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Design and Fabrication of Reactor Pressure Vessel for High Temperature Engineering Test Reactor (HTTR)

[+] Author Affiliations
Yukio Tachibana, Shigeaki Nakagawa, Tatsuo Iyoku

Japan Atomic Energy Research Institute, Oarai-machi, Ibaraki, Japan

Paper No. PVP2004-2257, pp. 39-44; 6 pages
  • ASME/JSME 2004 Pressure Vessels and Piping Conference
  • Elevated Temperature Design and Analysis, Nonlinear Analysis, and Plastic Components
  • San Diego, California, USA, July 25–29, 2004
  • Conference Sponsors: Pressure Vessels and Piping Division
  • ISBN: 0-7918-4667-9
  • Copyright © 2004 by ASME


The reactor pressure vessel (RPV) of the HTTR is 5.5 m in inside diameter, 13.2 m in inside height, and 122 mm and 160 mm in wall thickness of the body and the top head dome, respectively. Because the reactor inlet temperature of the HTTR is higher than that of LWRs, 2 1/4Cr-1Mo steel is chosen for the RPV material. Fluence of the RPV is estimated to be less than 1×1017 n/cm2 (E>1 MeV), and so irradiation embrittlement is presumed to be negligible, but temper embrittlement is not. For the purpose of reducing embrittlement, content of some elements is limited on 2 1/4 Cr-1 Mo steel for the RPV using embrittlement parameters, J-factor and X . In this paper design, fabrication procedure, and in-service inspection technique of the RPV for the HTTR are described.

Copyright © 2004 by ASME



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