As a result, it will take 48 hours for potassium-42 radiation levels to drop to 1/16 of their initial levels.
The average annual radiation exposure per person in the United States is 6.2 millisieverts (620 millirem), according to the National Council on Radiation Protection and Measurements (NCRP). These average dose's sources are depicted in the pie chart below. The average annual radiation exposure per person in the United States is 6.2 millisieverts (620 millirem), according to the National Council on Radiation Protection and Measurements (NCRP). These average dose's sources are depicted in the pie chart below. The primary source of exposure for the majority of people is naturally occurring background radiation. Although they can exceed 50 mSv/yr, they normally fall between 1.5 and 3.5 millisievert per year.
As low as reasonably possible, but not more than 5,000 millirems. It is advised that the total lifetime exposure not exceed the age times 1,000 millirems. The annual occupational limit for minors under 18 who are exposed to radiation is 500.
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