Strength and rupture geometry of un-irradiated C26M FeCrAl under LOCA burst testing conditions

Bell, Samuel; Kane, Kenneth; Massey, Caleb; Baldesberger, Lucas A.; Lutz, Dan; Pint, Bruce A.

doi:10.1016/j.jnucmat.2021.153242

Cited by 35 publications

(9 citation statements)

References 37 publications

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“…To evaluate the impact of Cr coatings on metrics representative of those needed to demonstrate accident tolerance, burst testing under simulated LOCA conditions was performed utilizing the severe accident test station (SATS) at ORNL. Detailed descriptions of the test procedure are given elsewhere [24,25].…”

Section: Burst Test Resultsmentioning

confidence: 99%

“…In earlier studies comparing burst behavior of C26M FeCrAl to Zry-2 [25], burst temperatures and stresses were reported without denoted error, as C26M consistently burst at temperatures ~150°-200°C higher than Zry-2 at similar hoop stresses. However, any improvements to Zry-4 material strength imparted by a 5-10 µm Cr coating are assumed a priori to be small relative to that of the differences between C26M and Zry-2.…”

Section: Burst Test Resultsmentioning

confidence: 99%

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Impact of Coating Defects on Performance of Coated Zirconium Cladding

Seibert¹,

Kane²,

Garrison³

et al. 2021

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The Advanced Fuels Campaign has made progress in developing an ability to fabricate high quality 'generic' chromium coatings applied to commercial nuclear cladding alloys free of the proprietary considerations inherent to the industry materials. The availability of such source material is critical for execution of fundamental studies as well as open collaboration between the national laboratories, within Office of Nuclear Energy programs, and the Nuclear Regulatory Commission. This milestone report provides insights on the impact of processing parameters on the microstructure of 7 micron Cr-coated Zircaloy-4. Coatings were applied using High Power Impulse Magnetron Sputtering (HiPIMS). Scanning electron microscopy was utilized to investigate the overcoating of cladding and cross-sections of the interface. Characterization confirmed that a high quality, continuous coating was achieved. Burst testing was then performed to evaluate the performance of high-quality coatings to coatings that contain known flaws and uncoated materials. Results demonstrated that coatings containing flaws allowing for direct exposure of the base cladding to atmosphere exhibit burst behavior matching that of the uncoated material. However, continuous coatings resulted in measurable improvement. This work will be expanded in FY22 to include a broader set of mechanical property studies and test irradiations.

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Section: Burst Test Resultsmentioning

confidence: 99%

Section: Burst Test Resultsmentioning

confidence: 99%

Impact of Coating Defects on Performance of Coated Zirconium Cladding

Seibert¹,

Kane²,

Garrison³

et al. 2021

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“…Details regarding simulated LOCA burst testing are reported elsewhere [15,16,45,46], but is briefly described here. Approximately 30 cm cladding segments of bare and Cr-coated Zirlo were subjected to simulated LOCA transients in a steam environment using the Severe Accident Test Station (SATS) at Oak Ridge National Laboratory (ORNL).…”

Section: Methodsmentioning

confidence: 99%

“…After burst, a Keyence VR-3100 microscope was used to image the full length of the claddings [16]. Burst opening area and length (from end to end of the rupture) were measured via image analysis.…”

Section: Methodsmentioning

confidence: 99%

“…There are two possible alternatives to bare Zr claddings: (1) replacing Zr based alloys with stronger, more oxidation resistant materials like FeCrAl [2,3,[13][14][15][16] or SiC-based ceramic matrix composites [17][18][19][20][21], or (2) application of a cladding coating to mitigate ZrO2 formation during accident scenarios. The former is a longer-term solution, while the application of coatings is expected to be a shorter-term implementation.…”

Section: Introductionmentioning

confidence: 99%

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Burst and oxidation behavior of Cr-coated Zirlo during simulated LOCA testing

Bell

Gräning

Kelly

et al. 2022

Journal of Nuclear Materials

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High‐Temperature Mechanical Behavior of Single‐Crystal FeCrAl Alloy Under In Situ Micropillar Compression

Sun,

Niu,

Shang

et al. 2024

Adv Eng Mater

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FeCrAl cladding is one of the candidate materials for the near‐term accident‐tolerant fuel technologies under development. Research on high‐temperature mechanical behaviors of single‐crystal FeCrAl alloy is rather limited. Previous studies have reported the mechanical property of low‐index orientation in single‐crystal FeCrAl alloy at room temperature. However, the critical resolved shear stress to activate slip systems can be orientation and temperature dependent. Here, single‐crystal grains in a coarse‐grained FeCrAl alloy with different crystallographic orientations are selected to preferentially activate {110}<111> slip systems or {112}<111> slip systems. Micropillars are fabricated in the selected single‐crystal grains and tested at elevated temperatures in situ in a scanning electron microscope. The critical resolved shear stresses of {110}<111> slip systems and {112}<111> slip systems are determined at various temperatures. The critical resolved shear stress shows a temperature dependence and orientation independence. This study provides important insight for understanding the deformation mechanisms of FeCrAl alloys at elevated temperatures.

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Strength and rupture geometry of un-irradiated C26M FeCrAl under LOCA burst testing conditions

Cited by 35 publications

References 37 publications

Impact of Coating Defects on Performance of Coated Zirconium Cladding

Impact of Coating Defects on Performance of Coated Zirconium Cladding

Burst and oxidation behavior of Cr-coated Zirlo during simulated LOCA testing

High‐Temperature Mechanical Behavior of Single‐Crystal FeCrAl Alloy Under In Situ Micropillar Compression

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