Mapping Radionuclide Distribution In Surface Sediments Using GIS And An underwater HPGe Detector

摘要

Gamma-emitting radionuclides in the surface sediments of L Lake were examined in situ with an underwater High Purity Germanium (HPGe) detector and further studied by retrieving various sediment samples for analysis by HPGe gamma spectrometry. The predominant man-made radionuclide detected was cesium-137. These measurements were part of a four phase strategy for characterizing L Lake contaminants. The radionuclide distribution data provided by these studies can be directly compared to baseline gamma surveys done in 1985 prior to the lake's completion. All available data were carefully considered in the preparation of an Environmental Impact Statement (EIS) that evaluates the consequences of discontinuing river water pumping to the man-made cooling water reservoirs at the Savannah RIver Site.