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Conference Spotlight
2025 ANS Winter Conference & Expo
November 9–12, 2025
Washington, DC|Washington Hilton
Standards Program
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.
Charles C. McPheeters, John C. Biery
Nuclear Technology | Volume 6 | Number 6 | June 1969 | Pages 573-581
Technical Paper and Note | doi.org/10.13182/NT69-A28287
Articles are hosted by Taylor and Francis Online.
The characteristics of a sodium-system plugging indicator have been studied with the instrument operated in both the bare orifice and partially plugged modes. The “plugging temperature” produced when the orifice is initially bare indicates the point where nucleation of the impurity is first noted and is strongly influenced by flow rate and cooling rate. Thus, in the bare orifice mode the meter must be calibrated to produce oxygen concentration as a function of plugging temperature. In the partially plugged mode, saturation temperature is indicated each time a flow rate arrest occurs, and, therefore, no calibration is required. Also, with Na2O on the orifice, the rate of flow increase or decrease through the orifice permits the calculation of mass transfer coefficients for the dissolution or precipitation of Na2O.
