Procedure testing sealed sources for leakage v5.pdf
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… with the current legislation and the ‘Randwyck Regulations’. This procedure is supplementary to the procedure: ‘Directions for sealed sources’. SEALED SOURCES: LEAKAGE TEST A sealed source is a radioactive component that is either embedded in or adhered to a solid carrier material, or enclosed by a different material. It is understood that either the carrier material or the material enclosing the radioactive substance offers adequate resistance to spreading of radioactive substances, when used under regular circumstances. Submitting sealed sources to an inspection is obligatory; this is performed when receiving the source, as well as periodically, meaning at least once a year. Lastly, when a sealed source is definitively not used … 1 MBq in activity (or less than 0.02 Reinh), nor if the sealed source contains a gaseous radioactive substance. The test for leakage is obliged for all sealed sources from the age of 15 years, even if their activity at that time is less than 1 MBq. There is a risk of porosity or degradation of the carrier material, resulting in leakage. According to legislation, a sealed source is considered leaking, if a wiped activity of more than 185 Bq (Becquerel) is determined. 1 ANVS regulations on basic …