Design and realization of prototype of plasma facing unit and thermal shields of fusion reactor
Author(s)
Maviglia, Fabio
Date Issued
June 28, 2019
Type
Doctoral Thesis
Abstract
Nuclear Fusion is one of the most promising and appealing research fields that could help to answer the increasing needs of clean energy. The operation of fusion power reactors will impose very demanding operation conditions on the Plasma Facing Components (PFCs). The PFCs will be operated in an environment which comprises incident particles and heat flux from the plasma. The surface of the plasmafacing material (PFM) is subjected to erosion by energetic ions and neutral atoms escaping from the plasma.PFC in DEMO consists in: an armour material facing the plasma in beryllium o tungsten; heat sink in copper to transfer the heat from the armour to the cooling channelsthat should have adequate thermal conductivity and good resistance to water corrosion.
This thesis work aims to contribute for the optimization of the monoblock thickness of the Plasma Facing Component (PFC) in DEMO Divertor.The thickness of the monoblocks chosen for the DEMO PFU is currently 4mm, while the ITER thickness is 12mm. To carry out this work it was decided to start from the geometry proposed by ENEA (ITER-like) with a thickness of 12 mm monoblocks.
The last part of the thesis work consists of a preliminary thermo-hydraulic analysis, in order to estimate the power requested by the cryogenic system.The thermal shield design is cooled by Helium which flows inside pipes welded on one side, internally to a box structure similar to the one of JT-60SA.
Additional information
Dottorato di ricerca in Ecosistemi e sistemi produttivi
Subjects
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fmaviglia_tesid.pdf
Size
4.38 MB
Format
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