Results 131 to 140 of about 1,326 (179)
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Multi-state Surveys of Indoor 222Rn
Health Physics, 1989The U.S. Environmental Protection Agency provides assistance to states in conducting surveys of indoor 222Rn. Alabama, Kentucky, Tennessee, Wisconsin, and Wyoming completed statistically designed surveys during the 1986-1987 heating season. In all states, probability-based samples of 5800 houses were tested using charcoal canisters exposed for 48 h ...
S B, White +3 more
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Recent Swedish Experiences in 222Rn Control
Health Physics, 1990Swedish local authorities are responsible for decreasing 222Rn progeny concentrations in homes in their municipalities. To obtain an overall view of their experiences, concerned national authorities sent a questionnaire in 1986 to local authorities. The results were intended to form one basis for decisions by the government regarding revised statements
G A, Swedjemark, A, Mäkitalo
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222Rn and 212Pb exposures at a Brazilian spa
Radiation Protection Dosimetry, 2010Termas de Araxá spa is located in Araxá, State of Minas Gerais. In this region, several minerals rich in uranium and thorium are found. The mineral waters and mud from Termas de Araxá spa have been used for therapeutic and recreation purposes. In this study, the committed effective dose was evaluated for workers and patients at Araxá spa due to (222)Rn
M P, Campos +2 more
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Two-filter monitor for atmospheric 222Rn
Review of Scientific Instruments, 1980A two-filter, continuous monitor has been developed for atmospheric 222Rn. Features include a sensitivity of better than 0.01 pCi/l, a high specificity for 222Rn, and immediate start up capability. The monitor has been computer modeled to facilitate calibration and selection of operating parameters.
S D, Schery +2 more
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Measurement of 222Rn Concentration in Kenyan Groundwater
Health Physics, 1998Groundwater samples from different parts of Kenya have been analyzed for their 222Rn concentrations. Samples were drawn from municipal supplies, springs, wells and bore holes in different geological terrains. In the analysis, conventional liquid scintillation counting, using the Packard protocol for measuring radon in water, was employed.
Otwoma, D, Mustapha, AO
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Optimum 222Rn-adsorbing Activated Charcoals
Health Physics, 1992Adsorptive and desorptive data are presented for 20 activated charcoal (AC) types that may be used in passive 222Rn sampling devices. Open-faced AC canisters were exposed for 3 d at room temperature to known radon and water vapor concentrations. Gamma measurements of radon progeny activity show that the optimum radon-adsorbing ACs are Calgon-PCB, Norit
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How to Screen for 222Rn in Large Buildings
Health Physics, 1996222Rn measurements have been made in over 10,000 ground-contact rooms in 908 federal buildings. These data were examined statistically to compare parametric distributions that might be useful in the design and execution of future surveys of indoor 222Rn in large buildings.
C S, Dudney +3 more
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Airborne 222Rn Concentration in Cypriot Houses
Health Physics, 1993Studies from a pilot survey in 89 houses in Cyprus show that the arithmetic mean for the housing stock is about 7 Bq m-3 and the annual effective dose equivalent to the population from radon progeny is < 330 microSv y-1. Four houses have values > 30 Bq m-3, corresponding to two standard deviations from the mean value.
S, Christofides, G, Christodoulides
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Indoor 222Rn Concentrations in Istanbul Houses
Health Physics, 1993Indoor average 222Rn concentrations have been measured in more than 400 houses in Istanbul city. The average radon concentrations in the houses were found to be between 10 Bq m-3 and 260 Bq m-3 and the mean value was 50 Bq m-3.
E M, Köksal, N, Celebi, B, Ozçinar
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Health Physics, 1998
222Rn flux (Bq s(-1)) was measured from the ends of twenty sections of produced water injection tubing (pipe) containing barite scale contaminated with naturally occurring radioactive material. Exposure measurements near the pipes were as high as 77.4 nC kg(-1)h(-1) (300 microR h(-1)). Flux measurements were accomplished by first purging the pipes with
A S, Rood, G J, White, D T, Kendrick
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222Rn flux (Bq s(-1)) was measured from the ends of twenty sections of produced water injection tubing (pipe) containing barite scale contaminated with naturally occurring radioactive material. Exposure measurements near the pipes were as high as 77.4 nC kg(-1)h(-1) (300 microR h(-1)). Flux measurements were accomplished by first purging the pipes with
A S, Rood, G J, White, D T, Kendrick
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