COLLECTION UNIT, RADIOACTIVE GAS MONITORING DETECTOR AND RADIOACTIVE GAS MONITOR

摘要

PROBLEM TO BE SOLVED: To provide a collection unit for reliably passing radioactive gas through an adsorbent and concentrically collecting radioactive substances onto a specific position, a radioactive gas monitoring detector capable of achieving improvement of geometrical counting efficiency of detection of radiation radiated from the specific position of the collection unit and reduction of a background, and a radioactive gas monitor capable of performing highly reliable monitoring by using the radioactive gas monitoring detector.SOLUTION: The collection unit includes: a radioactive gas inflow path which is placed in storage space of a container and an aperture of which for an adsorbent for adsorbing radioactive substances included in radioactive gas is located near the bottom of the container; and a gas outflow path for exiting the radioactive gas having passed through the adsorbent. The radioactive gas monitoring detector reliably detects radiation from the adsorbent of the collection unit by a detection unit including a well type scintillator. The radioactive gas monitor is loaded with the radioactive gas monitoring detector.