Which equation is used to calculate the accumulated Maximum Permissible Dose (MPD) for radiation exposure?

The equation used to calculate the accumulated Maximum Permissible Dose (MPD) for radiation exposure is based on the age of the individual in relation to a benchmark age of 18. The equation takes into account that prior to 18 years of age, an individual should have a lesser accumulated dose due to their increased sensitivity to radiation. Therefore, the formula of 5(n-18) is correct, where 'n' represents the age of the individual in years.

In this formula, the constant '5' indicates the allowable dose of radiation per year after the age of 18, multiplied by the number of years beyond this age (n - 18). This means that individuals over 18 are allotted a maximum of 5 rems per year, accumulating as they age. For instance, if someone is 30 years old, the calculation would be 5(30 - 18) which leads to an MPD of 60 rems, illustrating the accumulated exposure allowable for that individual based on their age.

This approach reflects the need to balance occupational radiation exposure with the health and safety of individuals working in environments where they may encounter radiation.