29 October 2017 to 3 November 2017
Australia/Sydney timezone

Digital autoradiography on C-14 labelled PMMA impregnated rock samples using the Beaver$^{TM}$

2 Nov 2017, 11:45
Oral Presentation National and international collaborative waste management programs Radionclide solubility, speciation, sorption & migration


Dr Mikko Voutilainen (Department of Chemistry, University of Helsinki, Finland)


In Finland and Sweden KBS-3 concept has been chosen for disposal of spent nuclear fuel in crystalline rock. Recent transport experiments have shown that heterogeneity of rock may play a major role in transport of radionuclides. Autoradiographic methods has been proven to be able to assist the characterization of heterogeneous structures. In this study we tested a novel digital autoradiographic device called Beaver$^{TM}$ which applies a Micro Patterned Gaseous Detector in order to quantitatively map beta emissions by C-14 atoms. The studied samples were impregnated with C-14 labelled MMA (Methyl MethAcrylate) and polymerized to PMMA using heat. The Beaver$^{TM}$ was then used to determine concentration of C-14 atoms which can then be converted to porosity based on the amount of C-14 intruded into the rock sample. The resulting images show a heterogeneous distribution of porosity which arises from the different porosities of minerals. The samples were chosen from three sites that has been used recently in *in situ* diffusion experiments: Olkiluoto (Finland), Äspö (Sweden) and Grimsel (Switzerland).

Primary author

Dr Mikko Voutilainen (Department of Chemistry, University of Helsinki, Finland)


Mr Juuso Sammaljärvi (Department of Chemsistry, University of Helsinki, Finland) Jérôme Donnard (AI4R SAS, Nantes, France) Dr Marja Siitari-Kauppi (Department of Chemistry, University of Helsinki, Finland) Samuel Duval (AI4R SAS, Nantes, France)

Presentation Materials

Your browser is out of date!

Update your browser to view this website correctly. Update my browser now