What is the radiation sign?

An officially prescribed magenta or black trefoil on a yellow background, which must be displayed where certain quantities of radioactive materials are present or where certain doses of radiation could be received.

What is the purpose of a radiation sign?

An international symbol used to indicate radioactive sources, containers for radioactive materials, and areas where radioactive materials are stored and used.

What is the color of radiation signage?

Purple
Purple – used for radiation hazards. It may contain a combination of purple and yellow. Black & White – or a combination of the two are used to designate traffic and housekeeping markings.

Where would you find a radiation sign?

A radiation symbol sits inside the triangle with additional text below. When the radiation hazard is considered to be life-threatening, a Danger Sign must be used. A Danger Sign has the word ‘DANGER’ in white letters on a red oval inside a black background.

What signs are posted when radiation may be in use?

Airborne radioactivity areas must be posted with a sign(s) bearing the radiation symbol and the words: “Caution/Danger Radioactivity Area” and “Access To Authorized Personnel Only”.

When should the radiation hazard symbol be used?

The IAEA has recommended that the symbol be used on IAEA category 1, 2 and 3 sealed radiation sources (danger- ous sources that can cause death or serious injury).

Which sign is used to alert associates of provide protection from exposure to radioactive materials?

trefoil symbol
The standard radiation symbol appears with the required trefoil symbol as shown below. The symbol is magenta, purple, or black on a yellow background.

What signs and labels are required on all radiographic exposure devices?

These areas must have a sign(s) bearing the radiation symbol and any one or a combination of the following warnings:

  • Caution/Danger Radioactive Material‑Admittance to Authorized Personnel Only.
  • Caution/Danger High Radiation Area.
  • Caution/Danger High Radiation Area‑ Admittance to Authorized Personnel Only.