Development of a radon-aerosol chamber at NIRS - general design and aerosol performance

被引:28
作者
Ichitsubo, H [1 ]
Yamada, Y [1 ]
Shimo, M [1 ]
Koizumi, A [1 ]
机构
[1] Natl Inst Radiol Sci, Inage Ku, Chiba 2638555, Japan
关键词
radon-aerosol chamber; Rn-222; aerosol particle concentration control; environmental control; radon control;
D O I
10.1016/j.jaerosci.2003.08.002
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
A radon-aerosol chamber having an inner volume of approximately 25 m(3) has been developed at the National Institute of Radiological Sciences (NIRS). The chamber is designed to control temperature, relative humidity, aerosol concentration, radon concentration, and pressure differentials between inside and outside the chamber. We evaluated its performance as an aerosol chamber. Temperature and relative humidity can be controlled from 278 to 303 K, and 30% to 90%, respectively, and pressure differentials between inside and outside the chamber can be maintained at negative values. Temperature and relative humidity fluctuations are very small. The concentration of particles inside the chamber can be controlled from 10(8) to 10(10) m(-3). Particle concentrations and distributions are very stable. The particle concentration fluctuation is within the statistical error of the TSI CPC3010 particle counter. Changes in temperature and relative humidity had little effect on particle concentrations and their distributions. (C) 2003 Elsevier Ltd. All rights reserved.
引用
收藏
页码:217 / 232
页数:16
相关论文
共 15 条
[1]  
[Anonymous], 1994, ANN ICRP, DOI [10.1016/0146-6453(94)90004-3, DOI 10.1016/0146-6453(94)90004-3]
[2]  
[Anonymous], INT C SER
[3]   Intercomparison of radon and decay product measurements in an underground mine and EPA Radon Laboratory: A study organized by the IAEA international radon metrology programme [J].
Budd, G ;
Hopper, R ;
Braganza, E ;
Ronca-Battista, M ;
Steinhausler, F ;
Stegner, P .
HEALTH PHYSICS, 1998, 75 (05) :465-474
[4]  
FISENNE IM, 1999, EML PROCEDURES MANUA, V1
[5]  
GEORGE AC, 1988, RADIAT PROT DOSIM, V24, P273
[6]   Environmental control of the German radon reference chamber [J].
Honig, A ;
Paul, A ;
Rottger, S ;
Keyser, U .
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 1998, 416 (2-3) :525-530
[7]  
Howarth C. B., 2002, NRPBW6
[8]  
HOWARTH CB, 2002, NRPBW21
[9]  
KNUTSON EO, 1988, RADIAT PROT DOSIM, V24, P261
[10]   A reference aerosol for a radon reference chamber [J].
Paul, A ;
Keyser, U .
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 1996, 368 (03) :819-824