Gaseous tritium activity measuring device

Abstract

The invention discloses a gaseous tritium activity measuring device comprising a detection unit, a signal obtaining unit and a central processor, wherein the signal obtaining unit enables signals detected by the detection unit to form pulse signals in corresponding amplitude and transmits the signals to the central processor for counting, analysis and processing. The device further comprises a vacuum unit, wherein the vacuum unit achieves communication or blocking of connected equipment such as a proportional counter, a helium leak detector, a gas cylinder and a vacuum suction pump through a tee joint and valves so as to bring convenience to vacuumizing of the proportional counter or filling gas in the gas cylinder. The device is simple in structure and strong in operability. Due to the effective vacuumizing method, the device can remove tritium gas remained in the proportional counter and the gas cylinder, lowers the background and detection limit of the detection unit, achieves high-precision and efficient measurement of activity of the low-activity gaseous tritium, and improves detection efficiency of the detection unit.

Description

technical field [0001] The invention relates to tritium activity measurement in nuclear radiation detection, in particular to a low-activity gaseous tritium activity measurement device. Background technique [0002] Tritium is a low-energy β-emitter that widely exists in the environment. Natural tritium exists in very small amounts in nature, and is mainly formed by the bombardment of 16O and 16N in the atmosphere by neutrons and protons in cosmic rays. After human tritium production activities, all kinds of tritium discharged to the surface or atmosphere in the form of gas, liquid or solid constitute an important part of environmental tritium sources. Tritium is an important radioactive gas nuclide emitted by the fission power operation reactor. The tritium leaked into the surrounding environment by various nuclear facilities will cause the increase of tritium activity in the surrounding environment atmosphere. The staff working in the nuclear power plant reactor building ...

AI Technical Summary

Problems solved by technology

The large amount of gas amplification in the proportional counter is the main reason why the output signal is a pulse signal. The traditional measuring device cannot accurately process and analyze the signal output by the proportional counter, and the nuclear radiation signal may be submerged or the spectrum peaks may overlap. Cause the phenomenon of "miscounting" and "missing counting"

Images