Compact reversed shear tokamak reactor with a superheated steam cycle

Abstract

The compact reversed shear tokamak CREST is a cost competitive reactor concept based on a reversed shear high β plasma and water cooled ferritic steel components. The moderate aspect ratio A = 3.4 and the elongation κ = 2.0 of CREST are very similar to the case of the ITER advanced mode plasma. Presentation of such a concept based on the ITER project should be worth while for formulating a fusion development strategy. The achievement of a competitive cost of electricity (COE) is the first priority for electric power industries. High β and high thermal efficiency are the most effective parameters for achieving a competitive COE. In order to achieve a high efficiency power plant, a superheated steam cycle has been adopted which permits a high thermal efficiency (η = 41%). Current profile control and high speed plasma rotation by neutral beam current drive stabilize the ideal MHD activity up to the Troyon coefficient βN = 5.5. A cost assessment has shown that CREST could generate about 1.16 GW(e) electric power at a competitive cost.

Evolution of the ITER program and prospect for the next-step fusion DEMO reactors: status of the fusion energy R&D as ultimate source of energy

“…The high magnetic field approach was adopted in the design of A-SSTR [34], A-SSTR-2 [35], DEMO-2001 [36], where B max is 23 T in the case of A-SSTR-2. The other high β N approach was taken in the design of reactors such as CREST [37], ARIES-AT [38], and PPCS Model-D [39]. The magnetic field at the plasma is less than about 6 T [which means that the maximum field at the coil (B max ) is less than about 13T].…”

Socio-Economic Aspects of the Use of Structural Materals Critical for Development of Fusion Power Engineering. Vanadium Alloys

“…Электрич. мощ-ность (нетто), МВт Конструкционный материал Бридер Теплоноситель США ARIES-RS [7] 2167 1000 V-4Cr-4Ti Li Li ARIES-IV [8] 1000 [12] 5000 2550 SiC, композит He (10 MPa) CREST [13] 2970 1163 Ферритная сталь Li 2 ZrO 3 Вода DREAM [14] 1500 SiC/SiC He Данные, собранные в табл. 1, показывают, что только три проекта, разрабатываемые в США, Европе и России (ARIAS-RS, Модель-1, ДЕМО-С), из 15 представленных предполагают использовать в качестве конструкционных материалов бланкета ванадиевые сплавы.…”

Design studies of innovatively small fusion reactor based on biomass-fusion hybrid concept: GNOME

“…Many fusion DEMO and commercial plant designs have been proposed [1][2][3][4][5]. Most of these designs target 3 GW fusion power with Q ≥ 20 assuming an electricity conversion efficiency limited by the thermal cycle, typically ∼33% with water.…”