You will need this registration to operate premises that manufactures, uses or stores a radioactive substance.
A radioactive substance is any article that has been manufactured or subjected to any artificial treatment or process that contains more than the maximum prescribed concentration of any radioactive element.
All non-exempt radioactive substances and the premises where those substances are manufactured, used, stored or otherwise dealt with (including dealing with radioactive waste) must be registered. However, premises do not have to be registered if the radioactive substance is only stored there for less than 24 hours in transit between two other locations.