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Title: ARC: A compact, high-field, fusion nuclear science facility and demonstration power plant with demountable magnets

Journal Article · · Fusion Engineering and Design

The affordable, robust, compact (ARC) reactor is the product of a conceptual design study focused on reducing the size, cost, and complexity of a combined fusion nuclear science facility (FNSF) and demonstration fusion Pilot power plant. ARC is a ~200–250 MWe tokamak reactor with a major radius of 3.3 m, a minor radius of 1.1 m, and an on-axis magnetic field of 9.2 T. ARC has rare earth barium copper oxide (REBCO) superconducting toroidal field coils, which have joints to enable disassembly. This enables the vacuum vessel to be replaced quickly, mitigating first wall survivability concerns, and permits a single device to test many vacuum vessel designs and divertor materials. The design point has a plasma fusion gain of Qp ≈ 13.6, yet is fully non-inductive, with a modest bootstrap fraction of only ~63%. Thus ARC offers a high power gain with relatively large external control of the current profile. This highly attractive combination is enabled by the ~23 T peak field on coil achievable with newly available REBCO superconductor technology. External current drive is provided by two innovative inboard RF launchers using 25 MW of lower hybrid and 13.6 MW of ion cyclotron fast wave power. The concluding efficient current drive provides a robust, steady state core plasma far from disruptive limits. ARC uses an all-liquid blanket, consisting of low pressure, slowly flowing fluorine lithium beryllium (FLiBe) molten salt. The liquid blanket is low-risk technology and provides effective neutron moderation and shielding, excellent heat removal, and a tritium breeding ratio ≥ 1.1. The large temperature range over which FLiBe is liquid permits an output blanket temperature of 900 K, single phase fluid cooling, and a high efficiency helium Brayton cycle, which allows for net electricity generation when operating ARC as a Pilot power plant.

Research Organization:
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Fusion Energy Sciences (FES); National Science Foundation (NSF)
Grant/Contract Number:
FG02-94ER54235; SC008435; FC02-93ER54186
OSTI ID:
1548312
Alternate ID(s):
OSTI ID: 1252044
Journal Information:
Fusion Engineering and Design, Vol. 100, Issue C; ISSN 0920-3796
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 280 works
Citation information provided by
Web of Science

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Cold plasma finite element wave model for helicon waves journal February 2019
Experimental energy confinement time scaling with dimensionless parameters in C-Mod I-mode plasmas journal October 2019
20 years of research on the Alcator C-Mod tokamaka) journal November 2014
On microinstabilities and turbulence in steep-gradient regions of fusion devices journal February 2019
UEDGE modelling of detached divertor operation for long-leg divertor geometries in ARC journal March 2018
Fusion Blankets and Fluoride-Salt-Cooled High-Temperature Reactors with Flibe Salt Coolant: Common Challenges, Tritium Control, and Opportunities for Synergistic Development Strategies Between Fission, Fusion, and Solar Salt Technologies journal December 2019
Basic physical processes and reduced models for plasma detachment journal March 2018
Neutronics Scoping Studies for Experimental Fusion Devices journal May 2019
Access to pedestal pressure relevant to burning plasmas on the high magnetic field tokamak Alcator C-Mod journal September 2018
Integrated Tokamak modeling: When physics informs engineering and research planning journal May 2018
Compact steady-state tokamak performance dependence on magnet and core physics limits journal February 2019
Spatiotemporal evolution of runaway electrons from synchrotron images in Alcator C-Mod journal October 2018
Shielding materials in the compact spherical tokamak
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  • Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, Vol. 377, Issue 2141 https://doi.org/10.1098/rsta.2017.0443
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The dependence of divertor power sharing on magnetic flux balance in near double-null configurations on Alcator C-Mod journal May 2018
Observation of Efficient Lower Hybrid Current Drive at High Density in Diverted Plasmas on the Alcator C-Mod Tokamak journal August 2018
High-resolution heat flux width measurements at reactor-level magnetic fields and observation of a unified width scaling across confinement regimes in the Alcator C-Mod tokamak journal July 2018
Maximizing specific energy by breeding deuterium journal September 2019
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Radio-frequency current drive for thermonuclear fusion reactors journal July 2018
The effect of background flow shear on gyrokinetic turbulence in the cold ion limit journal April 2019
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Dipole Magnets Above 20 Tesla: Research Needs for a Path via High-Temperature Superconducting REBCO Conductors journal November 2019
On the Use of High Magnetic Field in Reactor Grade Tokamaks journal August 2018
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On the size of tokamak fusion power plants journal February 2019
Exploration of a Fast Pathway to Nuclear Fusion: Thermal Analysis and Cooling Design Considerations for the ARC Reactor journal July 2019
Similarity of the coupled equations for RF waves in a tokamak journal January 2019
Summary of the FESAC Transformative Enabling Capabilities Panel Report journal March 2019
Influence of high magnetic field on access to stationary H-modes and pedestal characteristics in Alcator C-Mod journal February 2018
Performance assessment of long-legged tightly-baffled divertor geometries in the ARC reactor concept journal September 2019
Optimisation of confinement in a fusion reactor using a nonlinear turbulence model text January 2016
Spatiotemporal evolution of runaway electrons from synchrotron images in Alcator C-Mod text January 2018
The effect of background flow shear on gyrokinetic turbulence in the cold ion limit text January 2018
Maximizing specific energy by breeding deuterium text January 2019
ARC reactor materials: Activation analysis and optimization journal May 2020
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Alpha channeling with high-field launch of lower hybrid waves journal November 2015
Measurements of the Strain Dependence of Critical Current of Commercial REBCO Tapes at 15 T Between 4.2 and 40 K for High Field Magnets journal August 2019
Neutron diagnostics for the physics of a high-field, compact, $Q\geq1$ tokamak preprint January 2019
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