Combined, sequential procedure for determination of .sup.137Cs, .sup.40K, .sup.63Ni, .sup.90Sr, .sup.230,232Th, .sup.234,238U, .sup.237Np, .sup.238,239+240Pu and .sup.241Am applied for study on contamination of soils near Zarnowiec Lake

The paper summarizes results of investigation of the current state of radioactive contamination on site being under consideration for planned nuclear power plant in northern Poland. Thanks to use of sequential procedure it was possible to determine activity concentrations for radioisotopes of nine elements, both natural and artificial. Results show that observed levels of radioactive contamination are rather typical for central Europe and global fallout is dominant factor of presence of artificial radionuclides. The total deposition for artificial radionuclides revealed maxima equal to 1747 ± 121 Bq/m.sup.2 for .sup.137Cs, 3854 ± 158 Bq/m.sup.2 for .sup.90Sr, 101 ± 23 mBq/m.sup.2 for .sup.237Np, 57.7 ± 6.0 Bq/m.sup.2 for .sup.241Am, 3.27 ± 0.80 Bq/m.sup.2 for .sup.238Pu and 68.5 ± 5.0 Bq/m.sup.2 for .sup.239+240Pu.