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Conference Spotlight
2026 Annual Conference
May 31–June 3, 2026
Denver, CO|Sheraton Denver
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Fusion Science and Technology
November 2025
Latest News
What’s the most difficult question you’ve been asked as a maintenance instructor?
Blye Widmar
"Where are the prints?!"
This was the final question in an onslaught of verbal feedback, comments, and critiques I received from my students back in 2019. I had two years of instructor experience and was teaching a class that had been meticulously rehearsed in preparation for an accreditation visit. I knew the training material well and transferred that knowledge effectively enough for all the students to pass the class. As we wrapped up, I asked the students how they felt about my first big system-level class, and they did not hold back.
“Why was the exam from memory when we don’t work from memory in the plant?” “Why didn’t we refer to the vendor documents?” “Why didn’t we practice more on the mock-up?” And so on.
Hiroshige Kumamaru
Fusion Science and Technology | Volume 81 | Number 7 | October 2025 | Pages 766-788
Research Article | doi.org/10.1080/15361055.2025.2476824
Articles are hosted by Taylor and Francis Online.
Numerical calculations have been conducted on liquid-metal magnetohydrodynamic (MHD) flows through a circular pipe entering or leaving an obliquely magnetic field, in order to simulate MHD flows entering/leaving a fusion reactor blanket through inlet/outlet pipes inclined in the toroidal direction (Type-T model) and the poloidal direction (Type-P model). The main purpose of this study is to examine where the loss coefficient (i.e. the pressure drop) through the magnetic field inlet/outlet regions can be decreased by the inclined inflow/outflow, compared with those by the perpendicular (normal) inflow/outflow, or not. Conservation equations of fluid mass and fluid momentum, and the Poisson equation for electrical potential have been solved numerically. The loss coefficient (i.e. the pressure drop) for the inclined inlet/outlet flows in the Type-T model (inclined in the toroidal direction) is smaller than those for the perpendicular (normal) inlet/outlet channel flows, though the loss coefficient for the inclined inlet/outlet channel flows in the Type-P model (inclined to the poloidal direction) is larger than those for the perpendicular (normal) inlet/outlet channel flows.
