The International Atomic Energy Agency (IAEA) and the International Organization for Standardization (ISO) has introduced a new symbol to help reduce death and injury from accidental exposure to large radioactive sources. It will serve as a supplemental warning to the current ‘trefoil’, which has no intuitive meaning and little recognition beyond those educated in its significance.

According to tests, red appears to be a universally alarming color. The hope is people will see the symbol and run away. Scavengers, coming upon a radiant source, might otherwise remove protective sheilding, exposing themselves and others.

“I believe the international recognition of the specific expertise of both organizations will ensure that the new standard will be accepted and applied by governments and industry to improve the safety of nuclear applications, protection of people and the environment,” said Ms. Eliana Amaral, Director, Division of Radiation, Transport and Waste Safety, IAEA.