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A walk-in type calibration chamber facility for 222Rn measuring devices and inter-comparison exercises
https://repo.qst.go.jp/records/77283
https://repo.qst.go.jp/records/772837c998f7a-52cf-4ec7-afa0-66c32767e8ae
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2019-11-01 | |||||
| タイトル | ||||||
| タイトル | A walk-in type calibration chamber facility for 222Rn measuring devices and inter-comparison exercises | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
| 資源タイプ | journal article | |||||
| アクセス権 | ||||||
| アクセス権 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
Trilochana, S
× Trilochana, S× M Somashekarappa, H× Sudeep Kumara, K× P Mohan, M× Rashmi Nayak, S× Renita, Shiny D’Souza× S Kamath, Srinivas× K Sahoo, B× J Gaware, J× K Sapra, B× Janik, Miroslaw× Darwish, Al-Azmi× S Mayya, Y× Karunakara, N× Janik, Miroslaw |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | A walk-in type 222Rn calibration chamber of volume 22.7 m3, which has traceability to international standards, is established at the Centre for Advanced Research in Environmental Radioactivity, Mangalore University, India. It has a human–machine interface communication system, a programmable logic controller and sensor feedback circuit for controlling and data acquisition of relative humidity (RH) and temperature (T). An innovative method for the generation of desired 222Rn concentration (a few hundred Bq m−3 up to about 36 kBq m−3) using soil gas as a source was adopted. Leak rates of 222Rn from the chamber for the mixing fan ON and OFF conditions were determined to be 0.0011 and 0.00018 h−1 respectively. With the exhaust system fully turned on, the maximum clearance rate of the chamber was 0.58 ± 0.07 h−1. Excellent spatial uniformity in 222Rn concentration in the chamber was confirmed (with a mean value of relative standard deviation < 12%) through measurements at 23 locations using CR-39 film-based passive devices. Demonstration of calibration applications was performed using charcoal canister and PicoRad vials as the 222Rn adsorption devices. The study shows that gamma spectrometry is a convenient alternative approach to liquid scintillation analysis of PicoRad vials for 222Rn measurement. | |||||
| 書誌情報 |
Radiation Protection Dosimetry 巻 187, 号 4, p. 466-481, 発行日 2019-10 |
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| 出版者 | ||||||
| 出版者 | Oxford University Press | |||||
| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 0144-8420 | |||||
| DOI | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | 10.1093/rpd/ncz188 | |||||
| 関連サイト | ||||||
| 識別子タイプ | URI | |||||
| 関連識別子 | https://academic.oup.com/rpd/advance-article/doi/10.1093/rpd/ncz188/5608969 | |||||
