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Fusion Science and Technology
Latest News
Framatome signs contracts with Sizewell C
French nuclear developer Framatome is slated to deliver key equipment for Sizewell C Ltd.’s two large reactors planned for the United Kingdom’s Suffolk coast.
The agreement, reportedly worth multiple billions of euros, was announced this week and will involve Framatome from the design phase until commissioning. The company also agreed to a long-term fuel supply deal. Framatome is 80.5 percent owned by France’s EDF and 19.5 percent owned by Mitsubishi Heavy Industries.
Y. Oya, Y. Makide, K. Chiba, S. Tanaka, Y. Morimoto, H. Kodama, K. Okuno, T. Kawano, Y. Asakura, T. Uda
Fusion Science and Technology | Volume 44 | Number 2 | September 2003 | Pages 359-363
Technical Paper | Fusion Energy - Tritium and Safety and Environment | doi.org/10.13182/FST03-A360
Articles are hosted by Taylor and Francis Online.
To investigate the hydrogen behavior in/on the Stainless Steel (SS)-304, the deuterium or heavy water was sorbed on the sample by various methods, such as water adsorption, ion irradiation and electrolysis, and the chemical states of iron, chromium, nickel and oxygen were studied by means of X-ray photoelectron spectroscopy (XPS). It was found that the metal oxide and oxyhydroxide, FeOOD or CrOOD, were formed on the surface of SS-304. The oxyhydroxide was dominant on the surface of the sample charged by electrolysis. However, metal oxide was observed on the surface of SS-304 after D2O water adsorption. The thermal desorption spectroscopy (TDS) was also applied to the evaluation of the thermal desoprtion behaviors of D2 and D2O from SS-304. It was found that three peaks were found in the sample charged with electrolysis. Among them, two peaks were also observed in the sample with water adsorption. The first peak, which was only found in the sample charged with electrolysis, suggests the D2 and D2O release by the decomposition of oxyhydroxide, and the second peak was induced by the decomposition of hydroxide or aquo-iron complexes. The third deuterium release would be induced by the desorption of the dissociative absorbed deuterium. It was concluded that the existence and chemical form of oxygen influence the retention of deuterium on/in SS-304.
