Abstract: Based on the minimization principle of radioactive waste management, two treatment methods ware discussed for disused drying agents from heavy water vapor recovery system, detritiation and mixed solidification. The detritiation solution can be applied when the drying agents are rendered, to be compliance with clearance levels. Otherwise mixed solidification should be used. Preliminary test results show that high temperature heating and microwave treatment are applicable for detritiation; the mixed solidification of drying agents and boroned concentrate is feasible.

Key words: nuclear power plants, disused drying agents, detritiation, mixed solidification, clearance, volume reduction and minimization