Technical Review of the 2017 Edition of ASME Code, Section III, Division 5, "High Temperature Reactors" (NUREG-2245)

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Publication Information

Manuscript Completed: January 2023
Date Published: January 2023

Prepared by:
A. Yeshnik
J. Poehler
A. Tsirigotis
M. Gordon
A. Hull
E. Focht
S. Downey
M. Breach
K. Hsu
Y. Diaz-Castillo
R. Davis
R. Roche-Rivera
T. Lupold

Jordan Hoellman, NRC Project Manager

Office of Nuclear Reactor Regulation
U.S. Nuclear Regulatory Commission
Washington, DC 20555-0001

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This NUREG documents the U.S. Nuclear Regulatory Commission (NRC) staff's technical evaluation of the 2017 Edition of the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code (ASME Code), Section III, "Rules for Construction of Nuclear Facility Components," Division 5, "High Temperature Reactors," and select associated Code Cases for acceptability and endorsement. As of this writing, the absence of a code of construction endorsed by the NRC for nuclear reactors operating above 425 degrees Celsius (800 degrees Fahrenheit) is a significant obstacle for advanced non-light-water-reactor designs. Review of an elevated temperature code of construction during a licensing review of a new nuclear power plant would result in substantial cost and a longer schedule for the requested action. This report documents the NRC's technical review and findings that support its endorsement of ASME Code, Section III, Division 5.

Page Last Reviewed/Updated Tuesday, January 31, 2023