Advanced Microscopy for Characterization of High Burnup Commercial UO2 Fuel Before and After LOCA Testing

Rachel Seibert; Casey McKinney; Chad Parish; Tyler J. Gerczak; Jason Harp; Jesse Werden; Nathan Capps

doi:10.2172/1923962

Advanced Microscopy for Characterization of High Burnup Commercial UO₂ Fuel Before and After LOCA Testing

Rachel Seibert, Casey McKinney, Chad Parish, Tyler J. Gerczak, Jason Harp, Jesse Werden, Nathan Capps

Research output: Book/Report › Commissioned report

Abstract

This report presents the results from the microstructural examination of high burnup UO₂ under pre- and post- loss of coolant accident (LOCA) conditions. The work in this report builds and expands upon work previously conducted on high burnup UO₂ fuel at Oak Ridge National Laboratory (ORNL). This work investigates the microstructural evolution that occurs during steady state irradiation of UO₂, particularly in high burnup fuel. Several high burnup fuel samples were available from historic fuel shipments to ORNL. Microstructural characterization will aid in understanding why the fuel is susceptible to fuel fragmentation and support future work to investigate the formation mechanisms of certain features that form under irradiation. High burnup UO₂ microstructural data is also needed to improve constitutive models intended to predict high burnup fuel fragmentation (HBFF). This report summarizes the microstructural evaluation of these fuel samples to interpret and analyze high burnup fuel microstructures.

Original language	English
Place of Publication	United States
DOIs	https://doi.org/10.2172/1923962
State	Published - 2022

Keywords

11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS

Access to Document

10.2172/1923962

Cite this

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title = "Advanced Microscopy for Characterization of High Burnup Commercial UO2 Fuel Before and After LOCA Testing",

abstract = "This report presents the results from the microstructural examination of high burnup UO2 under pre- and post- loss of coolant accident (LOCA) conditions. The work in this report builds and expands upon work previously conducted on high burnup UO2 fuel at Oak Ridge National Laboratory (ORNL). This work investigates the microstructural evolution that occurs during steady state irradiation of UO2, particularly in high burnup fuel. Several high burnup fuel samples were available from historic fuel shipments to ORNL. Microstructural characterization will aid in understanding why the fuel is susceptible to fuel fragmentation and support future work to investigate the formation mechanisms of certain features that form under irradiation. High burnup UO2 microstructural data is also needed to improve constitutive models intended to predict high burnup fuel fragmentation (HBFF). This report summarizes the microstructural evaluation of these fuel samples to interpret and analyze high burnup fuel microstructures.",

keywords = "11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS",

author = "Rachel Seibert and Casey McKinney and Chad Parish and Gerczak, {Tyler J.} and Jason Harp and Jesse Werden and Nathan Capps",

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doi = "10.2172/1923962",

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T1 - Advanced Microscopy for Characterization of High Burnup Commercial UO2 Fuel Before and After LOCA Testing

AU - Seibert, Rachel

AU - McKinney, Casey

AU - Parish, Chad

AU - Gerczak, Tyler J.

AU - Harp, Jason

AU - Werden, Jesse

AU - Capps, Nathan

PY - 2022

Y1 - 2022

N2 - This report presents the results from the microstructural examination of high burnup UO2 under pre- and post- loss of coolant accident (LOCA) conditions. The work in this report builds and expands upon work previously conducted on high burnup UO2 fuel at Oak Ridge National Laboratory (ORNL). This work investigates the microstructural evolution that occurs during steady state irradiation of UO2, particularly in high burnup fuel. Several high burnup fuel samples were available from historic fuel shipments to ORNL. Microstructural characterization will aid in understanding why the fuel is susceptible to fuel fragmentation and support future work to investigate the formation mechanisms of certain features that form under irradiation. High burnup UO2 microstructural data is also needed to improve constitutive models intended to predict high burnup fuel fragmentation (HBFF). This report summarizes the microstructural evaluation of these fuel samples to interpret and analyze high burnup fuel microstructures.

AB - This report presents the results from the microstructural examination of high burnup UO2 under pre- and post- loss of coolant accident (LOCA) conditions. The work in this report builds and expands upon work previously conducted on high burnup UO2 fuel at Oak Ridge National Laboratory (ORNL). This work investigates the microstructural evolution that occurs during steady state irradiation of UO2, particularly in high burnup fuel. Several high burnup fuel samples were available from historic fuel shipments to ORNL. Microstructural characterization will aid in understanding why the fuel is susceptible to fuel fragmentation and support future work to investigate the formation mechanisms of certain features that form under irradiation. High burnup UO2 microstructural data is also needed to improve constitutive models intended to predict high burnup fuel fragmentation (HBFF). This report summarizes the microstructural evaluation of these fuel samples to interpret and analyze high burnup fuel microstructures.

KW - 11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS

U2 - 10.2172/1923962

DO - 10.2172/1923962

M3 - Commissioned report

BT - Advanced Microscopy for Characterization of High Burnup Commercial UO2 Fuel Before and After LOCA Testing

CY - United States