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Vol 260
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194-211
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RUS ENG
Research article
Geotechnical Engineering and Engineering Geology

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

Authors:
Valentina A. Erzova1
Vyacheslav G. Rumynin2
Anton M. Nikulenkov3
Konstantin V. Vladimirov4
Sergei M. Sudarikov5
Mariia V. Vilkina6
About authors
  • 1 — Postgraduate Student Saint Petersburg Mining University ▪ Orcid
  • 2 — Ph.D., Dr.Sci. Director Saint Petersburg Branch of the Institute of Geoecology named after E.M.Sergeev, RAS ▪ Orcid
  • 3 — Ph.D. Leading Researcher Saint Petersburg Branch of the Institute of Geoecology named after E.M.Sergeev, RAS ▪ Orcid
  • 4 — Junior Researcher Saint Petersburg Branch of the Institute of Geoecology named after E.M.Sergeev, RAS ▪ Orcid
  • 5 — Ph.D., Dr.Sci. Professor Saint Petersburg Mining University ▪ Orcid
  • 6 — Junior Researcher Saint Petersburg Branch of the Institute of Geoecology named after E.M.Sergeev, RAS ▪ Orcid
Date submitted:
2022-01-24
Date accepted:
2022-04-26
Date published:
2023-04-25

Abstract

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

Keywords:
groundwater radioactive elements technogenic radionuclides radioactive contamination halo sorption half-life geomigration modeling
10.31897/PMI.2022.27
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Forecast of radionuclide migration in groundwater of the zone affected by construction drainage at the Leningrad NPP-2

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