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Conference Spotlight
Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
Standards Program
The Standards Committee is responsible for the development and maintenance of voluntary consensus standards that address the design, analysis, and operation of components, systems, and facilities related to the application of nuclear science and technology. Find out What’s New, check out the Standards Store, or Get Involved today!
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A new ANSI/ANS standard for liquid metal fire protection published
ANSI/ANS-54.8-2025, Liquid Metal Fire Protection in LMR Plants, received approval from the American National Standards Institute on September 2 and is now available for purchase.
The 2025 edition is a reinvigoration of the withdrawn ANS-54.8-1988 of the same title. The Advanced Reactor Codes and Standards Collaborative (ARCSC) identified the need for a current version of the standard via an industry survey.
Typical liquid metal reactor designs use liquid sodium as the coolant for both the primary and intermediate heat-transport systems. In addition, liquid sodium and NaK (a mixture of sodium and potassium that is liquid at room temperature) are often used in auxiliary heat-removal systems. Since these liquid metals can react readily with oxygen, water, and other compounds, special precautions must be taken in the design, construction, testing, and maintenance of the sodium/NaK systems to ensure that the potential for leakage is very small.
David Burgreen
Nuclear Science and Engineering | Volume 12 | Number 2 | February 1962 | Pages 203-217
Technical Paper | doi.org/10.13182/NSE62-A26059
Articles are hosted by Taylor and Francis Online.
The purpose of this study is the determination of the dynamic movements and stresses in fuel structures when subjected to a rapid temperature pulse. The maximum expansion and stress produced in any of these elements is proportional to the magnitude of the temperature pulse, but also depends upon the ratio of the temperature pulse period to the natural period of oscillation. Parametric curves are plotted which show the dynamic expansions and stresses in these elements when they are subjected to temperature pulses of varying duration.
