Microstructural characterization of annealed U-12Zr-4Pd and U-12Zr-4Pd-5Ln: Investigating Pd as a metallic fuel additive

被引：24

作者：

Benson, Michael T. ^{[1
]}

He, Lingfeng ^{[1
]}

King, James A. ^{[1
]}

Mariani, Robert D. ^{[1
]}

机构：

[1] Idaho Natl Lab, POB 1625,MS 6188, Idaho Falls, ID 83415 USA

来源：

JOURNAL OF NUCLEAR MATERIALS | 2018年 / 502卷

关键词：

FCCI; Metallic fuel; Fuel additive; CLADDING CHEMICAL INTERACTION; DIFFUSION COUPLES; GAMMA-PHASE; ZR ALLOYS; AS-CAST; URANIUM; DECOMPOSITION; LANTHANIDES; REDUCTION; PALLADIUM;

D O I：

10.1016/j.jnucmat.2018.02.012

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Palladium is being investigated as a potential additive to metallic fuel to control fuel-cladding chemical interaction (FCCI). A primary cause of FCCI is the lanthanide fission products moving to the fuel periphery and interacting with the cladding. This interaction will lead to wastage of the cladding and, given enough time or burn-up, eventually to a cladding breach. The current study is a scanning electron microscopy (SEM) and transmission electron microscopy (TEM) characterization of annealed U-12Zr-4Pd and U-12Zr4Pd-5Ln, where Ln = 53Nd-25Ce-16Pr-6La. The present study shows that Pd preferentially binds the lanthanides over other fuel constituents, which may prevent lanthanide migration and interaction with the cladding during irradiation. The SEM analysis indicates the 1: 1 Pd-Ln compound is being formed, while the TEM analysis, due to higher resolution, found the 1: 1 compound, as well as Pd-rich compounds Pd(2)Ln and Pd(3)Ln(2). (c) 2018 Elsevier B.V. All rights reserved.

引用

页码：106 / 112

页数：7

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