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Nakase Lab
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The lab supports the nuclear fuel cycle and the recovery of Fukushima through nuclear chemical engineering.
AboutAbout the lab
Reaching zero carbon through nuclear energy system research
The Nakase Lab broadly studies nuclear energy systems and the nuclear fuel cycle, building on nuclear chemical engineering.
It works on innovative reactors, systems that operate in synergy with renewable energy, and reprocessing and back-end technologies.
The lab also studies waste and debris from the Fukushima Daiichi Nuclear Power Plant.
In addition to experiments, it uses chemical calculations, mechanical engineering calculations, and chemical engineering calculations as appropriate, taking diverse approaches.
Key terms
- Nuclear fuel cycle
- The whole series of steps of making nuclear fuel, using it in a reactor, and processing it after use
- Reprocessing
- A process that chemically separates spent nuclear fuel into components that can still be used and components to be disposed of
- Fuel debris
- A solidified mass formed inside a reactor that had an accident, when fuel and reactor materials melted and mixed together
NewsLab news
An undergraduate student received the Institute of Science Tokyo Student Leadership Award
Gave an award lecture for the Encouragement Award at the Symposium on Solvent Extraction
Established a startup spun out of the Nakase Lab
Named a Selected Paper at FDR2024, an international conference on Fukushima decommissioning
ResearchResearch themes
The lab conducts diverse research spanning science and engineering, and many of its themes are tied to joint research and national projects. Its main pillars are building new nuclear energy systems, the nuclear fuel cycle, Fukushima recovery and revitalization, actinide chemistry, digital technology, and energy strategy research.
*Illustrative imageWaste Research for Fukushima Daiichi
The lab studies the disposal of waste from the Fukushima Daiichi Nuclear Power Plant, and methods for turning fuel debris into waste forms for disposal. The work has also been selected under the national problem-solving decommissioning research program.
*Illustrative imageMaterial Reactions in Severe Accidents
This research examines what kinds of reactions reactor materials undergo when a severe accident occurs in a light water reactor.
*Illustrative imageNuclear Energy System Strategy Research
The lab considers what nuclear energy systems should look like, drawing on technical arguments and the assessment of relevant quantities. Topics range from the integration of innovative reactors and fuel cycles and co-creation with renewable energy to the multipurpose use of nuclear energy and the development of nuclear-powered ships.
*Illustrative imageIntegrated Simulator for the Nuclear Fuel Cycle
The lab develops NMB, a simulator that handles the entire nuclear fuel cycle on a computer. Its starting point is the idea that refining only part of the cycle does not optimize the whole.
MembersFaculty
The Nakase Lab is made up of faculty members, researchers, limited-duty technical staff and technical support staff, and doctoral, master's, and undergraduate students.As of 2026
- Associate ProfessorMasahiko NakasePublications ↗
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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: “Rokkasho 2” Nife / CC BY-SA 3.0 (cropped)
- Waste Research for Fukushima Daiichi: “Fukushima Daiichi Nuclear Power Plant seen from the sea” ブルーノ・
プラス / CC BY 4.0 (cropped) - Material Reactions in Severe Accidents: “Fukushima Daiichi Nuclear Power Plant seen from the sea” ブルーノ・
プラス / CC BY 4.0 (cropped) - Nuclear Energy System Strategy Research: “Leningrad Nuclear Power Plant 20JUL2010-4” Leningrad_Nuclear_Power_Plant_20JUL2010.jpg: Bayoue derivative work: Saibo (Δ) / Public domain (cropped)
- Integrated Simulator for the Nuclear Fuel Cycle: “Rokkasho 1” Nife / CC BY-SA 3.0 (cropped)
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- Related lab (時松宏治研究室): “Raikheda power station IN 2015 (Ctpp)” Epagemakerwiki / CC BY-SA 4.0 (cropped)
- Related lab (野原研究室): “Rosetta Stone” Hans Hillewaert / CC BY-SA 4.0 (cropped)
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