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New Cryogenic Steels and Design Approach for ITER Superconducting Magnet System

[+] Author Affiliations
H. Nakajima, K. Hamada, K. Okuno, K. Hada, E. Tada

Japan Atomic Energy Research Institute, Ibaraki, Japan

Paper No. ICONE10-22674, pp. 591-598; 8 pages
doi:10.1115/ICONE10-22674
From:
  • 10th International Conference on Nuclear Engineering
  • 10th International Conference on Nuclear Engineering, Volume 4
  • Arlington, Virginia, USA, April 14–18, 2002
  • Conference Sponsors: Nuclear Engineering Division
  • ISBN: 0-7918-3598-7 | eISBN: 0-7918-3589-8
  • Copyright © 2002 by ASME

abstract

A new design code has been developed for construction and operation/maintenance of the International Thermonuclear Experimental Reactor (ITER). A superconducting magnet system is one of the key components of ITER and its design code includes new cryogenic materials and design approach with taking account of unique features of a performance of the superconducting magnet. The new materials are nitrogen strengthened austenitic stainless steels, which have a yield strength (Sy ) of over 1000 MPa and fracture toughness (KIc ) of over 200 MP√m at liquid helium temperature (4K). The feature of the design approach is use of the allowable stress defined by only 2/3 Sy measured at 4K. A concept and reliability of the new design approach using new cryogenic materials for the ITER superconducting magnet system are discussed in this paper.

Copyright © 2002 by ASME

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