AbstractThree sets of scoping tests have been conducted regarding the compatibility of steels (316, 316L, EbriteR and A106), nickel (Ni-200), and other metals (tungsten, beryllium and lead) to 1–5 molal LiOH and 18 molal LiNO3 solutions at temperatures of 60–100°C. These tests have considered general weight loss, pitting, stress-corrosion cracking, selective alloy leaching, base and weld metal differences, and the influence of chloride.