27th IEEE Symposium on Fusion Engineering

Session

T.OP2: Fueling, Exhaust, and Vacuum Systems

T.OP2

6 Jun 2017, 16:00

Marriott Shanghai City Center

499. Brief History and Status of Cryogenic Pellets in Fusion Energy Research

Mr Stephen K. Combs (Oak Ridge National Laboratory)

06/06/2017, 16:00

Fueling, exhaust, and vacuum systems

Invited Oral

Brief History and Status of Cryogenic Pellets in Fusion Energy Research*

S. K. Combs
Oak Ridge National Laboratory, Oak Ridge, TN 37831-6169
combssk@ornl.gov

High-speed injection of solid fuel was first proposed in 1954 (Spitzer et al., USAEC Report NYO-6047) as a possible solution to the problem of transporting fresh fuel across the confining magnetic fields into the plasma of a fusion...

246. DESIGN OF CRYOGENIC TWIN SCREW HYDROGEN EXTRUDER SYSTEM

Mr Samiran Shanti Mukherjee (Institute for Plasma Research, India)

06/06/2017, 16:20

Fueling, exhaust, and vacuum systems

Oral

Fuelling system is an important technological component of a fusion machine. With the advancement towards building up fusion reactors, plasma parameters like density and temperature are on rising scale. To have peaked density profile in such plasmas, fuelling by pellet injection has proved as efficient technology. India has its internal program for development of pellet injectors. The...

311. Core fueling of DEMO by direct line injection of high-speed pellets from the HFS

Dr Antonio Frattolillo (ENEA C.R. Frascati)

06/06/2017, 16:40

Fueling, exhaust, and vacuum systems

Oral

Core fuelling of a DEMO tokamak fusion reactor is under investigation within the EUROfusion Work Package “Tritium, Fuelling and Vacuum” (WP-TFV). An extensive analysis of fuelling requirements and of related presently available fuelling technologies, indicate that pellet injection still represents, to date, the most realistic option. Modelling of both pellet penetration and fuel deposition...

142. Refined Multiphysics Analysis of W7-X Cryopumps

Dr Jiawu Zhu (Max-Planck-Institut für Plasmaphysik)

06/06/2017, 17:00

Fueling, exhaust, and vacuum systems

Oral

Ten identical cryopumps (CVP) are to be installed in corresponding divertor volumes of Wendelstein 7-X (W7-X) stellarator before commencing the steady state phase of operation (OP 2). Each CVP is typically made of two units connected by a transfer line and is fed with a dedicated plug-in. The units consist of water baffle, liquid nitrogen (LN2) baffle, helium panel and LN2 cooled housing. All...

349. SUB-DIVERTOR NEUTRAL GAS DYNAMICS: INTEGRATION BETWEEN THE VACUUM SYSTEM AND THE DIVERTOR OPERATION

Dr Stylianos Varoutis (Karlsruhe Institute of Technology (KIT))

06/06/2017, 17:20

Fueling, exhaust, and vacuum systems

Invited Oral

Over the last few years much effort has been invested in modeling the complex geometry of divertor and subdivertor region in tokamak fusion devices. The main goal is the investigation of the impact of neutral gas dynamics on the particle removal process, during operation. Depending on the plasma conditions at the divertor, the exhausted neutral gas flow is more likely to be in the continuum...

434. Hydrogen Isotope Separation by Cryogenic Chromatography in Processing Tokamak Exhaust Gas

Dr Chengjian Xiao (Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics)

06/06/2017, 17:40

Fueling, exhaust, and vacuum systems

Oral

In addition to rapid recovery and processing plasma ash discharge gases, fast separation of hydrogen isotopes and rapid D-T fuel balance is also an important technical content of TEP system. In this paper a cryogenic chromatography method for reprocessing Tokamak exhaust gas is described. The experimental apparatus consists of a column with carbon molecular sieve used as exhaust storing and...