Alum shale is an acid-producing type of rock that can be encountered in mining and construction work in Northern Europe. Such shales can have high levels of naturally occuring radioactive material (NORM) and stable trace elements ("heavy metals"). In her project, Frøydis Meen Wærsted performed leaching experiments to investigate how different storage conditions of the excavated rock would impact the mobility of NORM and stable trace elements.
Frøydis Meen Wærsted has successfully defended her PhD thesis "Mobility of naturally occurring radionuclides and stable elements in alum shale: A case study of Gran, Highway 4, Norway" September 28th 2019. the title of her trial lecture was "The role of organic material in migration and transport of radioisotopes - coupling of microbiology and radioisotopes".
First opponent: Dr. Per Roos, Center for Nuclear Technologies, Technical University of Denmark
Second opponent: Dr. Nathalie Impens, Belgian Nuclear Research Institute (SCK-CEN)
Committee coordinator: Dr. Mona Henriksen, NMBU
Main supervisor: Professor Lindis Skipperud, NMBU
Professor Brit Salbu, NMBU
Dr. Justin Brown, Norwegian Radiation and Nuclear Safety Authority
Juan Carlos Mora Canãdas, Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), Spain