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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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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.
Philip T. Choong, Edward A. Mason
Nuclear Technology | Volume 19 | Number 3 | September 1973 | Pages 165-173
Technical Paper | Radioisotope | doi.org/10.13182/NT73-A15878
Articles are hosted by Taylor and Francis Online.
Thermal analysis of the temperature distribution around a spinning shell under solar radiation indicated that the resultant asymmetric temperature distribution is capable of generating sufficient thermal reradiative force to stabilize small solar probes. The steady-state normal component of this force at optimum spin is barely adequate to damp out the precession of a small solar probe. This study showed that, by coating the shell surface with a radioisotopic heat source, the useful thermal reradiation force is only increased moderately. However, the optimum spin can be shifted upward by an order of magnitude to a spin range where the attitude of the spacecraft is relatively insensitive to small disturbances. By coating the shell surface with the subliming material, the sublimation force acting on the shell is increased enormously. The numerical techniques developed to solve the inherently two-dimensional transient heat flow equation having nonlinear boundary conditions appeared to be numerically stable.
