Nuvia (UK) has won a “multi-million-pound” contract from Dounreay Site Restoration Limited (DSRL) to design, procure, install and commission plant and equipment to remove the residual sodium-potassium (NaK) remaining in the Dounreay Fast Reactor’s (DFR) piping network. The DFR started operating in 1959 using sodium-potassium coolant. Nuvia said today that the NaK is to be removed using an existing Water Vapour Nitrogen process – “essentially steam” – that will react with the residue, producing sodium hydroxide, potassium hydroxide and hydrogen. The resultant products will be collected and processed using existing gas filtration systems and the existing Ion Exchange Plant to make them safe for disposal, the company said.
World Nuclear News 29th Aug 2018 read more »