DISCLAIMERThis document was pnpard as M account of work sponsored by the U n i d States Govcmmmr While this document is believed to contain coma information. natha the United States G o v a n m a t nor any agency thamf. AbstractFor the successful solution of the high-level waste (HLW) problem in Russia one must take into account such factors as the existence of the great volume of accumulated HLW, the large size and variety of geological conditions in the country, and the difficult economic conditions. The most efficient method of HLW disposal consists in the maximum use of protective capacities of the geological environment and in using inexpensive natural minerals for engineered barrier construction. In this paper, the principal trends of geological investigation directed toward the solution of HLW disposal are considered. One urgent practical aim is the selection of sites in deep wells in regions where the HLW is now held in temporary storage. The a i m of long-term investigations into HLW disposal is to evaluate geological prerequisites for regional HLW repositories.