sealed source
as defined in Council Directive 2013/59/Euratom of 5 December 2013 laying down basic safety…, Article 4, point (90) (Definitions)
(90)
"sealed source" means a radioactive source in which the radioactive material is permanently sealed in a capsule or incorporated in a solid form with the objective of preventing, under normal conditions of use, any dispersion of radioactive substances;
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Also defined in
- Proposal for a COUNCIL DIRECTIVE laying down basic safety standards for protection against the dangers arising from… 52011PC0593, Article 4, point (137)
a radioactive source in which the radioactive material is permanently sealed in a capsule or closely bonded in a solid form