Comparison experiments for radon and thoron measuring instruments at low-level concentrations in one room of a Japanese concrete building. (July 2021)

• Record Type: Journal Article
• Authors: Sorimachi, Atsuyuki; Nagamatsu, Yuichi; Omori, Yasutaka; Ishikawa, Tetsuo
• Is Part Of: Applied radiation and isotopes. Volume 173(2021)
• Publication Date: 2021-07
• Subjects: Radon -- Passive -- Scintillation cell -- Semiconductor -- Thoron; Radiology -- Periodicals; Radiation -- Industrial applications -- Periodicals; Nuclear chemistry -- Periodicals; Internet resource; Periodical; 660.298
• DOI: 10.1016/j.apradiso.2021.109696
• Languages: English
• ISSNs: 0969-8043

Abstract

Abstract: A comparison on commercially available radon ( 222 Rn) measuring instruments (three types of continuous monitors and a passive 222 Rn-thoron ( 220 Rn) discriminative alpha track detector) was carried out at low-level concentrations in one room of a concrete building. The agreements between the continuous monitors were within 15%, while the agreements between each instrument were within 20%. It was also observed that the indoor 220 Rn concentration measured by the continuous monitor was quite different from those by the passive detectors due to the mean concentration less than the limit of detection of both measuring instruments. Highlights: Comparison for 222 Rn and 220 Rn measuring instruments was conducted at low-level concentrations indoors. A good agreement among the 222 Rn continuous monitors. Discrepancy between mean 222 Rn concentrations by the passive detector and the continuous monitors was within 20%. Quite difference between the 220 Rn concentrations measured by the continuous monitor and passive detector.