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Conference Spotlight
Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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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The 2025 edition is a reinvigoration of the withdrawn ANS-54.8-1988 of the same title.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.
O. O. Yarbro, J. L. English, T. S. Mackey
Nuclear Science and Engineering | Volume 17 | Number 3 | November 1963 | Pages 492-497
Technical Paper | doi.org/10.13182/NSE63-A17404
Articles are hosted by Taylor and Francis Online.
Target rods irradiated in the High Flux Isotope Reactor will be chemically processed for the recovery and decontamination of the various actinide elements produced in the reactor. The processing equipment will be located in four of the nine cubicles and seven tank pits of the Transuranium Processing Plant cell bank. Activity and contamination levels in the process equipment necessitate the use of remote or semiremote maintenance techniques. Maintenance and plant modifications are simplified by a remotely operated piping disconnect developed for this purpose. The choice of materials of construction for the process equipment and piping is limited by the hydrochloric acid environment and intense radioactivity of the process solutions. Hastelloy C appears to be acceptable for low temperature waste service, while only tantalum, Zircaloy-2, or glass is suitable for process equipment.