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.
Decommissioning & Environmental Sciences
The mission of the Decommissioning and Environmental Sciences (DES) Division is to promote the development and use of those skills and technologies associated with the use of nuclear energy and the optimal management and stewardship of the environment, sustainable development, decommissioning, remediation, reutilization, and long-term surveillance and maintenance of nuclear-related installations, and sites. The target audience for this effort is the membership of the Division, the Society, and the public at large.
Utility Working Conference and Vendor Technology Expo
August 8–11, 2021
Marco Island, FL|JW Marriott Marco Island
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
Latest Journal Issues
Nuclear Science and Engineering
Fusion Science and Technology
Prepare for the nuclear PE exam with online modules and a practice exam
The next opportunity to earn professional engineer (P.E.) licensure in nuclear engineering is this fall. Now is the time to sign up and begin studying with the help of a new online module program from the American Nuclear Society.
J. Bucalossi, on behalf of Tore Supra Team
Fusion Science and Technology | Volume 56 | Number 3 | October 2009 | Pages 1366-1380
Technical Papers | Tore Supra Special Issue | dx.doi.org/10.13182/FST09-A9183
Articles are hosted by Taylor and Francis Online.
One of the main missions of the Tore Supra tokamak was to open the route toward long-pulse plasma discharges in order to investigate phenomena that are involved in steady-state plasma control. In 1992, a 1-min flattop 1-MA discharge was performed with 2.5 MW of lower hybrid current drive (LHCD) power, the main limitation being the available flux. In 1996, at 0.8 MA, the duration was extended to 120 s (290 MJ injected energy), limited by in-vessel uncontrolled outgassing of inertial parts (away from the last closed flux surface) slowly heated by the plasma radiation. At the same time, fully noninductive operation was sustained at 0.6 MA for more than 1 min using two feedback loops: the control of the loop voltage (kept at zero) with the primary and the control of the plasma current with the LHCD power.Following these results, a major upgrade of the plasma-facing components was undertaken (Composants Internes et Limiteur project) and fully implemented in 2002. The vacuum vessel is now practically fully covered with actively cooled plasma-facing components monitored by a set of infrared endoscopes. In 2003, 1 GJ of injected/extracted energy was achieved in a 6-min, 0.5-MA discharge. All the plasma parameters were kept constant during the whole discharge, the plasma current being fully noninductively driven by 3 MW of LHCD. The pulse length limitation came from the aging klystron, originally designed for 30-s operation.Experimental results and analysis of the physics involved in these long-pulse discharges are reported and discussed.