Design and feasibility of a pumping concept based on tritium direct recycling

• DOI: 10.1016/j.fusengdes.2021.112969
• Publication Date: 2021-12-28T22:45:59Z
• Authors: T. Haertl; C. Day; T. Giegerich; S. Hanke; V. Hauer; Y. Kathage; J. Lilburne; W. Morris; S. Tosti
• Keywords: Conceptual design; Cryopump

In the DEMO Pre-Concept Design Phase, a novel fuel cycle architecture has been developed that aims at reducing tritium inventory of plant. contrast to previous designs, central role thereby is taken by an additional direct internal recycling loop. By already separating significant proportion pumping duct and providing this purified gas almost directly injection systems, load on plant as well overall reduced substantially. This paper summarizes activities conducted in regard integration presents results (aka key design issues) for feasibility concept based recycling. The focus aspects such separation function with main technologies involved. functional position foreseen, these environment conditions mainly are space constraints, strong magnetic field, limited amount restrictions occupation suitable ports. Two technical implementations have identified: A metal foil pump relying physical phenomena superpermeation hydrogen through membrane able provide continuous transfer. multi-stage cryopump utilizing specific cryogenic trapping several stages. Relying binding, it only can operate intermittently. Within activity, variants specifically reviewed their suitability also criteria future down selection.