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Organized to promote the advancement of knowledge in the use of nuclear science and technologies in the aerospace application. Specialized nuclear-based technologies and applications are needed to advance the state-of-the-art in aerospace design, engineering and operations to explore planetary bodies in our solar system and beyond, plus enhance the safety of air travel, especially high speed air travel. Areas of interest will include but are not limited to the creation of nuclear-based power and propulsion systems, multifunctional materials to protect humans and electronic components from atmospheric, space, and nuclear power system radiation, human factor strategies for the safety and reliable operation of nuclear power and propulsion plants by non-specialized personnel and more.
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Norway’s Halden reactor takes first step toward decommissioning
The government of Norway has granted the transfer of the Halden research reactor from the Institute for Energy Technology (IFE) to the state agency Norwegian Nuclear Decommissioning (NND). The 25-MWt Halden boiling water reactor operated from 1958 to 2018 and was used in the research of nuclear fuel, reactor internals, plant procedures and monitoring, and human factors.
Josef Schaefer, Detlev Stöver, Rudolf Hecker
Nuclear Technology | Volume 66 | Number 3 | September 1984 | Pages 537-549
F. Hydrogen and Tritium Permeation | Status of Metallic Materials Development for Application in Advanced High-Temperature Gas-Cooled Reactor / Material | doi.org/10.13182/NT84-A33476
Articles are hosted by Taylor and Francis Online.
The phenomenon of hydrogen permeation through high-temperature alloys has been recognized as an important problem in developing nuclear energy production systems. Investigations are concerned with experimental techniques and requirements to conform with the concept of practical development. After establishing the data of hydrogen permeation through bare alloys, efforts are directed toward investigating the permeation behavior of surface oxidized walls. In this way 12 alloy types are examined under various conditions. The reduced penetration occurring under “process gas” atmosphere is determined by the “impeding factor”: It is the ratio of permeation rates measured under special conditions in the case of bare alloy annealed in pure hydrogen and in the case of its oxidized surface. One influence on the permeation behavior is proceeding from the metallic substrate of oxide coating: Centricast and wrought types of alloys are effective in different ways. Varied treatment before coating was significant only in the case of annealing in hydrogen. Most influential is the temperature acting upon both the permeating and the coating quality in a compensating manner. Temperature cycling in oxidizing atmosphere points to improved impeding. The relationship between the oxidation potential and the impeding conditions is not yet clear. In the temperature range between 650 and 900°C, a square root behavior below ∼5-bar hydrogen pressure is dominant, whereas a linear pressure dependence was detected above. A crossover range is obvious, especially distinct at higher temperatures. The influence of chromium oxide in the corrosion cover is manifested by metallurgical postexamination results corresponding with permeation data of selected samples.