ON NUMERICAL PETROPHYSICАL EVALUATION OF GRANITOIDS OF AREA NEAR THE SOUTH-UKRAINIAN NUCLEAR POWER PLANT WITH THE DETERMINATION OF THE POSSIBILITY OF USING ITS FOR THE DISPOSAL OF RADIOACTIVE WASTE

The most important task of modern nuclear power engineering is a safe disposal of the radioactive wastes. The various approaches have been used in developing the basic justification of choice of disposal geological environment. It was revealed that a deep repository of the radioactive wastes is suitable approach for this goal. it has substantial advantages in comparison with the surface warehousing. Acarefully chosen geological environment would form a safe casing for the repository engineered barrier system, protecting it from many natural and artificial hazards. At present several developed countries have considered locating deep repositories in crystalline rock. Repository depths between about 500?1000 m are usually considered. However, a approach of deep geological repository is connected with the problem of searching of suitable geological sites and investigation a lot of characteristics of the host rock. It is thus importantto consider the potential use of the special petrophysical researches in assessment studies. These petrophysical characteristics would need more in-depth analysis of the insulating properties of the host rocks. On the basis of our researches carry out the simulation of some petrophysical characteristics and permeability of the leadingpetrotypes of Ingulsk and Dniester-Buh megablocks of Ukrainian Shield by statistical techniques, including correlation and factorsanalyses. It gave a possibility to implement of numerical classification of the all researched objects (totally 27 petrotypes). Results of analyses are also used to make predictions about the function indicators as a tool for selection of the host rocks. Finally only Oleksandrivs'k enderbites and Kirovohrad granites were chosen as the most acceptable natural objects for the radioactive wastesdisposal. Also Oleksandrivsk enderbites are not far to SUNPP that means low transport costs and environmental safety. Kirovohrad granites should be chosen as the host rocks as to creation of underground laboratory of priority comprehensive researches ofinsulation properties of geological environmental.