Spectrometry characteristics of photon fields and atmospheric radionuclide deposits monitoring in one part of Southern Bohemia

摘要

The (bio)Tnonitoring in the neighborhood of Nuclear Power Plant (NPP) Temelin started in the year 2000-1 year before the initial power plant operation. In the years 2000, 2002, and 2004, the spectrometry characteristics of photon-spectra measurement were included in biomonitoring. The area of interest contained 29 sampled locations along eight radial profiles intersecting the area at distances from 2 to 20 km around Temelin NPP. Laboratory, as well as in situ, gamma spectrometric method enables to determine presence of natural and manmade radionuclides with very good limits of detection. In situ gamma spectrometry consists of direct air kerma rate measurements and air kerma rate calculations from photon-spectra measurement. The laboratory gamma spectrometric measurement (geometry of Marinelli containers) is used for the determination of radionuclides in the samples of pine bark, Shreber's moss, forest humus, edible mushrooms, and forest berries. The trend analysis of measurement results enables the completion of the main task of this project: to describe the influence of NPP Temelin on the radiation increase in its neighborhood. Only ~(137)Cs of manmade radionuclides has been identified.