Manufacturing and installation of the JT-60SA helium storage vessels for the cryogenic plant
| Autor: | Kyohei Natsume, Carmela Annino, Luigi Semeraro, N. Hajnal, Valerio Tomarchio, A.C.A. Figueiredo, Kaname Kizu, M. Wanner, Antonino Cardella, Joao Silva, Yoshihiko Koide, Enrico Di Pietro, Frederic Michel, Jorge Batista da Cruz |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Tokamak Mechanical Engineering Nuclear engineering chemistry.chemical_element Flange Cooling capacity 01 natural sciences Pressure vessel 010305 fluids & plasmas Diffuser (thermodynamics) law.invention Nuclear Energy and Engineering Volume (thermodynamics) Cryogenic nitrogen plant chemistry law 0103 physical sciences General Materials Science 010306 general physics Helium Civil and Structural Engineering |
| Zdroj: | Fusion Engineering and Design. (124):600-604 |
| Popis: | The JT-60SA Tokamak is provided with a cryogenic system with a refrigeration capacity of 9 kW (eqv.) at 4.5 K. Before commissioning and during occasional warm-up periods the total 3.6 t helium inventory (at ∼1.5 Mpa(g)) is stored in six pressure vessels. Each vessel is 22 m long, has a diameter of 4 m, 250 m3 volume, and weighs about 73 t. As the vessels will store pure helium, the tightness and cleanliness requirements were quite demanding. One of the vessels is also used to receive the cold helium (20 K) from the cryogenic system quench line, following a fast discharge of the superconducting coils. A special 18 m long helium diffuser system and a thermal barrier connector at the quench line flange have been designed and manufactured to avoid local chilling of the vessel wall below the minimum allowed temperature of the material. |
| Databáze: | OpenAIRE |
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