Orphan Source meaning

In radiation regulation, an orphan source is a radioactive source found outside regulatory control — for example, because it has never been regulated, or has been lost, stolen, abandoned, misplaced or transferred without proper authorisation. The term is defined in the EU Basic Safety Standards (2013/59/Euratom) and carried through into UK and Irish implementing legislation (including IRR17, IRR(NI) 2017 and Ireland’s 2019 ionising radiation regulations), with broadly consistent usage across England & Wales, Scotland, Northern Ireland and Ireland. Key legal features are that the source is not under the regulatory control of a licensee or other authorised person, and its discovery triggers immediate duties to notify the competent authority, secure the area, and arrange recovery and disposal by an authorised undertaking. Competent authorities include HSE (or ONR on nuclear sites) and the environmental regulators (EA, SEPA, NRW, NIEA) in the UK, and the EPA (Office of Radiological Protection) in Ireland. Orphan sources commonly arise in scrap metal and waste streams, decommissioning, laboratories and industrial radiography. Possession or use without a licence/permit is an offence; regulators may take enforcement action and recover costs. Contracts and compliance systems should address source accountancy, transfer controls and orphan-source response.