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Conference Spotlight
2025 ANS Winter Conference & Expo
November 9–12, 2025
Washington, DC|Washington Hilton
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The Standards Committee is responsible for the development and maintenance of voluntary consensus standards that address the design, analysis, and operation of components, systems, and facilities related to the application of nuclear science and technology. Find out What’s New, check out the Standards Store, or Get Involved today!
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Latest News
Empowering the next generation: ANS’s newest book focuses on careers in nuclear energy
A new career guide for the nuclear energy industry is now available: The Nuclear Empowered Workforce by Earnestine Johnson. Drawing on more than 30 years of experience across 16 nuclear facilities, Johnson offers a practical, insightful look into some of the many career paths available in commercial nuclear power. To mark the release, Johnson sat down with Nuclear News for a wide-ranging conversation about her career, her motivation for writing the book, and her advice for the next generation of nuclear professionals.
When Johnson began her career at engineering services company Stone & Webster, she entered a field still reeling from the effects of the Three Mile Island incident in 1979, nearly 15 years earlier. Her hiring cohort was the first group of new engineering graduates the company had brought on since TMI, a reflection of the industry-wide pause in nuclear construction. Her first long-term assignment—at the Millstone site in Waterford, Conn., helping resolve design issues stemming from TMI—marked the beginning of a long and varied career that spanned positions across the country.
Kazuhisa Yuki, Hidetoshi Hashizume, Saburo Toda
Fusion Science and Technology | Volume 60 | Number 1 | July 2011 | Pages 238-242
Divertor & High Heat Flux Components | Proceedings of the Nineteenth Topical Meeting on the Technology of Fusion Energy (TOFE) (Part 1) | doi.org/10.13182/FST11-A12359
Articles are hosted by Taylor and Francis Online.
A sub-channels-inserted porous evaporator is proposed as a heat removal device of the divertor with a heat load exceeding 10 MW/m2. The porous medium is made by sintering copper particles of micro size in diameter and has several sub-channels to enhance discharge of generated vapor outside the porous medium. This porous cooling devise is attached onto the backside of the divertor and remove the heat by evaporating water passing through the porous medium against the heat flow. In order to prove the effect of the sub-channels, the heat transfer characteristics of this porous device are evaluated experimentally using a plasma arcjet as a high heat flux source. The result shows that the heat transfer performance of copper-particles-sintered porous medium with the sub-channels enables to remove much higher heat flux under lower flow rate and lower wall superheat conditions, compared with the normal porous media. The removal heat flux, 8.1 MW/m2, is 1.8 times as higher than that of the normal porous medium at a wall superheat of 50 degrees (the heat transfer coefficient, 1.6 × 105 W/m2/K, is 2.4 times as higher). The removal heat flux reaches almost 10 MW/m2 although the wall superheat exceeds 100 degrees (The wall temperature is approximately 220 degrees C. still in a fully developed boiling regime). In addition, the removal heat flux exceeds 20 MW/m2 by increasing the number of the sub-channels under lower wall superheat conditions, which proves high potential of the sub-channels-inserted porous evaporator.
