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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.
E. C. Kovacic, Paul R. Huebotter, John E. Gates
Nuclear Science and Engineering | Volume 13 | Number 4 | August 1962 | Pages 378-384
Technical Paper | doi.org/10.13182/NSE62-A26180
Articles are hosted by Taylor and Francis Online.
Two in-pile capsule experiments have been performed to study the behavior during irradiation of a “paste” of fissionable particles settled at maximum density in a liquid-metal medium. The paste consisted of 150-µ nominal diameter, spherical particles of U-10 wt % Mo alloy in NaK and was irradiated to burnups of 0.0055 and 0.061 total at % in the Battelle Research Reactor. The irradiation capsule consisted essentially of a tube divided into two compartments by an orifice plate. The inside diameter of twin orifice tubes, projecting in either direction from the orifice plate, was such that the paste could flow by gravity from one compartment to the other. An underwater device to measure the gamma-ray emission from the irradiated fuel was used to check the mobility of the paste between increments of irradiation. The paste in the first experiment failed to flow after the first increment of irradiation, and examination of the capsule and particles failed to provide an explanation. The second experiment, performed after some refinements in procedure, was more successful. The mobility of the paste was demonstrated up to a burnup of 0.031 total at %, after which the flow became very sluggish even when assisted by vibration. Examination of the paste indicated that a buildup of oxide contamination in the capsule probably caused the sluggishness of the paste. There was no evidence in either experiment of particle agglomeration by a sintering or fission welding mechanism.
