Proceedings

Tuesday, October 21, 2025
Opening Plenary Session
Harri Varjonen, Chair of the SYP2025 organizing committee
Opening of SYP2025
Sakari Puisto, Minister of Economic Affairs
Opening words
Carl Berglöf, Ministry of Climate and Enterprise, Sweden
Preparations for New Nuclear Power in Sweden
Kim Dahlbacka, Westinghouse
New Nuclear Energy in Nordics – Repeating the success story from the seventies
Jussi Heinonen, STUK
Legislative Reform and Its Effects on Nuclear Energy in Finland
Plenary Session
Petra Lundström, Fortum
Nuclear Future Outlook and Fortum
Veli-Pekka Nurmi, TVO
Nuclear safety and overall safety for a nuclear operator under current safety conditions 
Philip von Segebaden and Katherine Dunne, Novatron Fusion Group
Novatron Fusion Group - in preparation for industrialization of fusion energy
Antti Hakola, Vice Chair of Finnish Nuclear Society
Awarding the Pekka Jauho prize 2025
SMR and Gen IV
Paula Keto, VTT
Lessons Learned from SAFER2028 SMR Siting and Waste Management Project (SMRSiMa)
Sami Naumer (VTT): 
Characterisation and Transport Modelling of Spent Nuclear Fuel from LWR SMRs
- Paper
- Presentation
Timothy Schatz (VTT): 
Small and Advanced Modular Reactor Waste Generation and Management in EURAD-2 WP4 FORSAFF
Pyry-Pekka Koistinen (Fortum): 
Operational Maturity of GEN IV Reactor Designs
Jenna Järvenpää (VTT): 
Comparison of Gaussian Plume models for SMRs in urban areas
Jyri Rökman (VTT): 
Strategic Optionality and Flexibility in SMR Investments for Process Industry, District Heating, and Data Centers: A Scenario and Real Options Approach
Nuclear Fusion Technology
Tomas Lindén (Helsinki Institute of Physics): 
An overview of recent fusion developments
Samuli Saari (VTT): 
ERO2.0 modelling of divertor marker erosion in ASDEX Upgrade L-mode experiments
Aaro Järvinen (VTT): 
Accelerating Fusion Science and Technology Development with AI
Karoliina Salminen (VTT): 
DEMO breeding blanket remote maintenance concepts and challenges
Changyang Li (LUT University): 
Remote Maintenance Strategies and Equipment for DEMO Port Systems
Markus Airila (VTT): 
Nordic site selection pre-study for Novatron 3 fusion demonstration facility
Nuclear Fuel and Reactor Materials
Michael Lewis (Westinghouse): 
Performance of Fuel Technology on AP1000™ Reactors
Björn Andersson (Westinghouse): 
TRITON11 fuel performance evaluation
Jan Höglund (Westinghouse): 
Westinghouse VVER-440 design upgrade
Innovative Solutions and Future Technologies
Antti Räty (VTT): 
Applying digital twins and ontology for robot assisted decommissioning operations (Euratom project DORADO)
Pyry Aho (Fortum): 
Utilizing Large Language Models to Improve Requirements Tracing in the Nuclear Energy Domain
- Paper
Björn Andersson (Westinghouse): 
Westinghouse AI application for visual inspections
Thor Lindberg (AFRY Sweden): 
Novel features of the AFRY Intelligent Scenario Modelling (AISM) tool including PSA studies and sensitivity calculations of radionuclide transport and doses
Wednesday, October 22, 2025
Plenary Session
Mika Finska, Business Finland
Nuclear IPCEI meaning for Finland
Johanna Hansen, R&D Coordinator, Posiva
Commissioning phase of the world’s first SNF repository in Olkiluoto
Hannu Tuulensuu, Head of Nuclear Safety Design, Steady Energy
Status of LDR-50 Safety Demonstration
Society and Safety Culture
Timo Hakulinen (CERN): 
Experience and future perspectives of application of different safety norms in the Personnel Protection Systems of CERN particle accelerators
Kaupo Viitanen (VTT): 
Implementing Internal Independent Nuclear Safety Oversight (INSO) in the Nordic Nuclear Industry
Sami Karadeniz (VTT): 
Organizational Lessons Learned from the Olkiluoto 3 Commissioning Project
Maria Nordlund (Platom): 
The Finnish Nuclear Licensing Process – General Description
Kirsi Hassinen (Platom): 
Government's proposal for the new Nuclear Energy Act in Finland, some of its main impacts
Roope Marttila (SEATOM Technologies): 
Public Perception of Nuclear-Powered Ships in Finland, Germany, and the Netherland
Jussi-Pekka Ikonen (VTT): 
The Potential Impact of Nuclear Energy on Data Centers
Nadezhda Gotcheva (VTT): 
“Make-it-work”: Developing operational and organizational concepts for SMRs
Nuclear Waste Management
Riina Rimppi (Radiation and Nuclear Safety Authority): 
Non-Destructive Assay of Spent Nuclear Fuel Prior to Geological Disposal in Finland
- Paper
- Presentation
Erik Brücken (University of Helsinki): 
On Improving Nuclear Fuel Imaging Using Position Sensitive Detectors
- Paper
- Presentation
Weronika Wojnicka (Fortum): 
Applicability of NURES® Ion Exchange Materials for Holistic Radioactive Liquid Waste Treatment
Joseph Ridao (Karlsruhe Institute of Technology): 
Decommissioning of Nuclear Buildings: German Knowledge at European Level
Leena Torpo (Cyclife – EDF Group): 
A new treatment facility for contaminated metals in Sweden
Juho Rasmus (University of Oulu): 
Nuclear Safety and How Geopolymers can be a Part of Solution?
Ville Oinonen (Fortum): 
Final Disposal of Nuclear Waste in Finland and Special Challenges
Wade Karlsen (VTT): 
Considering decommissioning waste in new reactor materials selection
Nuclear Fuel and Reactor Materials
Lukasz Kurpaska (National Center for Nuclear Research, PL): 
Developing a new class of materials resistant to radiation, temperature, and corrosion - NOMATEN Center of Excellence initiative.
Jenna Järvenpää (VTT): 
Impact via international scientific collaboration - Examples from VTT-NOMATEN activities
Jussi Peltonen (Westinghouse): 
Development and licencing of STAV8 fuel performance code
Miika Wallius (TVO): 
Determination of Recovery Time Distributions for Water Supply Systems for Level 2 PRA
- Paper
- Presentation
Markus Olin (VTT): 
HTGR fuel and graphite back-end – GEMINI 4.0 results
Joona Saira (TVO): 
Load Follow Operation Capability of Olkiluoto 1 & 2: A Fuel Performance Perspective
William Cleary (Westinghouse): 
Specialized use of additive manufacturing techniques to prototype and evaluate next generation spacer grids
Shanrandeet Singh (LUT University): 
Advancing the Understanding of Non-Condensable Gases in Reactor Coolant Systems: Summary of the NCGDENSE Program
- Paper
- Presentation