{
  "url": "https://openlegislation.uk/ionising-radiations-regulations-northern-ireland-2017/schedule-1/paragraph-1",
  "json_url": "https://openlegislation.uk/ionising-radiations-regulations-northern-ireland-2017/schedule-1/paragraph-1.json",
  "legislation": "nisr/2017/229",
  "legislation_title": "The Ionising Radiations Regulations (Northern Ireland) 2017",
  "legislation_url": "https://openlegislation.uk/ionising-radiations-regulations-northern-ireland-2017",
  "path": "schedule/1/paragraph/1",
  "kind": "paragraph",
  "number": "1",
  "heading": null,
  "text": "Work with ionising radiation is not required to be notified in accordance with regulation 5 when the only such work being carried out is in one or more of the following categories—\n(a) where the concentration of activity per unit mass of a radioactive substance does not exceed the concentration specified in column 2 of Part 1 of Schedule 7 (for artificial radionuclides and naturally occurring radionuclides which are processed for their radioactive, fissile or fertile properties) or column 2 of Part 2 of Schedule 7 (for naturally occurring radionuclides which are not processed for their radioactive, fissile or fertile properties);\n(b) where the quantity of radioactive substance involved does not exceed the quantity specified in column 3 of Part 1 of Schedule 7 (for artificial radionuclides and naturally occurring radionuclides which are processed for their radioactive, fissile or fertile properties) or column 3 of Part 2 of Schedule 7 (for naturally occurring radionuclides which are not processed for their radioactive, fissile or fertile properties);\n(c) where the concentration of activity per unit mass or quantity of a radioactive substance does not exceed values which may be approved by the Executive for specific types of work and where such work satisfies the exemption criteria set out in paragraphs 2 and 3 below;\n(d) where apparatus contains radioactive substances in a quantity exceeding the values specified in sub-paragraphs (a) and (b) provided that—\n(i) the apparatus is of a type approved—\n(aa) by the Executive; or\n(bb) by the Great Britain Executive in accordance with paragraph 1(d) of Schedule 1 to the Great Britain Regulations;\n(ii) the apparatus is constructed in the form of a sealed source;\n(iii) the apparatus does not under normal operating conditions cause a dose rate of more that 1 µSvh-1 at a distance of 0.1m from any accessible surface; and\n(iv) conditions for the disposal of the apparatus have been specified by the chief inspector;\n(e) the operation of any electrical apparatus to which these Regulations apply other than apparatus referred to in sub-paragraph (f) provided that—\n(i) the apparatus is of a type approved—\n(aa) by the Executive; or\n(bb) by the Great Britain Executive in accordance with paragraph 1(e) of Schedule 1 to the Great Britain Regulations; and\n(ii) the apparatus does not under normal operating conditions cause a dose rate of more than 1 µSvh-1 at a distance of 0.1m from any accessible surface;\n(f) the operation of—\n(i) any cathode ray tube intended for the display of visual images; or\n(ii) any other electrical apparatus operating at a potential difference not exceeding 30kV,\nprovided that the operation of the tube or apparatus does not under normal operating conditions cause a dose rate of more than 1 µSvh-1 at a distance of 0.1m from any accessible surface; or\n(g) where the work involves contaminated material resulting from authorised releases which the chief inspector has declared not to be subject to further control.",
  "extent": null,
  "status": null,
  "version": "current",
  "annotations": [],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/nisr/2017/229/schedule/1/paragraph/1",
    "retrieved_at": "2026-10-29T00:50:47.956078+00:00"
  },
  "licence": "Open Government Licence v3.0",
  "licence_url": "https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/",
  "attribution": "Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives."
}