1. bookVolume 65 (2020): Issue 2 (June 2020)
Journal Details
License
Format
Journal
eISSN
1508-5791
First Published
25 Mar 2014
Publication timeframe
4 times per year
Languages
English
access type Open Access

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

Published Online: 29 May 2020
Volume & Issue: Volume 65 (2020) - Issue 2 (June 2020)
Page range: 95 - 98
Received: 27 Nov 2019
Accepted: 03 Feb 2020
Journal Details
License
Format
Journal
eISSN
1508-5791
First Published
25 Mar 2014
Publication timeframe
4 times per year
Languages
English
Abstract

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.

Keywords

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.37.59.10.5453/jhps.37.59Search in Google Scholar

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.Search in Google Scholar

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.35.365.10.5453/jhps.35.365Search in Google Scholar

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)00536-4.10.1016/S0021-8502(99)00536-4Search in Google Scholar

5. Jacobi, W. (1972). Activity and potential α-energy of 222Rn and 220Rn-daughters in different air atmospheres. Health Phys., 22(5), 441–450. DOI: 10.1097/00004032-197205000-00002.10.1097/00004032-197205000-000025024729Search in Google Scholar

Recommended articles from Trend MD

Plan your remote conference with Sciendo