Activation and decay heat analysis of the European DEMO blanket concepts

• DOI: 10.1016/j.fusengdes.2017.02.100
• Publication Date: 2017-03-18T04:45:25Z
• Authors: T. Eade; M. Garcia; R. Garcia; F. Ogando; P. Pereslavtsev; J. Sanz; G. Stankunas; A. Travleev
• Keywords: Decay heat; Breeder (animal); Nuclide; Fusion power

Demonstrating tritium self-sufficiency is an important goal of the European tokamak demonstration fusion reactor. Currently four breeder blanket concepts are being considered: Helium Cooled Pebble Bed (HCPB), Lithium-Lead (HCLL), Dual (DCLL) and Water (WCLL). Differences in materials construction lead to differing nuclear responses. As well as affecting breeding this also particular importance safety analyses, such modelling loss coolant accidents, it affects blanket's decay heat nuclide inventory. This paper presents discusses analysis performed for each 2014 designs ascertain inventory entire It was found that total at short times HCLL concept (17.5 MW 1 s) between 17% 22% lower than HCPB, WCLL DCLL. At longer (∼100 years) DCLL blankets had heats region 2–3 orders magnitude above HCPB blankets. The differences noted discussed terms neutron spectrum material composition.