The three fundamental rules of protection against all sources of radiation are:.

These radiological protection measures can be compared to those taken against ultraviolet rays: use of a sunscreen that acts as a protective screen and limitation of exposure to the Sun.

There are two types of screen or shielding:

Primary barriers: attenuate the radiation of the primary beam.

Secondary barriers: prevent scattered radiation.

For radioactive sources that emit radiation, two additional recommendations should be added:

For example, nuclear facilities are not dismantled immediately after they are stopped, to wait for a decrease in radiological activity in the affected areas. In underground uranium mines, highly effective ventilation maintains a low concentration of radon in the air miners breathe.

Workers who may reach dose levels close to legal limits due to ionizing radiation in their work (nuclear industries, doctors, radiologists...) usually wear dosimeters that measure the amount of radiation to which they have been subjected. These devices make it possible to ensure that the person has received a dose lower than that legally dictated, or in the event of a radiological accident), to know the extent of the dose received.

Awareness of the potential danger of excessive exposure to ionizing radiation led authorities to set regulatory standards for dose limits. These limits correspond to an acceptable additional risk with respect to the natural risk.

The legal regulations for radiological protection today use:

It is used only when there is a reason for biological risk (use of trisector).

Zone qualification:.

The dissemination that promotes the necessary knowledge, at each level and instance, through a dissemination based on the aforementioned principles, can make protection measures a shared responsibility.[1]​.

The three fundamental rules of protection against all sources of radiation are:.

These radiological protection measures can be compared to those taken against ultraviolet rays: use of a sunscreen that acts as a protective screen and limitation of exposure to the Sun.

There are two types of screen or shielding:

Primary barriers: attenuate the radiation of the primary beam.

Secondary barriers: prevent scattered radiation.

For radioactive sources that emit radiation, two additional recommendations should be added:

For example, nuclear facilities are not dismantled immediately after they are stopped, to wait for a decrease in radiological activity in the affected areas. In underground uranium mines, highly effective ventilation maintains a low concentration of radon in the air miners breathe.

Workers who may reach dose levels close to legal limits due to ionizing radiation in their work (nuclear industries, doctors, radiologists...) usually wear dosimeters that measure the amount of radiation to which they have been subjected. These devices make it possible to ensure that the person has received a dose lower than that legally dictated, or in the event of a radiological accident), to know the extent of the dose received.

Awareness of the potential danger of excessive exposure to ionizing radiation led authorities to set regulatory standards for dose limits. These limits correspond to an acceptable additional risk with respect to the natural risk.

The legal regulations for radiological protection today use: