Parameter sensitivity analysis of the theoretical model of a CR-39-based direct 222Rn/220Rn progeny monitor

• Autorzy: Hu Jun , Hosoda Masahiro , Tokonami Shinji

Identyfikatory

DOI

10.2478/nuka-2020-0014

• Konferencja: III International Conference „Radon in the Environment” (3 ; 27-31 May 2019 ; Krakow, Poland)
• Języki publikacji: EN

Abstrakty

EN

The deposition-based direct indoor 222Rn and 220Rn progeny measurement techniques are mostly affected by the indoor environmental conditions, such as the ventilation, concentration of condensation nuclei, and reactions with the structure and its furnishings. In this study, a theoretical model of a direct 222Rn and 220Rn progeny monitor based on allyl diglycol carbonate (ADC or CR-39) was established to analyse the factors that influence the detection process by using the parameter sensitivity analysis. The aerosol parameters contributed the highest to the variance, followed by the aerodynamic parameters. With respect to the result of the Spearman’s correlation analysis, the aerosol-related and the room-related parameters are positive, whereas the aerodynamic parameters – which affect the turbulence of indoor deposition – are negative. It means that both the attachment process and the deposition process of 222Rn and 220Rn progenies are important to the performance of the progeny monitor.

Słowa kluczowe

EN

222Rn; 220Rn progeny; parameter sensitivity analysis; theoretical model

• Wydawca: Institute of Nuclear Chemistry and Technology
• Czasopismo: Nukleonika
• Rocznik: 2020
• Tom: Vol. 65, No. 2
• Strony: 95--98
• Opis fizyczny: Bibligr. 5 poz., rys.

Twórcy

autor

Hu Jun

• Department of Radiation Sciences Graduate School of Health Sciences Hirosaki University 66-1 Hon-cho, Hirosaki, Aomori 036-8564, Japan
• Japan Society for the Promotion of Science Tokyo, Japan

autor

Hosoda Masahiro

• Department of Radiation Sciences Graduate School of Health Sciences Hirosaki University 66-1 Hon-cho, Hirosaki, Aomori 036-8564, Japan
• Institute of Radiation Emergency Medicine Hirosaki University 66-1 Honcho, Hirosaki, Aomori 036-8564, Japan

autor

Tokonami Shinji

• Institute of Radiation Emergency Medicine Hirosaki University 66-1 Hon-cho, Hirosaki, Aomori 036-8564, Japan

Bibliografia

• 1. Tokonami, S., Sun, Q., Yonehara, H., & Yamada, Y. (2002). A simple measurement technique of equilibrium equivalent thoron concentration with a CR-39 detector. Jpn. J. Health Phys., 37(1), 59–63. DOI: 10.5453/jhps.37.59.
• 2. Mishra, R., & Mayya, Y. S. (2008). Study of a deposition-based direct thoron progeny sensor (DTPS) technique for estimating equilibrium equivalent thoron concentration (EETC) in indoor environment. Radiat. Meas., 43(8), 1408–1416. DOI: 10.1016/j.radmeas.2008.03.002.
• 3. Zhuo, W., & Iida, T. (2000). Estimation of thoron progeny concentration in dwellings with their deposition rate measurements. Jpn. J. Health Phys., 35(3), 365–370. DOI: 10.5453/jhps.35.365.
• 4. Lai, C. K., & Nazarff, W. (2000). Modeling indoor particle deposition from turbulent flow onto smooth surfaces. J. Aerosol Sci., 31(4), 463–476. DOI:10.1016/S0021-8502(99)00536-4.
• 5. Jacobi, W. (1972). Activity and potential α-energyof 222Rn and 220Rn-daughters in different air atmospheres. Health Phys., 22(5), 441–450. DOI:10.1097/00004032-197205000-00002.

Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).