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Sagara Lab
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The lab pursues nuclear safety, nuclear nonproliferation, and nuclear security.
AboutAbout the lab
Connecting the small world with the large world
The Sagara Lab pursues nuclear safety, nuclear nonproliferation, and nuclear security.
Using numerical analysis that spans nuclear reactions to environmental dynamics, the lab tackles global societal challenges.
The lab designs reactors that use "nuclear waste" as fuel and studies nuclear energy systems that are resilient to terrorism and natural disasters.
Toward the decommissioning of the Fukushima Daiichi Nuclear Power Station, the lab also works on non-destructive assay equipment for measuring melted-down fuel.
Key terms
- Nuclear nonproliferation
- Preventing nuclear weapons and nuclear materials from spreading to new countries or terrorist organizations
- Nuclear security
- Protecting nuclear materials and nuclear facilities from malicious acts such as theft and sabotage
- Non-destructive assay
- Measurement that examines the contents of an object using radiation or similar means, without breaking or opening it
NewsLab news
The lab's results were published in Nucl. Technol.
A doctoral student received the Doctoral Dissertation Award of the FY2025 Seiichi Teshima Memorial Award
Prof. Sagara received the Best Paper Award at the Annual Conference of the Institute of Nuclear Materials Management Japan (INMM Japan)
Prof. Sagara received the Excellent Paper Award at the Annual Conference of the Institute of Nuclear Materials Management Japan (INMM Japan)
ResearchResearch themes
With the pursuit of safety, nuclear nonproliferation, and nuclear security as its theme, the lab works on numerical analysis that links nuclear reactions to environmental dynamics. Its scope is broad, from using "nuclear waste" and countering nuclear terrorism to applications in the decommissioning of the Fukushima Daiichi Nuclear Power Station.
*Illustrative imageReactors That Use "Nuclear Waste" as Fuel
Long-lived radioactive materials, which stay radioactive for a long time, are "nuclear waste" as they are. If carefully separated and reused, however, they have the characteristics of an excellent fuel. The lab researches reactor designs that minimize nuclear waste.
*Illustrative imageNuclear Energy Systems Resilient to Threats
Nuclear accidents can be caused not only by natural disasters or errors but also by deliberate human acts such as those by terrorists. The lab researches nuclear energy systems that not only prevent such events beforehand but also keep them from escalating seriously if they do occur.
*Illustrative imageDecommissioning of Fukushima Daiichi
For the swift and safe decommissioning of the Fukushima Daiichi Nuclear Power Station, the lab researches non-destructive assay equipment that uses radiation to measure the weight of uranium and plutonium contained in melted-down fuel.
MembersFaculty
Members of the Sagara Lab include faculty and doctoral, master's, and undergraduate students.As of 2025
- ProfessorHiroshi Sagara
- Project Associate ProfessorChi Young HanPublications ↗
- Assistant ProfessorYoshiki KimuraPublications ↗
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: “Nuclear Fuel Pellets ( )” Nuclear Regulatory Commission from US / Public domain (cropped)
- Reactors That Use "Nuclear Waste" as Fuel: “Caorso fuel pool” Simone Ramella from Rome, Italy / CC BY 2.0 (cropped)
- Nuclear Energy Systems Resilient to Threats: “Cross-section of TRISO fuel pellet” ENERGY.GOV / Public domain (cropped)
- Decommissioning of Fukushima Daiichi: “Fukushima Daiichi Nuclear Power Plant seen from the sea” ブルーノ・
プラス / CC BY 4.0 (cropped) - Related lab (林﨑研究室): “CERN CCDTL LINAC 4 Prototype linear accelerator” Julian Herzog / CC BY-SA 3.0 (cropped)
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