Spatial distribution investigation of radioactivity of potable waters in Luxembourg

A survey of naturally occurring radio-nuclides was performed on the territory of Luxembourg in order to identify the main physical and chemical parameters in drinking waters. During last summer water samples from 316 different outflows were collected twice and analyzed. A routine laboratory sequentional extraction radiochemistry procedure was applied for monitoring low concentrations of radio-nuclides in natural waters. New investigations were done to optimize some analysis conditions for the different determination procedures. A quality assurance procedure was applied. The obtained results are analyzed in term of spatial distribution, supported geology and chemistry. (author)