Hydrothermal Corrosion of Latest Generation of FeCrAl Alloys for Nuclear Fuel Cladding

After the Fukushima nuclear disaster, the nuclear materials community has been vastly investing in accident tolerant fuel (ATF) concepts to modify/replace Zircaloy cladding material. Iron-chromium-aluminum (FeCrAl) alloys are one of the leading contenders in this race. In this study, we investigated...

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Bibliographic Details
Published in:Materials 2024-04, Vol.17 (7), p.1633
Main Authors: Nagothi, Bhavani Sasank, Qu, Haozheng, Zhang, Wanming, Umretiya, Rajnikant V, Dolley, Evan, Rebak, Raul B
Format: Article
Language:English
Subjects:
Alloys
Building materials
Chemistry
Chromium
Claddings
Corrosion and anti-corrosives
Corrosion effects
Corrosion rate
Corrosion resistance
Discount coupons
Emission standards
Ferrous alloys
Hydrogen
Industrial plant emissions
Man made disasters
Nuclear accidents
Nuclear energy
Nuclear fuel elements
Nuclear industry
Nuclear power plants
Powder metallurgy
Specialty metals industry
Water chemistry
Zircaloys (trademark)
Zirconium alloys
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Summary:After the Fukushima nuclear disaster, the nuclear materials community has been vastly investing in accident tolerant fuel (ATF) concepts to modify/replace Zircaloy cladding material. Iron-chromium-aluminum (FeCrAl) alloys are one of the leading contenders in this race. In this study, we investigated FA-SMT (or APMT-2), PM-C26M, and Fe17Cr5.5Al over a time period of 6 months in simulated BWR environments and compared their performance with standard Zirc-2 and SS316 materials. Our results implied that water chemistry along with alloy chemistry has a profound effect on the corrosion rate of FeCrAl alloys. Apart from SS316 and Zirc-2 tube specimens, all FeCrAl alloys showed a mass loss in hydrogen water chemistry (HWC). FA-SMT displayed minimal mass loss compared to PM-C26M and Fe17Cr5.5Al because of its higher Cr content. The mass gain of FeCrAl alloys in normal water chemistry (NWC) is significantly less when compared to Zirc-2.
ISSN:1996-1944
1996-1944
DOI:10.3390/ma17071633