Radiocarbon Dating of Groundwater in the Vicinity of a Potential Repository in Clay for Radioactive Waste Disposal. Final Report for the Period 1 December 1982-30 November 1984

摘要

In the context of a study of Boom clay in Mol (Belgium) for the purpose of storing radioactive waste, sup 14 C activity measurements of the surrounding aquifers have been carried on in the Kempen region to investigate their flow patterns. This work is done in conjunction with classical hydrogeological methods, and a mathematical modelling of the aquifer system. Radiochemical dating is believed to give a decisive support to the hydrogeological modelling approaches. 43 wells in 11 locations have been sampled for sup 14 C isotopic and chemical analyses. So far 34 sup 14 C and 23 sup 13 C/ sup 12 C isotopic ratios are available. Preliminary results are presented. The decreasing trend in sup 14 C activity with depth from Neogene to older layers is generally observed. The sup 14 C activities of the Berg sands in general are discussed. The sup 14 C data compared to the piezometric measurements cannot be explained without taking into account a contribution through seepage from one or more other aquifers. A positive sup 14 C measurement in the interstitial water of the Boom clay confirms this view. This work will be pursued as many more data are needed to reach any quantitative conclusion. (Atomindex citation 16:066758)