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Environmental radon monitor.
Killoran-LK; Holub-RF; Droullard-RF
Abstract Book, U.S. Department of the Interior Conference on the Environment and Safety, April 24-28, 1995. Washington, DC: U.S. Bureau of Mines, 1995 Apr; :28
In order to measure outdoor ambient radon, the U. S. Bureau of Mines Denver Research Center designed and developed a continuous Environmental Radon Monitor (ERM) that is about 50 times more sensitive than most commercially available instruments. The ERM is based on the classic two filter method of measuring radon with the addition of aerosols to attach to the radon progeny to reduce plateout and thereby increasing sensitivity. The two filter method of measuring radon uses a chamber through which air is drawn. The air passes through the first filter at the inlet to remove any progeny and then through the second filter, as it leaves the chamber, to catch progeny generated in the chamber. An alpha or beta counter is positioned over the exit filter to measure the collected radon progeny activity and, thus, the amount of radon in the chamber. The ERM performed satisfactorily over a period of more than two years at Operable Units IV/V of the Denver Radium Superfund Site and is suitable for measuring low levels of radon around uranium and other mines, as well as in any environment where radon levels are of concern.
Environmental-factors; Aerosols; Aerosol-sampling; Aerosol-particles; Filters; Filtration; Sensitivity-testing; Environmental-contamination; Environmental-health-monitoring; Uranium-compounds
Conference/Symposia Proceedings; Abstract
U.S. Bureau of Mines
Page last reviewed: September 2, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division