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Conference Spotlight
2025 ANS Winter Conference & Expo
November 9–12, 2025
Washington, DC|Washington Hilton
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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High temperature fission chambers engineered for AMR/SMR safety and performance
As the global energy landscape shifts towards safer, smaller, and more flexible nuclear power, Small Modular Reactors (SMRs) and Gen. IV* technologies are at the forefront of innovation. These advanced designs pose new challenges in size, efficiency, and operating environment that traditional instrumentation and control solutions aren’t always designed to handle.
Gottfried Class, Klaus Hain, Rainer Meyder
Nuclear Technology | Volume 69 | Number 1 | April 1985 | Pages 72-81
Technical Paper | Heat Transfer and Fluid Flow | doi.org/10.13182/NT85-A33596
Articles are hosted by Taylor and Francis Online.
Thermocouples (TCs) spot welded on a surface, in two-phase flow, may rewet much sooner than the surrounding surface; they even may act as promoters for rewetting. In some loss-of-flow-test experiments, such spot-welded TCs are used to measure the cladding surface temperature of the fuel rods. Tests in the controlled blowdown simulation facility Karlsruhe (COSIMA) were performed using fuel rod simulators with and without such TCs. The cladding surface temperatures measured with the COSIMA pyrometers were compared, and it was concluded that the influence of the TCs cannot be neglected.
