A CFD-based approach to optimize operating parameters of a flow-through scintillation cell for measurement of 220Rn in indoor environments

被引：3

作者：

Agarwal, Tarun Kumar ^{[1
,2
]}

Gaware, Jitendra Jalindar ^{[2
]}

Sapra, Balvinder Kaur ^{[1
,2
]}

机构：

[1] Homi Bhabha Natl Inst, Mumbai 400094, Maharashtra, India

[2] Bhabha Atom Res Ctr, Radiol Phys & Advisory Div, Mumbai 400085, Maharashtra, India

来源：

ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH | 2022年 / 29卷 / 11期

关键词：

CFD simulation; Lucas scintillation cell; Flow rate; Inlet needle length; Efficiency; Thoron decay products; PARTICLE DEPOSITION; DELAY CHAMBER; THORON; RADON; SIMULATION; EXPOSURE; BEHAVIOR; DTPS; GAS;

D O I：

10.1007/s11356-021-16780-4

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The measurements and monitoring of Rn-222/Rn-220 have been of emerging interest in occupational environments particularly in radium/thorium handling facilities and environments with monazite deposits for the inhalation dosimetry. The performance of a flow-through Lucas scintillation cell (LSC) for long run Rn-220 measurements, depends upon the exact distribution pattern of Rn-220 and its decay products in the LSC which can vary with the design of inlet path and flow rates. In this work, the CFD technique has been used to study the concentration profiles of Rn-220 and its decay products in LSC for varying flow rates and inlet needle lengths. The variation of alpha production efficiency (eta(alpha)) is computed and analyzed for each case; aiming to select the best operating range of parameters for the optimum performance of LSC for Rn-220 measurements. It is seen that LSC can be operated in the flow rate ranging from 0.6 to 1 lpm with inlet needle length varying from 22.5 to 45 mm for improved sensitivity.

引用

页码：16404 / 16417

页数：14

共 45 条

[1] Effect of 220Rn gas concentration distribution on its transmission from a delay chamber: evolving a CFD-based uniformity index [J].