Paragraph 10 Leaching and volumetric leakage assessment methods
For specimens which comprise or simulate radioactive material enclosed in a sealed capsule, either a leaching assessment or a volumetric leakage assessment shall be performed as follows:
the leaching assessment shall consist of the following steps:
The specimen shall be immersed in water at ambient temperature. The water shall have an initial pH of 6–8 with a maximum conductivity of 1 mS/m at 20°C.
The water and specimen shall be heated to a temperature of (50±5)°C and maintained at this temperature for 4 hours.
The activity of the water shall then be determined.
The specimen shall then be stored for at least 7 days in still air at a temperature not less than 30°C.
The process in (i), (ii) and (iii) shall be repeated.
The alternative volumetric leakage assessment shall comprise any of the tests prescribed in the ISO leak test document which are acceptable to the Secretary of State.