Forecast of radionuclide migration in groundwater of the zone affected by construction drainage at the Leningrad NPP-2

The distribution of natural (at the level global background) and technogenic radionuclides in groundwater industrial zone Sosnovy Bor town, where several nuclear power facilities are operating, was analyzed. main recorded samples cesium (137Cs), strontium (90Sr), tritium isotopes. first two aquifers from surface subject to contamination: Quaternary upper Lomonosov aquifer. Based on extensive material engineering geological studies work area, a 3D model hydrodynamic geomigration models were constructed. By means modeling, extent nature changes hydrogeological conditions area resulting construction operational drainage new stage Leningrad Nuclear Power Plant (LNPP-2) determined. “historical” halo radioactive contamination forming (1970-1990) at site adjacent NPP, storage facility low- medium-level waste is located, falls into influence. Interpretation monitoring data allowed obtaining migration parameters for predictive estimates. Modeling has shown that during time LNPP-2 operation there no intake contaminated water by system plant.