Microstructural characterization of as-cast U-20Pu-10Zr-3.86Pd and U-20Pu-10Zr-3.86Pd-4.3Ln

Benson, Michael T.; He, Lingfeng; King, James A.; Mariani, Robert D.; Winston, Alexander J.; Madden, James W.

doi:10.1016/j.jnucmat.2018.05.062

Title: Microstructural characterization of as-cast U-20Pu-10Zr-3.86Pd and U-20Pu-10Zr-3.86Pd-4.3Ln

Abstract

Palladium is being investigated as a potential additive to metallic fuel to bind fission product lanthanides, with the goal of reducing or preventing fuel-cladding chemical interactions (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 eventually to a cladding breach. The current study is a scanning electron microscopy (SEM) and transmission electron microscopy (TEM) investigation of as-cast U-20Pu-10Zr-3.86Pd and U-20Pu-10Zr-3.86Pd-4.3Ln in wt%, where Ln = 53Nd-25Ce-16Pr-6La. In U-20Pu-10Zr-3.86Pd, PdZr2 is forming, along with a possible ternary phase between Pu, Zr, and Pd. Pu is also present in the Pd-Ln precipitates formed in U-20Pu-10Zr-3.86Pd-4.3Ln. In the LnPd phase, Pu appears to be substitutional, forming (Ln,Pu)Pd. The other prominent phase, which appears to be Ln7Pd3, has a fine, lamellar structure. As a result, the lanthanides remain essentially constant across this fine structure, but Pu and Pd alternate as to which has the higher concentration.

Authors:

^[1];

^[1]; Winston, Alexander J. ^[1];

^[1]

Idaho National Lab. (INL), Idaho Falls, ID (United States)

Publication Date:: Tue May 29 00:00:00 EDT 2018

Research Org.:: Idaho National Lab. (INL), Idaho Falls, ID (United States)

Sponsoring Org.:: USDOE Office of Nuclear Energy (NE)

OSTI Identifier:: 1478245

Report Number(s):: INL/JOU-18-44698-Rev000
Journal ID: ISSN 0022-3115

Grant/Contract Number:: AC07-05ID14517

Resource Type:: Accepted Manuscript

Journal Name:: Journal of Nuclear Materials

Additional Journal Information:: Journal Volume: 508; Journal Issue: C; Journal ID: ISSN 0022-3115

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

Subject:: 11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 36 MATERIALS SCIENCE; metallic fuel; FCCI; fuel additive; transmutation fuel

Citation Formats


                    Benson, Michael T., He, Lingfeng, King, James A., Mariani, Robert D., Winston, Alexander J., and Madden, James W. Microstructural characterization of as-cast U-20Pu-10Zr-3.86Pd and U-20Pu-10Zr-3.86Pd-4.3Ln.  United States: N. p., 2018. 
Web.  doi:10.1016/j.jnucmat.2018.05.062.

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                    Benson, Michael T., He, Lingfeng, King, James A., Mariani, Robert D., Winston, Alexander J., & Madden, James W. Microstructural characterization of as-cast U-20Pu-10Zr-3.86Pd and U-20Pu-10Zr-3.86Pd-4.3Ln.  United States.  https://doi.org/10.1016/j.jnucmat.2018.05.062

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                    Benson, Michael T., He, Lingfeng, King, James A., Mariani, Robert D., Winston, Alexander J., and Madden, James W. Tue .  
"Microstructural characterization of as-cast U-20Pu-10Zr-3.86Pd and U-20Pu-10Zr-3.86Pd-4.3Ln".  United States.  https://doi.org/10.1016/j.jnucmat.2018.05.062.  https://www.osti.gov/servlets/purl/1478245.

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@article{osti_1478245,

  title        = {Microstructural characterization of as-cast U-20Pu-10Zr-3.86Pd and U-20Pu-10Zr-3.86Pd-4.3Ln},

  author       = {Benson, Michael T. and He, Lingfeng and King, James A. and Mariani, Robert D. and Winston, Alexander J. and Madden, James W.},

  abstractNote = {Palladium is being investigated as a potential additive to metallic fuel to bind fission product lanthanides, with the goal of reducing or preventing fuel-cladding chemical interactions (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 eventually to a cladding breach. The current study is a scanning electron microscopy (SEM) and transmission electron microscopy (TEM) investigation of as-cast U-20Pu-10Zr-3.86Pd and U-20Pu-10Zr-3.86Pd-4.3Ln in wt%, where Ln = 53Nd-25Ce-16Pr-6La. In U-20Pu-10Zr-3.86Pd, PdZr2 is forming, along with a possible ternary phase between Pu, Zr, and Pd. Pu is also present in the Pd-Ln precipitates formed in U-20Pu-10Zr-3.86Pd-4.3Ln. In the LnPd phase, Pu appears to be substitutional, forming (Ln,Pu)Pd. The other prominent phase, which appears to be Ln7Pd3, has a fine, lamellar structure. As a result, the lanthanides remain essentially constant across this fine structure, but Pu and Pd alternate as to which has the higher concentration.},

  doi          = {10.1016/j.jnucmat.2018.05.062},

  journal      = {Journal of Nuclear Materials},

  number       = C,

  volume       = 508,

  place        = {United States},

  year         = {Tue May 29 00:00:00 EDT 2018},

  month        = {Tue May 29 00:00:00 EDT 2018}

}

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