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runs a major effort in blanket design and will test a number of potential solutions. Concepts for the breeder blanket include helium-cooled lithium lead (HCLL), helium-cooled pebble bed (HCPB), and water-cooled lithium lead (WCLL) methods. Six different tritium breeding systems, known as Test
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79:. However, tritium is not a naturally occurring resource, and thus is difficult to obtain in sufficient quantity to run a reactor through other means, so if commercial fusion using the D-T cycle is to be achieved, successful breeding of the tritium in commercial quantities is a requirement.
97:. These materials, mostly in a pebble form, are used to produce and extract tritium and helium; must withstand high mechanical and thermal loads; and should not become excessively radioactive upon completion of their useful service life.
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Of these three duties, it is only the breeding portion that cannot be replaced by other means. For instance, a large quantity of water makes an excellent cooling system and neutron shield, as in the case of a conventional
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in the blanket. The blanket may also act as a cooling mechanism, absorbing the energy from the neutrons produced by the reaction between
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To date no large-scale breeding system has been attempted, and it is an open question whether such a system is possible to create.
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reaction, which owing to the scarcity of tritium would not be available in sufficient quantities, through the reaction of
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187:"An Overview of the EU breeding blanket design strategy as an integral part of the DEMO design effort"
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Federici, G.; Boccaccini, L.; Cismondi, F.; Gasparotto, M.; Poitevin, Y.; Ricapito, I. (2019-04-01).
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133:"Thermal Discrete Element Analysis of EU Solid Breeder Blanket Subjected to Neutron Irradiation"
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Some breeding blanket designs are based on lithium containing ceramics, with a focus on
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