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Conference Spotlight
2025 ANS Winter Conference & Expo
November 9–12, 2025
Washington, DC|Washington Hilton
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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.
Seong Woo Kang, Jae-Hwan Yang, Man-Sung Yim
Nuclear Technology | Volume 206 | Number 10 | October 2020 | Pages 1593-1606
Technical Paper | doi.org/10.1080/00295450.2020.1713680
Articles are hosted by Taylor and Francis Online.
The purpose of this study is to examine the feasibility of using bismuth-embedded SBA-15 (Bi-SBA-15) as gaseous iodine filtration material for applications at higher temperatures, such as environmental release severe accident mitigation, while reducing the cost of production and maintaining its iodine adsorption capacity. It was shown that Bi-SBA-15 can be produced in a much more economically feasible way by (1) increasing the amount of the chemical reagents for SBA-15 synthesis, (2) decreasing the amount of other chemicals required to facilitate the chemical reactions, and (3) reducing the synthesis time, all while maintaining the iodine adsorption capability. Through both closed and open iodine adsorption experiments, it was shown that Bi-SBA-15 has a much higher adsorption capacity than silver-exchanged zeolites at 423°K (150°C) but decreases sharply as the temperature increases, resulting in about half of the iodine adsorption capacity of AgX at 523 K (250°C). Assuming that the commercialized cost of Bi-SBA-15 could be less than half of silver-exchanged zeolites, Bi-SBA-15 may be able to replace silver-exchanged zeolites at higher-temperature applications but only if the temperature of the gaseous iodine is less than 423 K (150°C) or if there is a presystem such as a pool scrubber to reduce the temperature of the gaseous iodine reaching the iodine filtration system. If Bi-SBA-15 can be produced much less expensively at a small fraction of cost compared with silver-exchanged zeolites, it may even be used at a temperature up to 523 K (250°C) with high enough iodine capture efficiency by simply increasing the mass of Bi-SBA-15 to more than double the mass of the required silver-exchanged zeolites.