What are the main components of the ALARA principle?

The ALARA principle, which stands for "As Low As Reasonably Achievable," is a fundamental concept in radiation safety aimed at minimizing exposure to ionizing radiation. The main components of this principle emphasize methods to effectively reduce radiation dose to workers and the public while taking into account economic and societal factors.

The correct components of the ALARA principle are distance, time, and shielding.

• Distance: This involves maximizing the distance between the radiation source and individuals, thereby reducing exposure. The intensity of radiation decreases significantly with increased distance from the source, following the inverse square law.

• Time: Limiting the amount of time spent near a radiation source is crucial. The longer an individual is exposed to radiation, the greater the dose received. Minimizing exposure time effectively reduces the total radiation dose.

• Shielding: Using appropriate materials to shield individuals from radiation is another key component. Different types of radiation (alpha, beta, gamma) require specific shielding materials. This can involve using lead, concrete, or other materials to block harmful radiation.

These components work together to ensure that radiation exposure remains as low as reasonably achievable, balancing safety with practical considerations. The other options provided do not accurately capture all the essential aspects of the