Glossary

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Unsealed Source

With respect to Radiation Protection, an unsealed source is is a source of Ionising Radiation in the form of Radioactive material which is not encapsulated or otherwise contained. The implication is that unsealed radioactive material can move around and if uncontrolled would lead to Contamination. It should be noted that unsealed sources are used extensively in biological research and medicine. See Open Source for a related definition, and Sealed or Closed Source for alternative types.

Physics is really nothing more than a search for ultimate simplicity, but so far all we have is a kind of elegant messiness

– Bill Bryson