Radiation Protection

Internal Exposure

Internal exposure is calculated using special estimation methods.

Exposure to radiation when radioactive substances enter the human body is referred to as internal exposure. Exposure to radiation from outside the body is referred to as external exposure.

When internal exposure is publicized in mSv, the estimated value is calculated by a special method in which the entire dose that the person will gradually receive from inside the body over a long time (50 years, or childhood to age 70) is shown as a single exposure at the time the material was consumed. If the numerical values in mSv for internal exposure and external exposure are the same, the effects will be the same.