Fig. 2-11

The basic concept of ITER and its major design features

(design specifications as of January 1994, the Outline Design)

plasma major radius 7.7 m plasma half-width at 3.0 m midplane   elongation 1.6 plasma current 24 MA toroidal field 4.8 T burn time 1000 s fusion power 1500 MW

Table 2-2

Outline of the ITER EDA

term 6 years beginning July 1992 design activities 1340 man. year throughout the term Joint Central Team 840 man. year Home Teams 500 man . year R&D activities ¥engineering R&D ¥physics R&D Total amount of 750 Million $ equivalent (shared equally among the four participants, EU, Japan, RF and USA) Perform the following R&D items; superconducting coil, reactor structure and remote maintenance, current drive and heating, blanket and shield, first wall and divertor (plasma-facing components), fuel processing and plasma diagnostics Voluntary contribution on the basis of participant's own domestic program. Contribution from JT-60 eagerly expected.

The International Thermonuclear Experimental Reactor project is a research and development project aiming at the tokamak-type fusion experimental reactor under a large-scale international collaboration. The experimental fusion reactor is positioned in-between the present-day large tokamak experiments such as JT-60 and a demonstration reactor to be dedicated to a full-scale demonstration of a fusion power plant as previously shown in Fig. 2-3. The project is in the phase of the Engineering Design Activities (EDA) involving a cooperation of the European Union, Japan, the Russian Federation and the United States of America under the auspices of the International Atomic Energy Agency (IAEA). In Table 2-2 an outline of the ITER EDA is summarized The objectives of the ITER project are to demonstrate controlled ignition and extended burn of deuterium-tritium plasmas, and to develop and demonstrate technologies essential to a reactor in an integrated system, such as superconducting coils, blanket, plasma-facing components, remote operation and maintenance and others, and to perform integrated systems testing required to utilize fusion energy for practical purposes. Major activities of the EDA consist of the engineering design of ITER being done mainly by the international design team (the Joint Central Team), the engineering R&D on key technologies and the physics R&D shared among the four partners to the agreement as shown in Table 2-2. The international design teams are sited at three design work sites, Naka (Japan), Garching (Germany) and San Diego (USA). Figure 2-11 illustrates the ITER concept of the January 1994 Outline Design. The detailed design on the basis of this concept is now being carried out intensively. The ITER EDA will be completed in the middle of 1998.

Reference A. Kitsunezaki, International Thermonuclear Fusion Experimental Reactor "ITER", OHM 1994 (11), p.76-81.

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