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Thermal Energy Systems Lab
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A lab that measures heat and flow to support next-generation nuclear energy.
AboutAbout the lab
Seeing and measuring heat flow and boiling water
The Thermal Energy Systems Lab conducts research toward accelerator-driven systems, high-density heat transport using boiling heat transfer, neutron imaging, and the development of two-phase flow measurement techniques.
By raising the heat removal limit with water as the working fluid and visualizing gas-liquid two-phase flow with neutron radiography, among other work, the lab contributes to the thermal-hydraulic design of next-generation nuclear energy systems.
Key terms
- Boiling heat transfer
- The very efficient transport of heat that occurs when a liquid boils
- Neutron radiography
- A technique that reveals the internal structure of an object from the image formed by neutrons passing through it
- Two-phase flow
- A flow in which gas and liquid move together, mixed
ResearchResearch themes
The lab studies the thermal fluid dynamics of next-generation nuclear energy systems through high-density heat transport, neutron imaging, and two-phase flow measurement.
*Illustrative imageResearch toward Accelerator-Driven Systems
For spallation neutron sources, which produce neutrons by hitting a heavy metal with accelerated particles, the lab studies target designs for removing the large amount of heat generated.
*Illustrative imageHigh-Density Heat Transport by Boiling
Using water as the working fluid, the lab conducts basic research on how high an energy transport density can be achieved, by raising the heat removal limit and enhancing heat transfer, and applies the results to the thermal-hydraulic design of next-generation nuclear energy systems.
*Illustrative imageNeutron Imaging
Using neutron radiography, the lab carries out fluid visualization by high-speed imaging, void fraction measurement in two-phase flow, research on thermal fluid dynamics during severe accidents, and the development of radiography with fast neutrons.
*Illustrative imageTwo-Phase Flow Measurement Techniques
The lab refines measurement techniques such as the four-sensor probe, electromagnetic velocimeter, wire-mesh sensor, and PIV, and combines them to build up new knowledge about the flow structure of two-phase flow.
MembersFaculty
- ProfessorYasushi Saito
- Associate ProfessorKei Ito
- Associate ProfessorCheolho Bahn
- Program-Specific Associate ProfessorDaisuke Ito
- Assistant ProfessorNaoya Odaira
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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: “ORNL Spallation Neutron Source ( )” ENERGY.GOV / Public domain (cropped)
- Research toward Accelerator-Driven Systems: “Oak Ridge Spallation Neutron Source Aerial View” ENERGY.GOV / Public domain (cropped)
- High-Density Heat Transport by Boiling: “Bubbles inside boiling water” Snehit Jamere / CC BY-SA 4.0 (cropped)
- Neutron Imaging: “Neutron imaging fuel injectors ( )” Oak Ridge National Laboratory / CC BY 2.0 (cropped)
- Two-Phase Flow Measurement Techniques: “Two-phase flow types” MichaelFYP / CC BY-SA 4.0 (cropped)
- Related lab (原子力防災システム研究分野): “UO2lattice” Cadmium at English Wikipedia / Public domain (cropped)
- Related lab (核物質管理学研究分野): “UO2 Pellet” Chemolunatic / CC BY-SA 4.0 (cropped)
- Related lab (放射線管理学研究分野): “Dosimeter measuring radiation in the Chernobyl Exclusion Zone” Jennifer Boyer from Fredrick, Maryland, USA / CC BY 2.0 (cropped)
- Related lab (核変換システム工学研究分野): “10,000th Operation at the Annular Core Research Reactor - Sept. )” Nuclear Regulatory Commission from US / Public domain (cropped)
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