What is the purpose of administering potassium iodide in radiation safety?

Administering potassium iodide is specifically intended to prevent the uptake of radioactive iodine by the thyroid gland. When a nuclear incident occurs, radioactive iodine can be released into the environment and subsequently absorbed by the thyroid, increasing the risk of thyroid cancer and other health issues. Potassium iodide acts by saturating the thyroid with non-radioactive iodine, thereby blocking the absorption of any radioactive iodine that might be present. This protective measure is critical during radiation emergencies to safeguard the thyroid gland and minimize the health risks associated with exposure to radioactive iodine isotopes.

The other choices do not accurately reflect the role of potassium iodide in radiation safety. For instance, while potassium iodide does have a role in certain medical treatments, it does not enhance radiotherapy or detoxify the body from radiation exposure, nor does it promote tissue healing. Its primary function in the context of radiation safety is to protect the thyroid from radioactive iodine uptake, making option B the correct choice.