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It is important to understand the movement behavior of water and radionuclide migration through soil formation (saturated and unsaturated zone) which is expected as one of the engineered barriers and also natural barrier, for the safety evaluation of final storage and disposal of low level radioactive wastes come from nuclear power plants. The barrier performance tests of the soil were carried out in concrete pits as a part of 'Safety demonstration test of engineered barrier system'. One of the tests was carried out in the concrete pit B-1 by suppling radioactive solution on the surface of the backfill soil, the other was in the pit B-2 in which the simulated solidified wastes were burried in the backfill soil. A water, equivalent amount of rainfall was sprinkled for two years over the backfill soil in the concrete pits. Based on the experimental results, water movement and radionuclide migration through backfill soil were analysed. Method of the analysis and the analyzed results as well as the experimental results were described in the report. Euler-Lagrange method described in the report was confirmed to be effective simulation method for the migration of (sup 137)Cs, (sup 90)Sr and (sup 60)Co through the backfill soil. (author). (ERA citation 15:021492)