I have worked with radiochemistry in the RIP research team of the radiochemistry laboratory since 2017, when I investigated concrete samples with the C14-PMMA porosity analysis as my Bachelor's thesis as a part of an industrial project. After this, I was hired as a laboratory and research assistant for the team. Since then I have completed my Master's thesis with the topic of radium sorption on biotite in the spring of 2020. From summer 2020 to January 2025, I worked as a PhD student in the team under the supervision of Dr. Marja Siitari-Kauppi and Prof. Gareth Law, studying the geochemical behavior of radium in the deep geological disposal of spent nuclear fuel context in a project cofunded by Posiva Oy and SKB, with contributions to the EURAD-cooperative. I successfully defended my doctoral dissertation 'Radium sorption on crystalline rock: laboratory studies and modeling interpretation' in April 2025.
In May/June 2025, I took the lead of the RIP research team, taking responsibility of the on-going industrial projects and research initiatives, such as the SAFER2028 project RACEMAT. In addition to this, I'm working in good cooperation with the EURAD2 partners and others, such as the Geological Survey of Finland (GTK), Aalto University, SKB (Sweden), Chalmers University (Sweden), University of Poitiers (France), BRGM (France), ANDRA (France), ONDRAF (Belgium), Fortum, Nagra (Switzerland), ÚJV Řež (Czechia) and Amphos21 (Spain).
I'm also an instructor in the radiochemistry laboratory courses and supervise the undergraduate and graduate students and interns of our team.
I have been a senior researcher and a leader of Radionuclides migration in the porous bedrock team at the Department of Chemistry since the year 2000. As of March 2024, I will continue as a senior expert and mentor in our team. I have 35 years of experience in the research field of spent nuclear fuel disposal. My interests are in the sorption and diffusion of safety-relevant radionuclides in the engineered and natural barriers of the radioactive waste repositories. In addition, I have developed in collaboration with the Finnish Radiation and Nuclear Safety Authority STUK a method for analyzing the porosity and pore structure of low porous materials with the C-14 PMMA autoradiography technique. This porosity investigation method has
As I completed my Ph.D. thesis within the framework of the Cotutelle agreement that granted me the Ph.D. both in Finland and in France, I have strong research connections in France. These include the Institut de Chimie des Milieux et Matériaux at Poitiers University, French Institute for Radiological Protection and Nuclear Safety and the French Geological Survey. I have been a member of the International Steering Committee for Grimsel Test Site (GTS) Phase VI since 2004 and our group has worked on the in situ projects in GTS together with an international research group managed by Nagra, Switzerland. During the years 2009-2013, we had an EU project together with Poitiers University and ERM company to transfer knowledge and build a shared laboratory for the use of the C-14 PMMA method. I have research collaborations also with Posiva, Finland, University of Jyväskylä, Finland, Geological Survey of Finland, University of Bern, Switzerland, JAEA, Japan, VTT Technical Research Centre of Finland, NRI-Rez, Czech Republic, Royal Institute of Technology, Sweden, and Technical University of Gothenburg and Geosigma, Sweden. I am also an expert member of the national CCE fission group in the Ministry of Economic Affairs and Employment in Finland. During 2019-2024 I was a mandated actor in the EURATOM EURAD consortium, leading the Finnish Research Entity team including Aalto University, the University of Jyväskylä, the University of Tampere and the Geological Survey of Finland. I continue the scientific work in our team from March 2024.
I started working in the RIP research team back in the summer of 2018, when I began my Bachelor work under Pirkko Hölttä´s supervision. After finishing my Bachelor´s Thesis, I continued to work in the team as a part-time research assistant. In 2020 I finished my Master´s Thesis while still working part time within the group and in January 2021, I began working full-time with RIP-team´s industrial projects. Later that year, I finalized my Master studies and received a grant for postgraduate studies from Fortum & Neste Foundation. Topic of my PhD research is “Radionuclide transport with colloids in fractured rock”, where I will be studying the effect of detached bentonite colloids on sorption and migration behaviour of an actinide analogue with granitic rock samples. Besides industrial projects and PhD research, I have also taken part in EURAD Hitec –project. In 2024, I am continuing my PhD as a grant researcher to finalize my thesis.
I did my M.Sc. degree in the University of Jyväskylä, getting involved in gamma-ray and charged-particle spectroscopy and their application in nuclear structure physics. I continued as a Ph.D. student in the Gamma Spectroscopy group at the Accelerator Laboratory, finally completing my thesis in experimental nuclear physics - spectroscopic studies of very neutron-deficient bismuth and astatine isotopes to be more exact. Immediately after that I spent a nice year here in the Laboratory of Radiochemistry, University of Helsinki, as a substitute for the senior laboratory engineer who was on maternity leave. After that I spent one semester as a secondary school teacher in Vantaa. That was a rather colorful experience, but both myself and all the children eventually escaped unscathed. I saw it wise to return to science however, and subsequently joined European Commission's Joint Research Centre (Geel, Belgium) performing neutron scattering experiments. At JRC Geel we collaborated widely with other European research institutes, such as IFIN-HH (Bucharest, Romania), IPHC (Strasbourg, France), HZDR (Dresden, Germany), ENEA (Frascati, Italy), and ILL (Grenoble, France). In February 2021 I joined again the University of Helsinki as a senior laboratory engineer. My work here includes technical support and development of the nuclear spectrometers and the cyclotron, as well as teaching nuclear spectrometry and related topics. I am also the radiation safety officer and the nuclear materials responsible. And finally I am extremely happy to be a member of the RIP team, being able to take part in scientific research projects.
I first started working in the RIP research team as a research assistant in 2021, participating in various research projects including sorption, diffusion, and precipitation experiments. Prior to joining the RIP group, I also worked as a research assistant in the ion exchange and radioecology research groups and completed my Bachelor’s thesis in the radiopharmacy group. In the spring of 2023, I completed my Master’s thesis, which was a collaborative study between the radioecology and radiopharmacy groups.
In 2024, I received a grant for my doctoral studies from the Fortum and Neste Foundation and began my PhD research in the autumn of 2024. The primary objective of my PhD study is to investigate the behavior of radionuclides within deep bedrock environments, specifically in the context of the final disposal of spent nuclear fuel from small modular reactors (SMRs). My research involves both experimental and modeling components. The experimental part includes sorption and diffusion studies of various radionuclides on crystalline rock and concrete samples, as well as their interfaces. Additionally, modeling is used to produce diffusion and distribution coefficients of radionuclides in different materials based on experimental results and to determine the speciation of radionuclides under prevailing conditions.
Looking ahead, I am excited to continue my research in the field of SMR waste management. SMRs represent a significant advancement in nuclear power technology, offering safer and more flexible energy solutions. By enhancing the understanding of radionuclide behavior in deep geological environments, my work aims to contribute to the development of more effective and safe nuclear waste disposal methods for SMRs. Ultimately, I hope my research will support the broader adoption of SMRs, helping to secure a cleaner and more reliable energy future.