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.

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Sealed Source

With respect to Radiation Protection, a sealed source is a source of Ionising Radiation in the form of Radioactive material which is encapsulated. Sealed radioactive material can not escape and will not cause a Contamination hazard. Sealed sources are used in irradiators (food, products, blood), and thickness & level gauges. The activity of the sealed source can vary from a few Bq to many 10's of TBq. See Closed Source for additional definitions and Unsealed Source for the alternative type of source. Also see HASS sources.

Two things are infinite: the universe and human stupidity; and I'm not sure about the universe

– Albert Einstein