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Reimagining nuclear materials for the future of medicine
Nuclear medicine has come a long way since Henri Becquerel first observed the penetrating energy of radioactive materials in 1896. Today, technetium-99m alone is used in more than 40 million diagnostic procedures every year—from cardiovascular imaging and bone scans to cancer detection—making it the undisputed workhorse of nuclear medicine. That single statistic tells you something important: An enormous portion of modern diagnostic medicine rests on a surprisingly narrow foundation, one built around a small number of aging research reactors that were never originally designed for continuous isotope production.
Noriyuki Unno, Kazuhisa Yuki, Jun Taniguchi, Shin-ichi Satake
Fusion Science and Technology | Volume 77 | Number 7 | October-November 2021 | Pages 716-720
Technical Paper | doi.org/10.1080/15361055.2021.1894080
Articles are hosted by Taylor and Francis Online.
Efficient heat transport and energy conversion are key factors for realizing a commercial fusion reactor. A promising method for enhancing heat transport performance and simplifying the transport system is thermosiphon. However, the maximum heat flux in the evaporation unit [namely, boiling heat transfer (BHT)] of the thermosiphon system should be improved to remove heat at high heat fluxes (>10 MW/m2). To improve BHT, we propose a new technique using a vibration material excited by boiling bubbles. In this study, we investigated the characteristics of BHT with and without the vibration material with pure water at atmospheric pressure to demonstrate our concept. We demonstrated that the vibration material enhances BHT when the vibration is synchronized with the frequency of boiling bubbles emitted from the heating surface.