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EPA recommends that all homes should be monitored for radon. If testing shows levels less than 4 picocuries radon per liter of air (160 Bq/m 3), then no action is necessary. For levels of 20 picocuries radon per liter of air (800 Bq/m 3) or higher, the home owner should consider some type of procedure to decrease indoor radon levels. [1]
Mean continental concentration in the open air: 10 to 30 Bq/m 3. Based on a series of surveys, the global mean indoor radon concentration is estimated to be 39 Bq/m 3. 100: 2.7 Typical indoor domestic exposure. Most countries have adopted a radon concentration of 200–400 Bq/m 3 for indoor air as an Action or Reference Level. [65] 1,000: 27
A typical radon test kit Fluctuation of ambient air radon concentration over one week, measured in a laboratory. The first step in mitigation is testing. No level of radiation is considered completely safe, but as it cannot be eliminated, governments around the world have set various action levels to provide guidance on when radon concentrations should be reduced.
A gas detector is a device that detects the presence of gases in an area, often as part of a safety system. A gas detector can sound an alarm to operators in the area ...
The radon levels in some of the mines can reach 400 to 700 kBq m −3. [ 17 ] A common unit of exposure of lung tissue to alpha emitters is the working level month ( WLM ), this is where the human lungs have been exposed for 170 hours (a typical month worth of work for a miner) to air which has 3.7 kBq of 222 Rn (in equilibrium with its decay ...
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Typical flow rates, dew point, and residual radon concentration are 18 m 3 /h, −65 °C (@+1 kg/cm 2), and a few mBq m −3, respectively. Typical radon concentration in the dome air is measured to be 40 Bq m −3. [11] Radon levels in the mine tunnel air, near the tank cavity dome, typically reach 2000–3000 Bq m −3 during the warm season ...
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