"orphan source" means a sealed source, the activity level of which, at the time of its discovery, is above the exemption level referred to in Article 3(2)(a) of Directive 96/29/Euratom, and which is not under regulatory control, either because it has never been under regulatory control or because it has been abandoned, lost, misplaced, stolen or transferred, without proper notification of the competent authority, to a new holder or without informing the recipient;
"vir neznanega izvora" pomeni zaprti vir, katerega stopnja aktivnosti je v času njegovega odkritja višja od izvzete ravni iz člena 3(2)(a) Direktive 96/29/Euratom in ki ni pod pravnim nadzorom, bodisi zato, ker ni nikoli bil pod pravnim nadzorom, bodisi zato, ker je bil opuščen, izgubljen, založen, ukraden ali prenesen novemu imetniku brez ustreznega sporočila pristojnemu organu ali brez obvestila prejemniku;