoelectric conversion device (5) converts received optical signals into electrical signals and sends the electrical signals to the computer processing system (7) to generate the Fourier spectrum, and concentration of the polonium aerosol is obtained through calculation. According to the concentration detection system used for the polonium aerosol inside the reactor workshop, rapid and accurate measurement of the polonium aerosol inside the reactor workshop becomes possible, and safety of the inside of the reactor and areas around the reactor is ensured.

Description

technical field [0001] The invention relates to the field of nuclear safety, in particular to a system capable of measuring the polonium aerosol concentration in a reactor in real time. Background technique [0002] Nuclear reactors generally produce many radioactive products. Therefore, the radioactivity detection of the nuclear reactor building is very important, which is related to the safety of the workers in the plant and the environment around the plant. [0003] In some reactors, the radioactive substance polonium-210 is produced (in the form of an aerosol). Since its concentration in the atmosphere is generally extremely small and its toxicity is extremely high, equipment and methods for quickly and effectively detecting the concentration of polonium 210 are required. At present, the commonly used detection method is electrochemical deposition and then detection by α-energy spectrometer (Kostadinoy K N et al: J Radioanal Chem42 (2): 411~415, 1978), but its disadvant...

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Problems solved by technology

At present, the commonly used detection method is electrochemical deposition and then detection by α-energy spectrometer (Kostadinoy K N et al: J Radioanal Chem42 (2): 411~415, 1978), but its disadvantage is that the detection time is very long, estimated to exceed 2h , unable to meet the needs of real-time and efficient

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