“…In the United Kingdom we have been investigating various aspects of the chemistry of UO 2 in molten alkali metal carbonates [1][2][3][4][5][6][7][8][9][10][11]. We have also commenced a study on the removal of compounds of the fission product elements from carbonate melts, and so far have investigated Cs, Mg, Sr, Ba, lanthanides (La to Dy), Zr, Cr, Mo, Mn, Re (to simulate Tc), Fe, Ru, Ni, Cd, Bi and Te in chloride melts and the efficiency of their precipitation as phosphates.…”