Fission product waste management, aqueous

In the field of radioactive waste management, the hazardous material consists to a large extent of actinides and fission and activation products from nuclear reactors (such is the case of the fission product Se). The scientific literature on thermodynamic data, mainly on equilibrium constants and redox potentials in aqueous solution, has been contradictory in a number of cases. A critical and comprehensive review of the available literature is necessary in order to establish a reliable thermochemical database that fulfils the requirements of a proper modelling of the behaviour of the actinide and fission and activation products in the environment. 

Residual quantities of minor actinides and fission products that are removed from the purification parts of the cycle are usually reduced in volume and then combined in the aqueous raffinate HLW stream. The cladding hulls are managed as high-level solid waste by packaging them in drums and storing the drums in a dry disposal site. 

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