Radiation Protection Glossary

A radiation protection glossary for Radiation Protection Supervisors (RPS) and anyone interesting in radiation safety terminology. The glossary is a mixture of health physics terms, and phrases related to radiation legislation, transport, practical safety and similar.

Search the Glossary by either clicking on a letter or typing a Keyword into the search box.


Justification is one of the first three principles of the ICRP system of radiological protection. Justification, together with Optimisation and Limitation, are used as the basis of Radiation Protection internationally. Justification is defined in the ICRP 123 publication as 'no practice involving exposures to radiation should be adopted unless it produces sufficient benefit to the exposed individual or to society to offset the Detriment it causes'.

What's the matter? What's the antimatter? Does it antimatter?

– Wes Nisker