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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.
Hong-Ming Liu, Pin-Chieh Hsu
Nuclear Technology | Volume 168 | Number 3 | December 2009 | Pages 919-923
Dose/Dose Rate | Special Issue on the 11th International Conference on Radiation Shielding and the 15th Topical Meeting of the Radiation Protection and Shielding Division (PART 3) / Radiation Protection | doi.org/10.13182/NT09-A9327
Articles are hosted by Taylor and Francis Online.
The 10B dose in boron neutron capture therapy (BNCT) was usually determined by multiplying the thermal neutron flux by the 10B concentration and the dose conversion factor. In this kind of application, the thermal neutron flux was commonly measured using gold foil activation techniques with and without the cadmium cover, assuming that the neutron spectrum has a Maxwellian distribution in the thermal range. This always generated uncertainties because the thermal neutron energy spectrum has no Maxwellian distribution in the body. The potential to determine the 10B dose by using a single LiF thermoluminescent dosimeter (TLD) is studied.The 10B dose in BNCT derives from the reaction of the thermal neutron with the 10B element. It always dominates the irradiation dose if the 10B concentration is higher than 20 ppm. Since the trends of the 10B absorption cross sections are similar to 6Li in the thermal neutron range, the LiF-TLD can be used for 10B dose determination in BNCT if the reaction of the thermal neutron with 6Li dominates the TLD response. The MCNP code is used to simulate the energy deposition in various LiF-TLDs and to show the suitability of LiF-TLD used for 10B dose determination in BNCT.The preliminary MCNP simulation shows that the TLD response strongly depends on the 6LiF content in the TLD. Comparing the TLD response, the 10B reaction, and the thermal neutron flux, they show the same distribution as a function of depth in a phantom irradiated with the BNCT neutron. On the other hand, not only is there a thermal neutron flux depression due to self-shielding within the TLD chip, but also there is significant perturbation around the TLD if the 6LiF content in the TLD is high enough. To balance these two factors, TLD-100 was recommended as a 10B dosimeter for BNCT.
