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2025 ANS Winter Conference & Expo
November 9–12, 2025
Washington, DC|Washington Hilton
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The current status of heat pipe R&D
Idaho National Laboratory under the Department of Energy–sponsored Microreactor Program recently conducted a comprehensive phenomena identification and ranking table (PIRT) exercise aimed at advancing heat pipe technology for microreactor applications.
Carlos Ruiz, Carlos Rinaldi
Nuclear Technology | Volume 198 | Number 3 | June 2017 | Pages 319-326
Technical Paper | doi.org/10.1080/00295450.2017.1297170
Articles are hosted by Taylor and Francis Online.
This work presents the effects that produce the change in entropy during separation processes; it takes into account the dilution of UF6 in a carrier gas (H2, He, N2, Ar, Xe, SF6, etc.). Comparisons were made between two technologies: one a mature process currently used, i.e., centrifugation (process A), and the other in development, i.e., processes based on a laser [Condensation Repression Isotope Separation by Laser (CRISLA), Molecular Laser Isotope Separation (MLIS), etc.] (process B). The calculations were made using the principles of mix thermodynamics. The results indicate that entropy expenditure is two orders of magnitude higher than that necessary to separate isotopes when the amount (of isotopes) is the same in both process A and process B.