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Disruption Mitigation

The US will contribute 100% towards the disruption mitigation system (up to a capped value).

The system has two functions: 1) limiting the impacts of plasma current disruptions to the tokamak vacuum vessel, first wall blankets and other in-vessel components, and 2) suppressing the formation and deleterious effects of high energy runaway electrons. The mitigation and suppression are expected to be accomplished by rapid shattered pellet injection (SPI).For more information, contact:

For more information, contact David Rasmussen, US ITER Project Office Disruption Mitigation Team Leader, Oak Ridge National Laboratory, rasmussnda@ornl.gov | 865-574-1158

Drawing of injectors for disruption mitigation

Disruption Mitigation Task Force is Up to the Challenge

To face the challenge and to ensure that the ITER system will fulfil its purpose the ITER Disruption Mitigation Task Force has been established and an extensive program has been defined that focuses on refining system design specifications and on performing engineering work for industrialization of the technology.

Source: ITER Newsline

Plasma Disruptions Workshop Meeting March 2017

Workshop Discusses Plasma Disruptions

aAworkshop was jointly organized by ITER's Plant Engineering and Science & Operations departments to bring physics experts together with the US ITER engineers based at Oak Ridge National Laboratory (ORNL) developing the design of the disruption mitigation system. About 25 leading experts from the Members' fusion research centres and universities joined the intensive discussions.

Source: ITER Newsline

3 barrel injector prototype for disruption mitigation

Mitigating plasma disruptions in ITER: Using large cryogenic pellets, US ITER advances new fusion technology

US ITER researchers based at the Department of Energy’s Oak Ridge National Laboratory are leading the development of a disruption mitigation system to reduce the effects of plasma disruptions.

3D printed central solenoid

3D printing yields advantages for US ITER engineers

ITER, the international fusion research facility now under construction in St. Paul-lez-Durance, France, has been called a puzzle of a million pieces. US ITER staff at Oak Ridge National Laboratory are using an affordable tool—desktop three-dimensional printing, also known as additive printing—to help them design and configure components more efficiently and affordably.

Disruption mitigation studies are underway on DIII-D tokamak

Disruption mitigation researchers investigate design options

Plasma disruptions that can occur in a tokamak when the plasma becomes unstable can potentially damage plasma-facing surfaces of the machine. To lessen the impact of high energy plasma disruptions, US ITER is engaged in a global research effort to develop disruption mitigation strategies.

University of Wisconsin neutronics collaborators

“Neutronics” at Wisconsin, ORNL advances ITER shielding and international collaboration

US ITER researchers at the University of Wisconsin and Oak Ridge National Laboratory are developing advanced processes to assess ITER’s unique tokamak components and materials in the presence of the tremendous amount of neutron flux and energy released by fusion reactions. The process, called neutronics analysis, involves a palette of complex computational codes and libraries for predicting neutron impacts.