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Watanabe-Chida-Seki Lab
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A lab that studies how radioactive waste can be confined underground.
AboutAbout the lab
Tracking nuclides as they move through groundwater.
The Watanabe Lab studies how nuclides move when radioactive waste is disposed of underground.
The use of large-scale energy sources such as nuclear power and nuclear fusion involves the generation of radioactive materials.
The lab investigates how nuclides migrate in environments with groundwater, from a perspective that treats energy and material flows as a whole.
Building a repository requires large amounts of cement-based materials, so how those materials change after backfilling is also a subject of research.
Key terms
- Nuclide migration
- The movement of radioactive elements (nuclides) underground, carried by groundwater and other media
- Groundwater environment
- The environment beneath the ground surface where groundwater exists and flows
- Cement-based materials
- Materials whose main component is cement. They are used in large quantities to build repositories
NewsLab news
A student received the Atomic Energy Society of Japan's FY2025 Tohoku Branch Encouragement Award
The Watanabe Lab was established, succeeding the Niibori Lab
A master's student received a Research Encouragement Award at the 11th Next-Generation Initiative Decommissioning Technology Conference
A master's student received an Excellence Award at the cross-disciplinary seminar of the Department of Quantum Science and Energy Engineering
A master's student received an Excellence Award at the cross-disciplinary seminar of the Department of Quantum Science and Energy Engineering
ResearchResearch themes
The use of large-scale energy sources such as nuclear power and nuclear fusion involves the generation of radioactive materials, and therefore also requires environmental protection. To evaluate nuclide migration in groundwater environments, the lab studies the modeling of microscopic processes from a systems perspective that treats energy and material flows as a whole.
*Illustrative imageSubsurface transport phenomena and long-term performance of disposal
The lab investigates the long-term performance of disposal systems by understanding transport phenomena underground, while also considering the effects that building underground structures has on the geosphere environment.
*Illustrative imageEvolution of cement-based materials and containment performance
Building a repository requires large amounts of cement-based materials. The lab considers how these materials change after backfilling and how this affects groundwater, evaluates disposal systems in complex settings, and works to improve containment performance.
MembersFaculty
The Watanabe Lab consists of faculty members, master's and undergraduate students, and an administrative assistant.As of 2026
- ProfessorMasayuki Watanabe
- Associate ProfessorTaiji Chida
- Assistant ProfessorTsugumi Seki
VoicesStudent voices
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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: “Low Level Waste Disposal ( )-es” Nuclear Regulatory Commission from US de la traducción Pitana / CC BY-SA 4.0 (cropped)
- Subsurface transport phenomena and long-term performance of disposal: “Yucca Mountain tunnel” Nuclear Regulatory Commission / CC BY 2.0 (cropped)
- Evolution of cement-based materials and containment performance: “Cast in place reinforced concrete without finishing. Забетонированный свод станции Лесопарковая без отделки” STALFORM Engineering / CC BY-SA 3.0 (cropped)
- Related lab (Kirishima Lab): “Radiochemistry work in Glovebox” Idaho National Laboratory / CC BY 2.0 (cropped)
- Related lab (Nuclear Fuel Science Lab): “Radiochemistry Laboratory ( )” IAEA Imagebank / CC BY 2.0 (cropped)
- Related lab (Aoki-Miyake Lab): “Levitation of a magnet on a superconductor” Julien Bobroff (user:Jubobroff), Frederic Bouquet (user:Fbouquet), Jeffrey Quilliam, LPS, Orsay, France / CC BY-SA 3.0 (cropped)
- Related lab (Watanabe-Abe Lab): “Chapelcross Nuclear Power Station - geograph.org.uk - 1274138” M J Richardson / CC BY-SA 2.0 (cropped)
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