Low level radioactive waste (condensate, regenerant and detergent) is first subjected to electrodialysis for concentration of radioactive cations into very small volume and thus converting major portion of the waste into a dischargeable environment friendly waste. Volume reduction factor of similar to 10 is achieved. The concentrated waste generated during electrodialysis is then used as feed for electrochemical ion concentrator to concentrate radioactive cations further into very small volume. A volume reduction factor of 35-40 is achieved in this processs. Thus the use of electrodialyser coupled with electrochemical ion concentrator gives a total volume reduction factor of about 350-400. Pilot plant scale study has been successfully completed.