Nuclear Substances and Radiation Devices Regulations

7 A person may, without a licence to carry on that activity, possess, transfer, use or abandon a tritium-activated self-luminous safety sign if

• (a) the only nuclear substance contained in the safety sign is tritium;

• (b) the safety sign contains no more than 925 GBq of tritium in gaseous form;

• (c) the light-emitting component containing the tritium consists of glass tubes that are enclosed in a sturdy metal or plastic frame mounted in a manner that prevents the dismantlement and removal of the glass tubes;

• (d) the amount of tritium present in the form of oxide does not exceed 1 per cent per volume for each glass tube;

• (e) the safety sign conforms to ANSI/HPS N43.4-2000, Classification of Radioactive Self-Luminous Light Sources, of the American National Standards Institute/Health Physics Society, or to Standard MIL-STD-810F, 2000, Department of Defense Test Method Standard for Environmental Engineering Considerations and Laboratory Tests, of the United States Department of Defense; and

• (f) the safety sign, if it is manufactured after the coming into force of this paragraph, is marked with the name and quantity in becquerels of the nuclear substance, the manufacturer’s recommended expiry date for the sign and the date of manufacture of the sign.