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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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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.
Adrián E. Méndez Torres, Mark Antonio Prelas, Louis M. Ross, Jr., Tushar K. Ghosh
Nuclear Technology | Volume 169 | Number 3 | March 2010 | Pages 271-278
Technical Paper | Materials for Nuclear Systems | doi.org/10.13182/NT10-A9379
Articles are hosted by Taylor and Francis Online.
Experimental results of the diffusion of chromium(II) in natural diamond powder (Cr:NDP) of 60 to 80 m using modified field enhanced diffusion with optical activation (MOD:FEDOA) are presented. MOD:FEDOA is a promising technique for incorporation of impurities into wide band gap powders in the nanometer-to-micrometer range. MOD:FEDOA uses a combination of thermal diffusion with electrical potential, thermal ionization, and optical ionization combined in one setup, developed as a primary tool for the diffusion of various impurities into diamond. The effect of the diffusion process was studied with micro-Raman and a scanning electron microscope equipped with an energy-dispersive X-ray spectrometer (EDS). Raman analysis shows an increase in disorder in the treated sample. The main Raman peak in diamond was identified at 1332 cm-1 , indicating that the sample maintained the diamond crystal structure after the incorporation of chromium (Cr). Secondary electron images show an increase in surface roughness, rounding of crystalline faces by oxidation, and microfractures in the treated diamond powder. Backscattered electron images revealed deposition of impurities on the surfaces of diamonds after doping. EDS and Raman shift confirmed the presence of Cr in diamond particles after treatment. Other impurities, Si and O, were also identified by EDS and micro-Raman. This work presents strong evidence that Cr can be incorporated into natural diamond. It also suggests that Cr:NDP is suitable for applications in nuclear industries such as radiation shield and cladding material. Further, this work offers the possibility to develop novel diamond-based materials that can be used in the nuclear field.
