# The Ionising Radiations Regulations (Northern Ireland) 2017, Paragraph 1


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—
(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);
(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);
(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;
(d) where apparatus contains radioactive substances in a quantity exceeding the values specified in sub-paragraphs (a) and (b) provided that—
(i) the apparatus is of a type approved—
(aa) by the Executive; or
(bb) by the Great Britain Executive in accordance with paragraph 1(d) of Schedule 1 to the Great Britain Regulations;
(ii) the apparatus is constructed in the form of a sealed source;
(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
(iv) conditions for the disposal of the apparatus have been specified by the chief inspector;
(e) the operation of any electrical apparatus to which these Regulations apply other than apparatus referred to in sub-paragraph (f) provided that—
(i) the apparatus is of a type approved—
(aa) by the Executive; or
(bb) by the Great Britain Executive in accordance with paragraph 1(e) of Schedule 1 to the Great Britain Regulations; and
(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;
(f) the operation of—
(i) any cathode ray tube intended for the display of visual images; or
(ii) any other electrical apparatus operating at a potential difference not exceeding 30kV,
provided 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
(g) where the work involves contaminated material resulting from authorised releases which the chief inspector has declared not to be subject to further control.

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Source: https://www.legislation.gov.uk/nisr/2017/229/schedule/1/paragraph/1 (the official version)
Page: https://openlegislation.uk/ionising-radiations-regulations-northern-ireland-2017/schedule-1/paragraph-1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.