What is the maximum permissible occupational dose of radiation exposure in a year?

The maximum permissible occupational dose of radiation exposure in a year is set at 50 millisieverts (mSv) for radiation workers according to regulatory guidelines provided by organizations like the International Commission on Radiological Protection (ICRP) and the National Council on Radiation Protection and Measurements (NCRP). This limit is established to balance the benefits of working with radiation while protecting workers from potential health risks.

The 50 mSv limit allows for sufficient exposure in many occupational settings while also accounting for the cumulative nature of radiation exposure and its associated risks. Regular monitoring and exposure assessment are crucial in environments where employees may be exposed to ionizing radiation. The established dose limits are intended to minimize the risk of stochastic effects, which are health effects that occur by chance and increase with the amount of radiation exposure, such as cancer.

Options that suggest lower maximum doses, such as 20 mSv, 100 mSv, or 5 mSv, do not reflect the accepted limits for occupational exposure for workers in regulated settings. The values proposed in the other options may indicate safety thresholds for specific circumstances or groups but do not apply to the general occupational limit for radiation exposure, which is specifically established at 50 mSv.