An anti-pollution high-concentration tritium gas monitoring ionization chamber

Abstract

The invention discloses an anti-pollution high-concentration tritium monitoring ionization chamber, which comprises an ionization chamber shell, an electrode assembly, a front socket and a front shield box. One end of the ionization chamber housing is sealingly connected with the front socket and forms a sealed cavity for high-concentration tritium gas to enter and exit together with the front socket, An inlet pipe and an exhaust pipe are arranged on the shell of the ionization chamber, and an amplifier respectively connected with the front socket and the ionization outdoor controller is arranged in the front shield box, and the amplifier is used for outputting measurement data to the ionization outdoor controller; The electrode assembly includes a front electrode plate, a back electrode plate, a center copper electrode, and a collector electrode composed of conductive filaments, the center copper electrode being connected to a + 100V DC voltage to form an electric field between the center copper electrode and the collector electrode. The invention has the advantages of simple structure, scientific and reasonable design, convenient use and good sealing performance, can effectivelyreduce the contact area between tritium gas and the ionization chamber wall, and has the anti-pollution function.

Description

technical field [0001] The invention belongs to the technical field of radiation monitoring, in particular to an anti-pollution high-concentration tritium gas monitoring ionization chamber. Background technique [0002] Tritium is a low-energy β nuclide with a maximum energy of 18keV and an average energy of 5.7keV, because the maximum range of its β particles in water is only 6μm and in air is 5mm. General tritium measurement methods include liquid scintillation tritium measurement, bubbler tritium measurement, flat panel imaging tritium measurement and ionization chamber tritium measurement. The measurement of tritium can be divided into three fields according to the monitoring objects - process monitoring, radiation protection monitoring and environmental monitoring. Process monitoring is associated with process control in tritium production and processing facilities. Detectors and monitors that can directly measure and provide an instant indication of the sample being a...

AI Technical Summary

Problems solved by technology

But there are also serious problems. The ionization chamber measures high concentrations (tritium concentrations greater than 1MBq / m 3 ) tritium, due to the characteristics of gaseous tritium, it is easy to adsorb on the inner wall of the ionization chamber, causing contamination of the ionization chamber, increasing the current signal generated by the ionization chamber, and bringing inaccuracy to the monitoring data; clean air is usually used to clean the ionization chamber, But it often takes more than ten hours, even several days, which brings inconvenience to the work

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