Tritium measurement device based on well-shaped ionization chamber

Abstract

The invention relates to the technical field of nuclear radiation detection, and provides a tritium measurement device based on a well-shaped ionization chamber. The tritium measurement device comprises a gamma compensation ionization chamber and a tritium measurement ionization chamber, the gamma compensation ionization chamber uses the structure of the well-shaped ionization chamber, the signalsare independently read out, and the gas flow type tritium measurement ionization chamber is a cylindrical ionization chamber and is installed at the central position of the well-shaped ionization chamber. According to the invention, the gas flow type tritium measurement ionization chamber is arranged at the central position of the well-shaped ionization chamber, and the signal reading and the well-shaped ionization chamber are independent from each other and do not interfere with each other, so that the complexity of the system is reduced, the machining and assembly are convenient, and meanwhile the problem that the reading of the coaxial ionization chamber is unstable due to the fact that the collector cylinders of the two ionization chambers are different in insulation, is solved.

Description

technical field [0001] The invention relates to the technical field of nuclear radiation detection, in particular to a tritium measuring device based on a well-shaped ionization chamber. Background technique [0002] Tritium is an isotope of hydrogen. Tritium usually exists in gaseous (HT or T2) and oxide (HTO or T2O) states. It is a low-energy β radionuclide. The maximum energy of β particles is 18.6KeV, and its half-life is 12.3 year. Tritium is one of the important nuclides in the primary circuit of nuclear reactors, and its concentration is about ~10 10 Bq / m3. Tritium present in the primary circuit water can cause radiation hazards to personnel through the leakage of the reactor coolant pressure boundary, the expansion of the coolant during the cold start of the reactor, and the release of water at the low point of the equipment. Therefore, it is necessary to measure the tritium concentration in the air in real time to ensure personnel safety. [0003] The maximum en...

AI Technical Summary

Problems solved by technology

However, because four ionization chambers are used, the system becomes complicated, which will increase the volume and weight of the system, which is not conducive to portable use. At the same time, when the radioactive source is closer to the ionization chamber, the compensation effect will also be poor.

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