Pellet Injection Technology and Application to Mitigate Transient Events on ITER

Conference · Thu Sep 01 04:00:00 EDT 2016

OSTI ID:1460242

Baylor, Larry ^[1]; Combs, Stephen Kirk ^[1]; Duckworth, Robert ^[1]; Lyttle, Mark ^[1]; Meitner, Steven ^[1]; Rasmussen, David ^[1]; Maruyama, So ^[2]

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1. ORNL
2. ITER Organization, Cadarache, France

The technology to form and accelerate cryogenically solidified pellets of hydrogen isotopes has long been under development for fueling fusion plasmas. Injectors are being designed to provide this capability for fueling ITER with DT pellets injected from the inner wall. In addition to this fueling application, the pellet technology is being further developed for ITER to mitigate transient heat fluxes and energetic particle impacts from disruptions and edge localized modes (ELMs). Large shattered impurity pellets have been found to effectively mitigate disruptions and small pellets of deuterium have been used to trigger on demand rapid small ELMs to limit the transient heat flux damage from otherwise large naturally occurring ELMs. Both of these technologies are being implemented for ITER.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1460242
• Country of Publication: United States
• Language: English