Abstract: There are currently four VVER nuclear power units and two improved M310 nuclear power units in the Tianwan Nuclear Power Plant. To reduce the final amount of solid waste package for disposal so to meet the waste minimization management objective, a radwaste treatment center was constructed and shared by the above six units in addition to taking measures to control the generation of radioactive wastes from sources. The radwastes are treated by drying, super-compaction and grouting process, together with adopting high integrity containers of concrete. Ascribing to the above measures, the waste volume to be disposed from one unit does not exceed 50 m³ each year under the precondition that the waste packages meet the requirements for near surface disposal. This waste treatment strategy brings good economic and social benefits, so can be used as a reference to waste minimization for nuclear power stations with multiple reactor units.

Key words: Tianwan Nuclear Power Plant, waste treatment center, waste minimization