Extent of tritium contamination of cryogenic helium circuit in a fusion reactor: Mechanism and probable scenarios

作者: Vinit Shukla , Vikas J. Lakhera , B. Sarkar

DOI: 10.1016/J.FUSENGDES.2019.05.014

关键词: HeliumNuclear engineeringCryogenic nitrogen plantFusion powerContaminationEnvironmental sciencePartial pressureTritium

摘要: Abstract The threat to cryogenic plant safety can be dependent on the extent of tritium contamination in helium circuit. There are some scenarios such as regeneration cryopumps at high temperature e.g. 300 K and 470 K where handshake with helium. upstream partial pressure dependency permeation predicted this paper. It has been found that is dominant temperatures over 300 K. results also show for 100 K there no possibility However, cycles higher i.e. a serious threat, considering or incomplete regeneration. predict 60% more efficient (which easily achievable) safe complete cycles. But, breach cap 0.2 G Bq/annum 5.6 × 10-7 gm/annum, even 11.2 mPa will take only 8 limit paper defines allowable regenerations required avoid any

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