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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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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.
G. W. Barnes, R. Persing, G. Schmidt, M. Gouge, L. Baylor, M. Cole, S. Combs, D. Fehling, P. W. Fisher, C. Foust, S. Milora, L. Qualls
Fusion Science and Technology | Volume 21 | Number 3 | May 1992 | Pages 1662-1664
Plasma Engineering | doi.org/10.13182/FST92-A29960
Articles are hosted by Taylor and Francis Online.
The Tritium Pellet Injector (TPI) is a cryogenic pellet injector which will be used on TFTR prior to and during the D-T phase of operations. The injector will replace the current Deuterium Pellet Injector (DPI) at Bay T with an injection capability for pellets of deuterium and/or tritium or mixtures of both. The gun will be a 4 barrel configuration (replacing the existing 8 barrel system) with one of the barrels capable of high speed. Pellet acceleration will be accomplished pneumatically using high pressure helium and hydrogen gas. The injector has one cylindrical pellet per barrel per shot with each barrel independent of the others. Velocity of the pellets when they are injected into the plasma for the single stage gun will be 1.5 km/sec which is variable from .5 to 1.5 km/sec. For the Two-Stage gun velocities will be 3.0 km/sec. The TPI program is a collaborative effort between Oak Ridge National Laboratories and Princeton Plasma Physics Lab. The TPI program provides a cryogenic tritium pellet injection capability by the Spring of 1993. The project is divided into 2 Phases. Phase 1 which supports deuterium operation and Phase 2 which supports tritium operation. Phase 1 is scheduled for implementation during the Spring of 92 with deuterium operation from April through September of 1992. A very important part of Phase 1 is to verify that the systems required for Phase 2 that are operational will be tested as part of the deuterium effort. Phase 2 is scheduled for implementation and will make the TPI tritium capable by the end of April 1993. ORNL responsibilities include assembly and design of the injector line, development of the injector control system and modification of the gas manifolds. PPPL'S tasks is the system engineering and interface of supporting systems for the operation of the injector during deuterium and also during the tritium phase of operations. This paper will address the mechanical design of the TPI injection facility provided by PPPL with the TFTR machine.
