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Effect of a grounded object on radon measurement using AlphaGUARD
Hirokazu Ichitsubo1, Yuji Yamada
1Radon Research Group, Research Center for Radiation Safety, National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage, Chiba 263-8555, Japan. tsubo@nirs.go.jp
Abstract:
ABSTRACT-: The effects on radon concentration measurement of a grounded object near the opening of a cylindrical ionization chamber were studied using AlphaGUARD. AlphaGUARD comes with a flow measurement adapter that fits on the front of the AlphaGUARD ionization chamber. If the adapter nozzle is grounded, the radon concentration is falsely measured at 0 Bq m. A metal connector for use between the AlphaGUARD and the air duct wall was manufactured in our laboratory. When the connector is grounded, the radon concentration is again falsely measured as 0 Bq m. If the nozzle or connector is ungrounded, the AlphaGUARD measures radon concentration accurately. Health Phys.
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