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Division Spotlight
Robotics & Remote Systems
The Mission of the Robotics and Remote Systems Division is to promote the development and application of immersive simulation, robotics, and remote systems for hazardous environments for the purpose of reducing hazardous exposure to individuals, reducing environmental hazards and reducing the cost of performing work.
Meeting Spotlight
Nuclear and Emerging Technologies for Space (NETS 2025)
May 4–8, 2025
Huntsville, AL|Huntsville Marriott and the Space & Rocket Center
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
Sellafield waste vault yields 1960s-era finds
A 1960s Electrolux vacuum cleaner was among the more unusual items workers removed from one of the world’s oldest nuclear waste stores at the United Kingdom’s Sellafield nuclear site.
S. K. Combs et al.
Fusion Science and Technology | Volume 64 | Number 3 | September 2013 | Pages 513-520
Fusion Technologies: Heating and Fueling | Proceedings of the Twentieth Topical Meeting on the Technology of Fusion Energy (TOFE-2012) (Part 2) Nashville, Tennessee, August 27-31, 2012 | doi.org/10.13182/FST13-A19144
Articles are hosted by Taylor and Francis Online.
A compact pellet injector has been built/tested at Oak Ridge National Laboratory (ORNL) for the TJ-II stellarator. The design is an upgraded version of that used for the ORNL injector installed on the Madison Symmetric Torus (MST). It is a four-barrel system equipped with a cryogenic refrigerator for in situ hydrogen pellet formation, a propellant valve system for pellet acceleration (speeds ~1000 m/s), pellet diagnostics, and an injection line. On TJ-II, it will be used as an active diagnostic and for fueling. To accommodate the plasma experiments planned for TJ-II, pellet sizes significantly smaller than those used for the MST application are required. The system has been initially equipped with four pellet sizes, with the gun barrel bores ranging between 0.4 and 1.0 mm. The most challenging technical issue is achieving reliable operation with the smallest pellet size. The system is described, highlighting the new features added since the original MST injector was constructed. Results from laboratory testing are presented and discussed, including the range of pellet sizes and speeds that will be available for initial experiments on TJ-II and the expected reliability of delivering intact pellets to the plasmas.