Number of radiation sources being regulated by the RSNSA during the period July 2018 to June 2019 Blank Cells : Not Applicable Sealed Source: means a radioactive source in which the radioactive material is – (a) permanently sealed in a capsule; or (b) closely bonded and is in a solid form. Radioactive Source: means any radiation source containing radioactive material. Radioactive Material: means any material containing one or more radionuclides and which emits radiation. Radiation Generator: means a device capable of generating radiation such as x-rays, neutrons, electrons or other charged particles. Frequency of upload: Biannual Source: Radiation Safety and Nuclear Security Authority Converted to CSV and Published by Central Information Systems Division