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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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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.
C. L. Schuske, S. J. Altschuler
Nuclear Technology | Volume 19 | Number 2 | August 1973 | Pages 84-95
Technical Paper | Chemical Processing | doi.org/10.13182/NT73-A31323
Articles are hosted by Taylor and Francis Online.
A model has been developed for calculating critically safe storage arrays of cylindrical vessels containing water/fissile oxide mixtures of PuO2 (96% 239Pu and 4% 240Pu) or UO2 (93.4% 235U and 6.6% 238U). It was assumed that these arrays were in air surrounded by a 12-in.-thick concrete vault. This model uses the concepts of surface density and unit surface-to-volume ratio to define safe array parameters. The model handles fissile densities ranging from that of the theoretical crystal down to ∼1kg/liter and containers whose shapes range from 300-cm-high thin cylinders to flat slab-shaped containers. Correction factors for dry oxide storage at various densities have also been developed for the cases where water can be prevented from entering the oxide containers. A considerably greater weight of oxide can be stored when water can be precluded. The effect of several inches of water on the concrete floor lowers keff ∼3%. (The units are assumed to be at least 12 in. above the floor.)
