Microstructural Changes and Chemical Analysis of Fission Products in Irradiated Uranium-7 wt.% Molybdenum Metallic Fuel Using Atom Probe Tomography

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Microstructural Changes and Chemical Analysis of Fission Products in Irradiated Uranium-7 wt.% Molybdenum Metallic Fuel Using Atom Probe Tomography. / Bachhav, Mukesh; Miller, Brandon D.; Gan, Jian; Keiser, Dennis D.; Leenaers, Ann; Van den Berghe, Sven; Meyer, Mitchell K.

In: Applied Sciences, Vol. 11, 6905, 07.2021, p. 1-12.

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Bachhav, Mukesh ; Miller, Brandon D. ; Gan, Jian ; Keiser, Dennis D. ; Leenaers, Ann ; Van den Berghe, Sven ; Meyer, Mitchell K. / Microstructural Changes and Chemical Analysis of Fission Products in Irradiated Uranium-7 wt.% Molybdenum Metallic Fuel Using Atom Probe Tomography. In: Applied Sciences. 2021 ; Vol. 11. pp. 1-12.

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@article{accabbdae61b4c21ae64f9c0988316cf,
title = "Microstructural Changes and Chemical Analysis of Fission Products in Irradiated Uranium-7 wt.% Molybdenum Metallic Fuel Using Atom Probe Tomography",
abstract = "Understanding the microstructural and phase changes occurring during irradiation and their impact on metallic fuel behavior is integral to research and development of nuclear fuel programs. This paper reports systematic analysis of as-fabricated and irradiated low-enriched U-Mo (uranium-molybdenum metal alloy) fuel using atom probe tomography (APT). This study is carried out on U-7 wt.% Mo fuel particles coated with a ZrN layer contained within an Al matrix during irradiation. The dispersion fuel plates from which the fuel samples were extracted are irradiated at Belgian Nuclear Research Centre (SCK CEN) with burn-up of 52% and 66% in the framework of the SELENIUM (Surface Engineering of Low ENrIched Uranium-Molybdenum) project. The APT studies on U-Mo particles from as-fabricated fuel plates enriched to 19.8% revealed predominantly -phase U-Mo, along with a network of the cell boundary decorated with -U, {\textquoteright}-U2Mo, and UC precipitates along the grain boundaries. The corresponding APT characterization of irradiated fuel samples showed formation of fission gas bubbles enriched with solid fission products. The intermediate burnup sample showed a uniform distribution of the typical bubble superlattice with a radius of2 nm arranged in a regular lattice, while the high burnup sample showed a non-uniform distribution of bubbles in grain-refined regions. There was no evidence of remnant -U, {\textquoteright}-U2Mo, and UC phases in the irradiated U-7 wt.% Mo samples.",
keywords = "Atom probe tomography, Nuclear fuel, Microstructure, Burnup, Enrichment, Uranium, Fission products",
author = "Mukesh Bachhav and Miller, {Brandon D.} and Jian Gan and Keiser, {Dennis D.} and Ann Leenaers and {Van den Berghe}, Sven and Meyer, {Mitchell K.}",
note = "Score=10",
year = "2021",
month = jul,
doi = "10.3390/app11156905",
language = "English",
volume = "11",
pages = "1--12",
journal = "Applied Sciences",
issn = "2076-3417",
publisher = "MDPI",

}

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TY - JOUR

T1 - Microstructural Changes and Chemical Analysis of Fission Products in Irradiated Uranium-7 wt.% Molybdenum Metallic Fuel Using Atom Probe Tomography

AU - Bachhav, Mukesh

AU - Miller, Brandon D.

AU - Gan, Jian

AU - Keiser, Dennis D.

AU - Leenaers, Ann

AU - Van den Berghe, Sven

AU - Meyer, Mitchell K.

N1 - Score=10

PY - 2021/7

Y1 - 2021/7

N2 - Understanding the microstructural and phase changes occurring during irradiation and their impact on metallic fuel behavior is integral to research and development of nuclear fuel programs. This paper reports systematic analysis of as-fabricated and irradiated low-enriched U-Mo (uranium-molybdenum metal alloy) fuel using atom probe tomography (APT). This study is carried out on U-7 wt.% Mo fuel particles coated with a ZrN layer contained within an Al matrix during irradiation. The dispersion fuel plates from which the fuel samples were extracted are irradiated at Belgian Nuclear Research Centre (SCK CEN) with burn-up of 52% and 66% in the framework of the SELENIUM (Surface Engineering of Low ENrIched Uranium-Molybdenum) project. The APT studies on U-Mo particles from as-fabricated fuel plates enriched to 19.8% revealed predominantly -phase U-Mo, along with a network of the cell boundary decorated with -U, ’-U2Mo, and UC precipitates along the grain boundaries. The corresponding APT characterization of irradiated fuel samples showed formation of fission gas bubbles enriched with solid fission products. The intermediate burnup sample showed a uniform distribution of the typical bubble superlattice with a radius of2 nm arranged in a regular lattice, while the high burnup sample showed a non-uniform distribution of bubbles in grain-refined regions. There was no evidence of remnant -U, ’-U2Mo, and UC phases in the irradiated U-7 wt.% Mo samples.

AB - Understanding the microstructural and phase changes occurring during irradiation and their impact on metallic fuel behavior is integral to research and development of nuclear fuel programs. This paper reports systematic analysis of as-fabricated and irradiated low-enriched U-Mo (uranium-molybdenum metal alloy) fuel using atom probe tomography (APT). This study is carried out on U-7 wt.% Mo fuel particles coated with a ZrN layer contained within an Al matrix during irradiation. The dispersion fuel plates from which the fuel samples were extracted are irradiated at Belgian Nuclear Research Centre (SCK CEN) with burn-up of 52% and 66% in the framework of the SELENIUM (Surface Engineering of Low ENrIched Uranium-Molybdenum) project. The APT studies on U-Mo particles from as-fabricated fuel plates enriched to 19.8% revealed predominantly -phase U-Mo, along with a network of the cell boundary decorated with -U, ’-U2Mo, and UC precipitates along the grain boundaries. The corresponding APT characterization of irradiated fuel samples showed formation of fission gas bubbles enriched with solid fission products. The intermediate burnup sample showed a uniform distribution of the typical bubble superlattice with a radius of2 nm arranged in a regular lattice, while the high burnup sample showed a non-uniform distribution of bubbles in grain-refined regions. There was no evidence of remnant -U, ’-U2Mo, and UC phases in the irradiated U-7 wt.% Mo samples.

KW - Atom probe tomography

KW - Nuclear fuel

KW - Microstructure

KW - Burnup

KW - Enrichment

KW - Uranium

KW - Fission products

UR - https://ecm.sckcen.be/OTCS/llisapi.dll?func=ll&objId=46204100&objAction=download

U2 - 10.3390/app11156905

DO - 10.3390/app11156905

M3 - Article

VL - 11

SP - 1

EP - 12

JO - Applied Sciences

JF - Applied Sciences

SN - 2076-3417

M1 - 6905

ER -

ID: 7220715