Prevention of Nonductile Fracture in 6061-T6 Aluminum Nuclear Pressure Vessels

[+] Author and Article Information
G. T. Yahr

Engineering Technology Division, Oak Ridge National Laboratory, Martin Marietta Energy Research, Inc., P.O. Box 2009, Oak Ridge, TN 37831-8051

J. Pressure Vessel Technol 119(2), 150-156 (May 01, 1997) (7 pages) doi:10.1115/1.2842276 History: Received February 28, 1996; Revised May 03, 1996; Online February 11, 2008


The American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Committee has approved rules for the use of 6061-T6 and 6061-T651 aluminum for the construction of Class 1 welded nuclear pressure vessels for temperatures not exceeding 149°C (300°F). Nuclear Code Case N-519 will allow the use of this aluminum in the construction of low-temperature research reactors such as the Advanced Neutron Source. The rules for protection against nonductile fracture are discussed. The basis for a value of 25.3 MPam (23 ksi in.) for the critical or reference stress intensity factor for use in the fracture analysis is presented. Requirements for consideration of the effects of neutron irradiation on the fracture toughness are discussed.

Copyright © 1997 by The American Society of Mechanical Engineers
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