Gaseous wastes from reactor buildings are filtered using pre-filters and high-efficiency particulate air filters and released after monitoring through a stack. The release rate and integrated releases of different radionuclides are monitored and accounted for to demonstrate that the releases are within the prescribed limits. Similarly, the radioactive liquid wastes are also segregated, filtered and conditioned as per procedure and after adequate dilution (so as to comply with the limits of discharges) disposed to the water body. The activity discharged is monitored at the point of discharge and accounted on a daily basis. The radioactive solid wastes are disposed off on-site in brick-lined underground trenches, re-enforced cement concrete (RCC) vaults or tile holes, depending on the radioactivity content and the radiation levels.
AERB has prescribed limits on the annual volume and activity of discharge, daily discharges and activity concentration from each NPP, which are site-specific. The performance of the radioactive waste management system established at NPPs is reviewed to ensure that appropriate methods and management practices continue to be in place and the generation of radioactive waste is kept to as minimum as practicable in terms of activity and volume.