Activity: Talk or presentation types › Invited talk
In many countries radioactive waste legacies from their civil (and military) nuclear programs. Several engineering options are under investigation, such as the geological disposal of radioactive wastes and enhancing the stability of legacy waste trenches. To inform on the safety case of such engineering options, a thorough understanding of the geochemical processes influence the fate and mobility of radionuclides of interest (e.g. U, Np, Pu, Sr, Cs), and how these processes are affected by any potential engineering scenario. During this presentation I will discuss two case studies: (1) the interaction of actinides with magnetite (Fe3O4), a common corrosion product during the lifetime of a geological disposal facility; and (2) the effects of using colloidal silica based grouts for enhancing legacy radioactive wastes at the Little Forest Legacy Site on the mobility and fate of Sr and Cs.