Plasma and Fusion Research
Online ISSN : 1880-6821
ISSN-L : 1880-6821
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Key Aspects of the Safety Study of a Water-Cooled Fusion DEMO Reactor
Makoto NAKAMURAKenji TOBITAYouji SOMEYAHisashi TANIGAWAWerner GULDENYoshiteru SAKAMOTOTakao ARAKIKazuhito WATANABEHisato MATSUMIYAKyoko ISHIIHiroyasu UTOHHaruhiko TAKASETakumi HAYASHIAkira SATOUTaisuke YONOMOTOGianfranco FEDERICIKunihiko OKANO
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2014 Volume 9 Pages 1405139

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Abstract

Key aspects of the safety study of a water-cooled fusion DEMO reactor is reported. Safety requirements, dose target, DEMO plant model and confinement strategy of the safety study are briefly introduced. The internal hazard of a water-cooled DEMO, i.e. identification of hazardous inventories, identification of stored energies that can mobilize these hazardous inventories and identification of accident initiators and scenarios, are evaluated. It is pointed out that the enthalpy in the first wall/blanket cooling loops, the decay heat and the energy potentially released by the Be-steam chemical reaction are of special concern for the water-cooled DEMO. An ex-vessel loss-of-coolant accident (ex-VV LOCA) of the first wall/blanket cooling loop is also quantitatively analyzed. The integrity of the building against the ex-VV LOCA is discussed.

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© 2014 by The Japan Society of Plasma Science and Nuclear Fusion Research
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