[en] The general objectives of this proposal is to identify and obtain appropriate thermodynamic data on the solubilities of nickel salts and the stabilities of soluble nickel complexes which are likely to exist in the salt repository. The starting test materials would be the appropriate solid phase prepared, analyzed and characterized according to standard procedures. The crystallinity of these compounds would be checked prior and after the test measurements using x-ray technique. The aqueous phase would cover a range of ionic strengths between 0.0--5.3 M (NaCl) and the limiting solubilities would be checked as a function of time at controlled conditions of pH, Eh and temperatures. 31 refs., 4 tabs