Gas radioactivity concentration measuring device, gas radioactivity concentration measuring system and gas radioactivity concentration measuring method

摘要

PROBLEM TO BE SOLVED: To achieve a reduction in size and weight and to measure gaseous activity concentration.SOLUTION: A gaseous activity concentration measuring apparatus 100 measuring activity concentration of gas as an object includes: a measurement container 22 receiving and storing the gas as the object; a pressurizing device 50 pressurizing the gas in the measurement container 22; and a radiation detector 21 detecting radiation from the gas in a state to be pressurized in the measurement container 22. In this case, the pressurizing device 50 may include: pumps 12a and 12b pumping the gas to the measurement container 22; and a control valve 24 being provided at an outlet side of the measurement container 22 where the gas outflows from the measurement container 22 and decompressing the gas outflowing from the measurement container 22.