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2014_epr_talk_upload.pdf2014-08-14 17:38:17Derek Sutherland

The dynomak: An advanced spheromak reactor concept with imposed-dynamo current drive and next-generation nuclear power technologies

Author: Derek A. Sutherland
Requested Type: Consider for Invited
Submitted: 2014-05-28 14:44:14

Co-authors: T.R. Jarboe, K.D. Morgan, G. Marklin, B.A. Nelson

Contact Info:
University of Washington
AERB Room 120
Seattle, WA   98105-2
USA

Abstract Text:
A high-beta spheromak reactor concept called the dynomak has been formulated with an estimated overnight capital cost that is competitive with coal-fired power plants. This spheromak reactor concept utilizes recently discovered imposed-dynamo current drive (IDCD) and a molten salt (FLiBe) blanket system for first wall cooling, neutron moderation and tritium breeding. Currently available materials and ITER-developed cryogenic pumping systems were implemented in this concept from the basis of technological feasibility. A tritium breeding ratio (TBR) of greater than 1.1 has been calculated using a Monte Carlo N-Particle (MCNP5) neutron transport simulation. High temperature superconducting tapes (YBCO) were used for the equilibrium coil set, substantially reducing the recirculating power fraction when compared to previous spheromak reactor studies. Using zirconium hydride for neutron shielding, a limiting equilibrium coil lifetime of at least thirty full-power years has been achieved. The primary FLiBe loop was coupled to a supercritical carbon dioxide Brayton cycle due to attractive economics and high thermal efficiencies. With these advancements, an electrical output of 1000 MW from a thermal output of 2486 MW was achieved, yielding an overall plant efficiency of approximately 40%. The overnight capital cost of this 1 GWe power plant is estimated to be $2.7 billion USD. A complete development path towards a commercial IDCD-enabled spheromak reactor system has been formulated using modular upgrades of identically sized devices to minimize the cost of demonstrating electricity production from fusion power. The dynomak reactor study has been published in Fusion Engineering and Design, 89 (2014) 412-425, http://dx.doi.org/10.1016/j.fusengdes.2014.03.072.

Characterization: 4.0

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Workshop on Exploratory Topics in Plasma and Fusion Research (EPR) and US-Japan Compact Torus (CT) Workshop
August 5-8, 2014
Madison, Wisconsin

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