In Romania, DDW is obtained in two centers: the heavy water plant at Halanga, where daily is discharge as waste and in National Institute of Research and Development for Cryogenic and Isotopic Technologies of Ramnicu Valcea in a pilot plant. It is known that the DDW has a great influence on living organisms, namely in developing cells and tissues, and changes that occur in normal water features which lead to significant changes in fundamental processes of the cells (influences on the development and multiplication of cells, cellular transport, DNA synthesis and also antioxidant properties), (Somlyai et al., 1993 and Olariu et al., 2007).