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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.
A. Kumar, M.A. Abdou, Y. Ikeda, T. Nakamura
Fusion Science and Technology | Volume 19 | Number 3 | May 1991 | Pages 1909-1918
Neutronic | Proceedings of the Ninth Topical Meeting on the Technology of Fusion Energy (Oak Brook, Illinois, October 7-11, 1990) | doi.org/10.13182/FST91-A29621
Articles are hosted by Taylor and Francis Online.
The selection of materials and design options for fusion device components depends crucially on the level of radioactivity and decayheat induced in the components subject to D-T neutron irradiation. An experimental program was carried out to obtain decay γ emission spectra from samples of Fe, Ni, Cr, MnCu alloy, Ti, Mo, Zr, Ta, W, Si, Mg, Al, V, Nb, SS316, YBa2Cu3O7 and ErBa2Cu3O7, which were subjected to simulated fusion neutron environment. Cooling times obtained ranged from 10 min to 7 days. The experimental results have been analyzed using four leading radioactivity codes: DKRICF, REAC, RACC and THIDA. The integrated decay γ emission rates (over 100 KeV to 3 MeV) have been compared in addition to decay γ emission spectra. It is observed that : (i) generally, much better agreement is found between computed (C) and experimentally measured (E) values for integrated γ emission rates as against the detailed γ spectra, (ii) C/E ratios for integrated γ emission rates are found to range from 0.001 to 300, though most of the ratios cluster between 1 to 2. Significant discrepancies are obtained on C/E ratios for a number of cases for the four codes used above. Most of the observed discrepancies are due to (a) missing or wrong fundamental decay γ-ray data, e.g., (1) missing decay data in DKRICF for 186Ta, 187W, 181W, 90mY, 86Rb, 88Y, etc., (2) wrong decay γ-intensities for W products in THIDA, (b) inaccurate activation cross sections, e.g., for V, Zr, Mo in DKRICF, RACC, REAC, (c) errors on computed neutron energy spectra, (d) various experiment related factors, essentially poor counting statistics for weak neutron induced reactions.
