The alpha dose per unit radon daughter exposure in mines and homes is comparable at about 5 mGy/WLM. This means that excess lung cancer risk determined in follow-up studies of miners should be valid to extrapolating to environmental populations. There are several models currently used for risk projection to estimate lung cancer in the U.S. from indoor radon exposure. The accuracy of the estimat...

The Ohio Radon Information System (ORIS) internet site at http://www.uioledo.edu/-aprs/oris/ is one of the most comprehensive sites on indoor radon available on the World Wide Web. It was developed by the authors under a research grart from the Ohio Department of Health and U.S. Environmental Protection Agency. It is estimated that from 700 to 1300 people die annually in Ohio from radoninduced ...

Telah dilakukan pengukuran konsentrasi gas radon (Rn-222) dan thoron (Rn-220) menggunakan detektor CR-39 pada ruangan kelas di Kota Lubuk Basung. Penelitian bertujuan untuk menentukan data awal dalam ruangan, kemudian ditinjau berdasarkan ICRP Publikasi No. 126 tahun 2014. Pengukuran sebanyak 50 buah yang dipasang selama 3 bulan 9 lokasi sekolah. Detektor selanjutnya dietsa larutan NaOH 6,25N 7...

The highest time-averaged indoor radon concentrations for a slab-on-grade structure occur when the structure experience neutral pressure conditions. Experimental evidence was provided throughout the utilization of the University of Florida Radon Research House (UFRRH) showing that semi-diurnal atmospheric pressure variations are responsible for continuous pumping of radon-rich soil gas into the...

The 1988 National Academy of Sciences report on radon health risks evaluated the combined effects of radon exposures and cigarettes on the lung cancer risk to smokers. This report showed that the risk of lung cancer is about 10 times greater for smokers than for nonsmokers at the same Working Level exposures. In 1986, the Surgeon General reported that 106,000 lung cancer deaths occurred among s...

Accurate measurement of low-level thoron gas and high-accuracy calibration devices are essential for assessing preventing radiological risks. This study aimed to develop a technique using an airflow-through scintillation cell both calibration. To achieve this, compartment model was developed estimate the influence progeny deposition accumulation on wall prevent overestimation thoron. A self-dev...

There are many indoor pollutants in the residential buildings. Of those radon is a major and harmful indoor pollutant in most countries. Radon sometimes entries to the house through building materials. High insulation and tightness in order to increase energy efficiency and to lower energy costs is led to the indoor air quality problems. Ventilation is a good method to dilute radon contaminant ...

The potential risk of indoor radon for the public in Switzerland has been comprehensively investigated by the Federal Office of Public Health since 1994. Numerous radon measurements have been carried out to da te and they show that several regions in Switzerland are affected by high levels of radon exposure. In a pilot study different methods of indoor radon prevention and remediation have been...