ANS is committed to advancing, fostering, and promoting the development and application of nuclear sciences and technologies to benefit society.
Explore the many uses for nuclear science and its impact on energy, the environment, healthcare, food, and more.
Explore membership for yourself or for your organization.
Conference Spotlight
Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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!
Latest Magazine Issues
Jul 2025
Jan 2025
Latest Journal Issues
Nuclear Science and Engineering
August 2025
Nuclear Technology
Fusion Science and Technology
Latest News
ANS joins others in seeking to discuss SNF/HLW impasse
The American Nuclear Society joined seven other organizations to send a letter to Energy Secretary Christopher Wright on July 8, asking to meet with him to discuss “the restoration of a highly functioning program to meet DOE’s legal responsibility to manage and dispose of the nation’s commercial and legacy defense spent nuclear fuel (SNF) and high-level radioactive waste (HLW).”
Gen Chen, Yanping Zhao, Yuzhou Mao, Yuan Shuai, Xinjun Zhang, Chengming Qing
Fusion Science and Technology | Volume 71 | Number 2 | February 2017 | Pages 144-149
Technical Paper | doi.org/10.13182/FST15-228
Articles are hosted by Taylor and Francis Online.
Ion cyclotron resonance frequency (ICRF) heating is one of the traditional auxiliary heating methods adopted in the Experimental Advanced Superconducting Tokamak (EAST). The radio-frequency (rf) source consisting of eight transmitters has been fabricated since 2012 and has a working frequency of 24 to 70 MHz. It has a maximum total power of ~12 MW. However, the power injection into plasma has been restricted by the variable antenna load, which is sensitive to the scrape-off-layer boundary condition and the gradient distribution of plasma density. Triple liquid stub tuners, which have been employed for ICRF impedance matching, cannot cope with such rapid variations because of the low response speed. In previous research, a 300-kW ferrite tuner (FT) was developed and tested, but it was not good enough to meet the requirements of real-time impedance matching. Research on a high-power fast-response FT with maximum power of 1.5 MW was carried out to achieve real-time tuning to trace the load variations of the antenna. The design parameters of the FT were determined according to the experimental data of the antenna load in EAST. The ferrite material, rf circuit, and magnet system of the FT were discussed to satisfy the design goals. The test results showed good performance of response time, differential phase shift, and insertion loss, which was extremely significant for the high-power, real-time operation of an impedance matching network based on FTs.