Plasma and Fusion Research
Volume 19, 1205007 (2024)
Rapid Communications
- National Institutes for Quantum Science and Technology, Rokkasho, Aomori 039-3212, Japan
Abstract
The water-cooled ceramic breeder system is the leading choice for research and development in Japan's ITER and DEMO blankets. This type of blanket uses reduced activation ferritic/martensitic (RAFM) steel as structural material in the flow of the high-temperature and high-pressure water as coolant. There is however insufficient information regarding corrosion under fusion reactor operating conditions despite previous water chemistry and environmental strength evaluations. In particular, there are no specific studies of the effects of strong magnetic fields on corrosion behavior. Therefore, it is of great engineering importance to clarify the influence of magnetic fields on the corrosion of RAFM since the RAFM itself shows inherent ferromagnetic characteristics. In this study, we investigated whether a magnetic field affects the corrosion of Japanese RAFM steel, i.e., F82H, in high-temperature and high-pressure water. The results showed that 1.3 T of the magnetic field made no difference in the thickness of the inner oxide, but a difference in the size of the oxide particles on the surface.
Keywords
reduced activation ferritic/martensitic steel, high-temperature water corrosion, magnetic field, activated corrosion product, in-vessel component
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References
- [1] Y. Kawamura et al., Fusion Eng. Des. 136, 1550 (2018).
- [2] M. Nakajima et al., J. Plasma Fusion Res. SERIES 11, 69 (2015).
- [3] M. Nakajima et al., Fusion Eng. Des. 146, 1912 (2019).
- [4] T. Hirose et al., J. Nucl. Mater. 367-370, 1185 (2007).
- [5] Y. Miwa et al., J. Nucl. Mater. 386-388, 703 (2009).
- [6] W. Guan et al., Fusion Eng. Des. 155, 111719 (2020).
- [7] A. Sato, Hyomen Kagaku 20, 758 (1999).
- [8] R. Sueptitz et al., Corrosion Science 53, 3222 (2011).
- [9] Z. Lu et al., Corrosion Science 47, 1471 (2005).
- [10] H. Sakasegawa et al., Fusion Eng. Des. 98-99, 2068 (2015).