DESIGN STATUS OF THE CRYOGENIC SYSTEM AND OPERATION MODES ANALYSYS OF THE JT-60SA TOKAMAK

被引：5

作者：

Roussel, P. ^{[1
]}

Hoa, C. ^{[1
]}

Lamaison, V. ^{[2
]}

Michel, F. ^{[1
]}

Reynaud, P. ^{[2
]}

Wanner, M. ^{[3
]}

机构：

[1] CEA, INAC SBT, F-38054 Grenoble, France

[2] CEA, IRFM STEP, F-13108 St Paul Les Durance, France

[3] Fus Energy Broader Fus Dev Dept, D-85748 Garching, Germany

来源：

ADVANCES IN CRYOGENIC ENGINEERING, VOLS 55A AND 55B | 2010年 / 1218卷

关键词：

JT-60SA; pulsed heat load; cryoplant;

D O I：

10.1063/1.3422321

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The JT-60SA project is part of the Broader Approach Programme signed between Japan and Europe. This superconducting upgrade of the existing JT-60U tokamak in Naka, Japan shall start operation in 2016 and shall support ITER exploitation and research towards DEMO fusion reactor. JT-60SA is currently in the basic design phase. The cryogenic system of JT-60SA shall provide supercritical helium to cool the superconducting magnets and their structures at 4.4 K, and the divertor cryopumps at a temperature of 3.7 K. In addition it shall provide refrigeration for the thermal shields at 80 K and deliver helium at 50 K for the current leads. The equivalent refrigeration capacity at 4.5 K will be about 10 kW. The refrigeration process has to be optimised for different operation modes. During the day, in plasma operation state, the refrigerator will cope with the pulsed heat loads which may increase up to 100% of the average power, representing a big challenge compared to other tokamaks. Fast discharge quenches of the magnets, the impact from baking of the vacuum vessel, cool down and warm up modes are presented from the cryogenic system point of view and their impact on the cryogenic design is described.

引用

页码：1445 / +

页数：2

共 3 条

[1]

CHOROWSKI M, 1998, INT CRYOGENIC ENG C, V17, P755

[2]

Dauguet P, 2008, AIP CONF PROC, V985, P564

[3] Analysis of the ITER cryoplant operational modes [J].

Henry, D. ;

Journeaux, J. Y. ;

Roussel, P. ;

Michel, F. ;

Poncet, J. M. ;

Girard, A. ;

Kalinin, V. ;

Chesny, P. .

FUSION ENGINEERING AND DESIGN, 2007, 82 (5-14) :1454-1459

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