Progress Report on Modified Burst Testing and Alternative Test Methodologies

Cinbiz, Mahmut Nedim; Garrison, Ben; Lowden, Rick R.; Sitterson, R G.; Linton, Kory

doi:10.2172/1530086

Cited by 3 publications

(4 citation statements)

References 10 publications

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“…More details on the material can be found in the literature [12,13]. These FeCrAl cladding alloys were used in previous ORNL MBT experiments [6,8,9], which allows for comparison of PST and MBT results. C26M had moderate strength level (estimated yield stress ~500-600 MPa) and reasonable ductility (total elongation ~20%).…”

Section: Methodsmentioning

confidence: 99%

“…MBT was introduced by the Electric Power Research Institute as a method to produce the multiaxial stress state under the high strain rates and temperature expected during RIA events. This method has been further developed by Oak Ridge National Laboratory (ORNL) [5][6][7][8][9]. The modified burst test implemented at ORNL includes the use of a servo hydraulic high-speed test frame, a high-speed camera, a precise mirror setup with a telecentric lens for digital image correlation (DIC) analysis [10], and insulated heating.…”

Section: Introductionmentioning

confidence: 99%

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Plane-Strain Tension Testing of ATF FeCrAl Cladding (Progress Report)

Garrison

Gussev

Linton

2020

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Performance of advanced accident-tolerant fuel (ATF) claddings must be assessed under all relevant scenarios, including normal and off-normal operating conditions, as well as during a reactivity-initiated accident (RIA). During RIA, the fuel pellet may expand and cause significant loads on cladding, a condition known as pellet cladding mechanical interaction (PCMI), which may even lead to cladding failure. This report describes the fiscal year (FY) 2020 research activities and results from the development of separate-effects testing for ATF cladding candidate iron-chromium-aluminum (FeCrAl) tube specimens under loading conditions expected during RIA/PCMI events. To assess material performance under PCMI, a high strain rate burst test, often termed the modified burst test (MBT), is commonly employed. However, execution of such a test in a hot cell requires significant research. To overcome the complexities of performing MBTs in a hot-cell environment on irradiated samples, a plane-strain tension (PST) test was proposed by several authors as an alternative approach for PCMI testing. A new fixture was developed so that PST specimens could be tested using a more accommodating design for hot-cell manipulators. This report presents the PST fixture design, evaluates the possibility of modifying the specimen geometry, and discusses experimental results with unirradiated Al 6061 and FeCrAl tubes at various lengths. Furthermore, this report discusses the relevance and compatibility of the PST results to RIA scenarios and compares the PST and MBT results.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Plane-Strain Tension Testing of ATF FeCrAl Cladding (Progress Report)

Garrison

Gussev

Linton

2020

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“…These changes could be caused by irradiation, temperature cycling, and/or accident scenarios and are typically not modeled, but they may be crucial to be incorporated. Determining changes on the interface requires visual investigation of the edge cases of thermal treatments of coated cladding at LOCA-relevant temperatures and after integral LOCA tests on high-burnup fuel segments [29,30]. ORNL provides excellent conditions to perform these tests using the Severe Accident Test Station (SATS) in the Irradiated Fuels Examination Facility (IFEL).…”

Section: Eutectic Penetration / Penetration Ratementioning

confidence: 99%

Development of Standardized Property Requirements, Measurement Methods, and Reporting Guidance for Coatings

Gräning¹,

Sweet²,

Mouche³

et al. 2021

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“…These changes could be aggravated by irradiation, temperature cycling, and/or accident scenarios and are typically not modeled, but they may be crucial to be incorporated if the Cr2Zr phase is showing a significant impact on the properties during normal operation and in case of accident scenarios. Therefore, integral LOCA tests on high-burnup fuel segments are required after a base study was conducted [17,18]. This report presents part of this base study.…”

Section: The Cr-zr Binary Systemmentioning

confidence: 99%

Microstructure Investigation and Mechanical Properties of Coated Zircaloy Cladding

Gräning

Massey

Linton

et al. 2021

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Accident Tolerant Fuel concepts have been developed and tested in diverse research programs presently around the world. Industry teams have developed proprietary coating compositions and geometries, but significant knowledge gaps exist in terms of the resulting properties of the coating and the cladding and how those components impact each other in reactor conditions. Furthermore, the national laboratory and university teams currently studying the industry concepts are limited in their ability to freely disseminate and discuss results obtained on commercial coatings. The Advanced Fuels Campaign is therefore working to develop an understanding of 'generic' coatings applied to commercial nuclear cladding alloys free of these constraints. This milestone report provides insights in the microstructure of a 7-micrometer Cr coating on Zircaloy-2 and a 5micrometer coating on Zry-4 as reference materials. SEM and TEM methods were utilized to describe and identify the interface, while nanoindentation was used to determine hardness and E-Moduli of coating and cladding material. This milestone summarizes the acquired knowledge to build a necessary verified foundation for future simulation and qualification efforts.

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Progress Report on Modified Burst Testing and Alternative Test Methodologies

Cited by 3 publications

References 10 publications

Plane-Strain Tension Testing of ATF FeCrAl Cladding (Progress Report)

Plane-Strain Tension Testing of ATF FeCrAl Cladding (Progress Report)

Development of Standardized Property Requirements, Measurement Methods, and Reporting Guidance for Coatings

Microstructure Investigation and Mechanical Properties of Coated Zircaloy Cladding

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