14/08/2021
Time, Distance, and Shielding: Three Principles That Work Together
Image of patient having x-ray with technician behind barrier
You can see how these principles work together when you have an x-ray at your doctor’s office or clinic. The radiation technician goes behind a barrier while taking the x-ray image to protect them from the repeated daily exposure to radiation.
In the case of a radiation emergency, you can use time, distance, and shielding to protect yourself and your family.
Time
person sheltering inside of building
If a radiation emergency happens, one of the best things you can do is get inside a stable building as quickly as possible.
Distance
How long you need to stay inside will depend on the incident and the amount of damage to critical infrastructure, like roads and bridges. Once roads and bridges are cleared, emergency officials may instruct you to leave the area.
Shielding
person sheltering in basement
If you are in a multistory building, move to the center floors.
If you are in a single story building, stay in the center away from windows, doors, and exterior walls.
You can also take shelter in a basement.
