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Ventilation property of a passive-type radon-thoron discriminative detector
https://repo.qst.go.jp/records/70711
https://repo.qst.go.jp/records/70711d4435336-9b8c-4810-ae2e-e4325552fd79
| Item type | 会議発表用資料 / Presentation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2012-03-08 | |||||
| タイトル | ||||||
| タイトル | Ventilation property of a passive-type radon-thoron discriminative detector | |||||
| 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_c94f | |||||
| 資源タイプ | conference object | |||||
| 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 |
Omori, Yasutaka
× Omori, Yasutaka× Miroslaw, JANIK× Sorimachi, Atsuyuki× Ishikawa, Tetsuo× Tokonami, Shinji× 大森 康孝× ミロソラフ ヤニック× 反町 篤行× 石川 徹夫× 床次 眞司 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Among the sources, naturally-originated radon isotopes (radon and thoron) are considered to be a significant factor to human exposure. For investigating their contributions, there are two considerations in the measurement of the concentrations: (1) the discrimination of radon and thoron and (2) the long-term measurement in widespread area. Based on the above concepts, the National Institute of Radiological Sciences developed a passive-type radon-thoron discriminative detector, commercially called Raduet, and has provided worldwide in many indoor survey. The detector consists of diffusion chambers with different ventilation rate where CR-39 chips are deployed. This characteristic allows to determine radon and thoron concentration discriminatively. On the other hand, inside air is not easily replaced with outside fresh air in the chamber with low ventilation rate compared to the other one, so that one needs a special care against the possibility that the remained air after the exposure disturbs the estimation of radon and thoron concentration. This effect should also be considered in a calibration experiment to assure the performance of the radon-thoron discriminative detector as well as in a survey in high-background area. In this presentation, ventilation rate of the diffusion chambers is derived and, based on the result, temporal variations of radon and thoron concentrations in each chamber are simulated. In addition, the contribution of the remained air after the exposure to the estimation of radon and thoron concentration is discussed. |
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| 会議概要（会議名, 開催地, 会期, 主催者等） | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | International Symposium on Natural Radiation Exposures and Low Dose Radiation Epidemiological Studies | |||||
| 発表年月日 | ||||||
| 日付 | 2012-03-03 | |||||
| 日付タイプ | Issued | |||||
