Page 364 - Radiation Safety

PROCEDURE OF RW MANAGEMENT

❑ Treatment method based on the nature of waste

1. Airborne (gaseous form)
▪ This waste normally generated in contained, ventilated enclosures or building and discharged to the

atmosphere using the ventilation system
▪ Filtration, absorption and cryogenic/compression might be used as treatment methods.
▪ High efficiency filters in the extract line remove most of the particulate matter

▪ Beds of activated charcoal granules can be used for removal of some vapour such as radioiodine
▪ Kr-85 with long half-life may be compressed into liquid form.

2. Liquid waste
▪ The methods for treatment liquid waste are ion-exchange, chemical precipitation, evaporation,

reverse osmosis, ultra-filtration, electrochemical, solvent extraction etc.
▪ Some of the process such as evaporation method will change the liquid waste into solid waste.

3. Solid waste
▪ The treatment methods that can be used for solid waste are mechanical (compaction), thermal

(incineration, pyrolysis), metal melting and sintering, chemical (acid digestion), biochemical and
photo-oxidation decomposition