Thermohydraulic investigation on the use of carbon dioxide as coolant for a solid breeding blanket for DEMO

Caspari, Felix

Tesis de maestría:
Thermohydraulic investigation on the use of carbon dioxide as coolant for a solid breeding blanket for DEMO

dc.contributor.advisor	Boccaccini, Lorenzo V.
dc.contributor.advisor	Hernández González, Francisco A.
dc.contributor.advisor	Smoglie, Cecilia
dc.contributor.author	Caspari, Felix
dc.date.accessioned	2018-03-26T19:57:07Z
dc.date.available	2018-03-26T19:57:07Z
dc.date.issued	2017
dc.description.abstract	"The Helium Cooled Pebble Bed (HCPB) Breeding Blanket (BB) is one of the 4 BB concepts being investigated in the EU for their possible implementation in a demonstration nuclear fusion reactor (DEMO). The choice of He as fuid coolant for the BB is motivated by a virtually complete transparency to neutrons, leaving unafected the T production capabilities of the blanket, as well as chemical inertness, molecular stability under high temperatures and neutron irradiation and a superior heat conductivity and capacity, leading to the best cooling performance in terms of heat transfer capabilities among other gas cooling choices. However, this cooling performance figure is hindered by the very low density of the gas, which leads to large pressure drops and high pumping power, thus afecting the overall plant efficiency, as well as to chronic leakages and large coolant inventories. These disadvantages, together with the still immature technology readiness of the respective turbomachinery, the price of this coolant, as well as its recognized limited resources pose concerns about the use of He as coolant for a BB in DEMO. On the other side, carbon dioxide has been the fuid coolant choice since the 50's in the nuclear fission industry for gas cooled reactors (MAGNOX, AGR). Despite its lower heat capacity and thermal conductivity (about 22% and 17% of that of helium respectively), its larger density (11 times larger molecular weight for CO2) can lead to an advantageous performance on heat dissipation rate per unit of pumping power. This feature, coupled with its relative transparency to neutrons, the molecular stability at the operating temperatures of the BB and the industrial scale ready turbomachinery makes CO2 an attractive alternative to He. The feasibility of a CO2-cooled breeding blanket is assessed in this work from the point of view of the thermohydraulic performance."	en
dc.description.notes	Tesis Energía y Ambiente (maestría) - Instituto Tecnológico de Buenos Aires, Buenos Aires - Karlsruher Institut für Technologie, Karlsruhe, 2017	es
dc.identifier.uri	http://ri.itba.edu.ar/handle/123456789/1158
dc.language.iso	en	en
dc.subject	REACTORES NUCLEARES	es
dc.subject	TERMOHIDRAULICA	es
dc.subject	FUSION NUCLEAR	es
dc.subject	DIOXIDO DE CARBONO	es
dc.subject	FLUIDOS	es
dc.title	Thermohydraulic investigation on the use of carbon dioxide as coolant for a solid breeding blanket for DEMO	en
dc.type	Tesis de maestría	es
dspace.entity.type	Tesis de Maestría
itba.description.filiation	Fil: Caspari, Felix. Instituto Tecnológico de Buenos Aires; Argentina.
itba.description.filiation	Fil: Smoglie, Cecilia. Instituto Tecnológico de Buenos Aires; Argentina.
itba.description.filiation	Fil :Hernández González, Francisco A. Karlsruher Institut für Technologie; Alemania.
itba.description.filiation	Fil: Boccaccini, Lorenzo V. Karlsruher Institut für Technologie; Alemania.