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Yamaji Lab
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The lab uses simulation to explore nuclear power plant accidents and the reactors of the future.
AboutAbout the lab
Exploring nuclear power plant accidents through simulation
The Yamaji Lab systematically studies nuclear power generation technology while researching accidents and next-generation reactors.
A distinctive feature of the lab is its ability to simulate Generation II to Generation IV nuclear power plants consistently, from severe accidents to the fuel and core design of next-generation reactors.
The results are used to improve reactor safety through national projects, such as research on putting new types of fuel into practical use and research on decommissioning the Fukushima Daiichi Nuclear Power Station, as well as through joint research with private companies.
Key terms
- Severe accident
- A serious accident in which a reactor can no longer be cooled or controlled and the core is damaged
- MPS method (particle method)
- An analysis method that treats a fluid as a collection of fine particles and calculates its motion on a computer
- Accident-tolerant fuel
- A new type of reactor fuel designed to resist damage even when an accident occurs
NewsLab news
Students received an Excellence Award and an Encouragement Award at the student research presentation meeting of the Kanto-Koetsu Chapter of the Atomic Energy Society of Japan
Professor Nobuyuki Iwamoto received a Commendation by the Minister of Education, Culture, Sports, Science and Technology
Students received an Excellence Award and an Encouragement Award at the student research presentation meeting of the Kanto-Koetsu Chapter of the Atomic Energy Society of Japan
ResearchResearch themes
The Yamaji Lab systematically studies nuclear power generation technology and researches its accidents and next-generation reactors. The lab can simulate Generation II to Generation IV nuclear power plants consistently, from severe accidents to the fuel and core design of next-generation reactors.
*Illustrative imageCore design and nuclear data for Generation IV reactors
This research designs reactor cores like those of commercial reactors through full-scale simulation. It deals with the cores of Generation IV reactors, the next generation, and the nuclear data needed for them.
*Illustrative imageDesign and behavior analysis of accident-tolerant fuel
For new types of fuel rods used in commercial reactors, the lab calculates internal temperature, pressure, and mechanical load, and analyzes their behavior during accidents.
*Illustrative imageAccident and safety research on nuclear power plants
The lab runs simulations that reproduce real accidents at the same scale as actual plants, and studies plant accidents and safety.
*Illustrative imageAnalysis of molten core behavior with the particle method
Using the particle method (the MPS method), the lab analyzes and visualizes how the material of a core melted in an accident flows until it comes to rest.
MembersFaculty
The Yamaji Lab consists of faculty members, researchers, and doctoral, master's, and undergraduate students.As of 2026
- ProfessorAkifumi Yamaji
- ProfessorTomoo Fukahori
- ProfessorNobuyuki Iwamoto
- Associate ProfessorTomohiro Kawanishi
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RelatedLabs similar to Yamaji Lab
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Uraninite Mouseeye5” Weirdmeister / CC BY-SA 4.0 (cropped)
- Core design and nuclear data for Generation IV reactors: “Go” Dietmar Rabich / CC BY-SA 4.0 (cropped)
- Design and behavior analysis of accident-tolerant fuel: “Zirconium (40 Zr)” Hi-Res Images of Chemical Elements / CC BY 3.0 (cropped)
- Accident and safety research on nuclear power plants: “Red onion cross section 04” Amada44 / CC BY-SA 3.0 (cropped)
- Analysis of molten core behavior with the particle method: “Pāhoehoe Lava flow” Brocken Inaglory / CC BY-SA 3.0 (cropped)
- Related lab (Furuya Lab): “Laminar-turbulent transition” Gary Settles / CC BY-SA 3.0 (cropped)
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