Journal
JOURNAL OF NUCLEAR MATERIALS
Volume 578, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jnucmat.2023.154357
Keywords
Arc Ion Plating; CrAl; Accident tolerant fuel cladding; AFT cladding; CRUD; PWR
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In addition to oxidation resistance, improvement of corrosion resistance is important in the development of accident tolerant fuel after the Fukushima accident. Crud deposition on fuel assembly leads to problems such as power shift and accelerated corrosion, which can result in fuel failure. In this study, an uncoated Zircaloy-4 cladding and a CrAl-coated Zircaloy-4 cladding were tested in simulated PWR water. The CrAl coating effectively reduces crud adhesion and thickness, as indicated by the morphology and chemical characteristics of the crud.
In addition to oxidation resistance, an improvement of corrosion resistance is another important issue in the accident tolerant fuel development emerged after Fukushima accident. Crud deposited on fuel assembly induces undesired problems such as power shift, accelerated corroion of claddings which can ultimately results in fuel failure. In this study, an uncoated Zircaloy-4 cladding and a CrAl-coated Zircaloy-4 cladding are tested in simulated PWR water. In a CrAl-coated cladding crud adhesion is significantly reduced, along with reduction of crud thickness. Morphology and chemical characteristics of crud indicate that CrAl coating effectively works on reduction of crud deposition.(c) 2023 Elsevier B.V. All rights reserved.
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