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
2026 ANS Annual Conference
May 31–June 3, 2026
Denver, CO|Sheraton Denver
Latest Magazine Issues
Jan 2026
Jul 2025
Latest Journal Issues
Nuclear Science and Engineering
January 2026
Nuclear Technology
December 2025
Fusion Science and Technology
November 2025
Latest News
Illinois lifts moratorium on new large nuclear reactors
New power reactors of any size can be now be sited in the state of Illinois, thanks to legislation signed by Gov. J. B. Pritzker on January 8. The Clean and Reliable Grid Affordability Act (CRGA)—which Pritzker says is designed to lower energy costs for consumers, drive the development of new energy resources in the state, and strengthen the grid—lifts the moratorium on new, large nuclear reactors that Illinois enacted in the late 1980s.
D. N. Ruzic, D. B. Hayden
Fusion Science and Technology | Volume 31 | Number 2 | March 1997 | Pages 123-127
Technical Paper | Divertor System | doi.org/10.13182/FST97-A30814
Articles are hosted by Taylor and Francis Online.
One option for particle and power handling in the International Thermonuclear Experimental Reactor (ITER) is the creation of a low-pressure (∼10-mTorr) gaseous divertor. The divertor would have a long channel over which energy would be removed from the plasma by radiation, and the plasma pressure would be balanced by a change inflow velocities and neutral pressures entering the sides of the channel This combination should substantially reduce the ion energy and ion flux that impact the eventual end of the divertor channel. For this concept to work, momentum must be removed from the plasma by the neutral atoms and molecules. Plasma parameters were taken from a DDC83 code solution. A Monte Carlo treatment of the plasma-neutral interactions has been obtained using DEGAS, which includes charge-exchange, recombination, ion-neutral, and neutral-neutral elastic collisions. Results show that the momentum transferred to the side walls is insufficient by two orders of magnitude to achieve the pressure reduction needed. Each molecule that enters the plasma makes hundreds of elastic and inelastic collisions in the plasma and then is more likely to be ionized (transferring the momentum back to the plasma) than to travel to a wall.