Corrosion behaviour of FeCrAl-ODS steels in nitric acid solutions with several temperatures

Takahatake, Yoko ; Ambai, Hiromu ; Sano, Yuichi ; Takeuchi, Masayuki ; Koizumi, Kenji ; Sakamoto, Kan*; Yamashita, Shinichiro

The corrosion behaviour of FeCrAl-ODS steels for the accident tolerant fuel cladding of LWRs were investigated in nitric acid solutions for the reprocessing process of spent fuels. The corrosion tests were carried out at 60 $^{circ}$ C, 80 $^{circ}$ C and the boiling point of the solutions, and the specimens were then analysed by XPS. The corrosion remarkably progressed at the boiling point, and the highest corrosion rate was 0.22 mm/y. In the oxide film, the atomic concentration of Fe was lower, than that in the base material, and those of Cr and Al were higher. The results show that the corrosion of FeCrAl-ODS steels in hot nitric acid solution is not severe because of the high corrosion resistance of the oxide film formed on the material; hence, the corrosion resistance of the new cladding materials in the dissolution process of spent fuel is acceptable for reprocessing operations.

Language	:	English
Journal	:	Proceedings of Annual Topical Meeting on Reactor Fuel Performance (TopFuel 2018) (Internet)
Volume	:
Number	:
Pages	:	9 Pages
Publication Year/Month	:	2018/10
Meeting title	:	Annual Topical Meeting on Reactor Fuel Performance (TopFuel 2018)
Held date	:	2018/09
Location (city)	:	Prague
Location (country)	:	Czech Republic
Patent information	:
PDF	:
Paper URL	:	https://euronuclear.org/events/topfuel/topfuel2018/fullpapers/TopFuel2018-A0080-fullpaper.pdf
DOI for research data	:	Link to research data related to this paper/report.
Keywords	:	ATF; fuel cladding; FeCrAl-ODS; corrosion; nitric acid solution; temperature
Research Facility	:
Press Release	:
Article of JAEA R&D Review	:	Investigation of Fuel-Cladding Materials for the Reprocessing of Spent Nuclear Fuel; Evaluation of the Nitric Acid Resistance of New Materials Preventing Severe-Accident Progression[/]
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Registration No. : BB20180705
JAEA Abstracts No. : 47000932
Paper Submission No. : 21571

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