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Materials Science & Technology
The objectives of MSTD are: promote the advancement of materials science in Nuclear Science Technology; support the multidisciplines which constitute it; encourage research by providing a forum for the presentation, exchange, and documentation of relevant information; promote the interaction and communication among its members; and recognize and reward its members for significant contributions to the field of materials science in nuclear technology.
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Utility Working Conference and Vendor Technology Expo (UWC 2024)
August 4–7, 2024
Marco Island, FL|JW Marriott Marco Island
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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Fusion Science and Technology
Latest News
Vogtle-3 shuts down for valve issue
One of the new Vogtle units in Georgia was shut down unexpectedly on Monday last week for a valve issue that has since been investigated and repaired. According to multiple local news outlets, Georgia Power reported on July 17 that Unit 3 was back in service.
Southern Company spokesperson Jacob Hawkins confirmed that Vogtle-3 went off line at 9:25 p.m. local time on July 8 “due to lowering water levels in the steam generators caused by a valve issue on one of the three main feedwater pumps.”
Yukio Fujiwara, Yoshihiro Ohara, Takashi Inoue, Yoshikazu Okumura, Masahiro Tanii, Kenji Miyamoto, Keiichiro Shibata, Kazuhiro Watanabe, Naoki Miyamoto, Satoshi Suzuki
Fusion Science and Technology | Volume 30 | Number 3 | December 1996 | Pages 810-814
Plasma Fuelingand Heating, Control, and Currentdrive | doi.org/10.13182/FST96-A11963036
Articles are hosted by Taylor and Francis Online.
A 1 MeV, 50 MW Negative-ion-based Neutral Beam Injector (N-NBI) is proposed as a promising heating and current drive system for International Thermonuclear Experimental Reactor (ITER). The most crucial part of the ITER N-NBI is a negative ion source/accelerator, which is required to produce 1 MeV, 40 A D'ion beams for longer than 1000 s. The engineering design of the ion source/accelerator has progressed based on two major R&D at JAERI. One is the development of a high current negative ion source for the JT-60U N-NBI. After the demonstration of D'ion beam production of 400 keV, 13.5 A, the first neutral beam injection experiment has started from March 1996. The other is the development of a 1 MeV, 1 A accelerator which is composed of a five-stage, multi-aperture electrostatic acceleration system. The H*** ions have been successfully accelerated up to an energy of 805 keV, which is 80 % of the energy required for ITER. In addition to these R&Ds, design studies are carried out on the critical components of the ion source/accelerator. Among them, a method to control the temperature of the plasma grid by pressurized hot water is proposed to keep the negative ion production yield constant during the long pulse operation. For the durability under the high neutron environment, high purity alumina ceramics are adopted as insulator materials, and a new technology to fabricate a large insulator has been developed.