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Title: Burst characteristics of advanced accident-tolerant FeCrAl cladding under temperature transient testing

Abstract

Here assessment of burst characteristics of accident-tolerant fuel (ATF) claddings is essential to evaluate the safety margins of nuclear reactors, and better understanding can enable accelerated licensing for reactor concepts that include the new materials. Therefore, this study investigated the burst behavior of an ATF candidate of C26M, which is an iron–chromium–aluminum alloy (FeCrAl) under transient testing like the simulated loss-of-coolant accident (LOCA) conditions, except the water-quenching phase, in light-water reactors (LWRs). The effect of LOCA specimen length was assessed in terms of post-burst tube parameters. No critical length effect was determined on the burst pressure, burst location, and burst size measurements. Burst temperature showed larger variation likely due to its measurement approach used in this study. The post-test diametral strain was identified as the critical parameter to reduce the specimen length as compared to tube burst length or width. Postmortem optical metrology and digital image correlation were employed to determine the local strain-state during the simulated LOCA, which showed the loading path was close to equibiaxial conditions in regions away from the burst location, rather than internally pressurized conditions (or “plane-strain” tension). Pst-test microstructural characterizations of the FeCrAl revealed that ductile damage was present at the edge of themore » outer radial surface while the rest of the material was ruptured via cleavage at LOCA burst temperatures. Furthermore, internal grain boundary cracks were observed at locations away from the tube burst region. This behavior was considered to occur during the cooling down period of the simulated LOCA test. Overall, this study aimed to provide essential data for fuel performance code development by considering micromechanics of the deformation and failure.« less

Authors:
 [1];  [2]; ORCiD logo [1];  [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Idaho National Lab. (INL), Idaho Falls, ID (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Idaho National Lab. (INL), Idaho Falls, ID (United States)
Sponsoring Org.:
USDOE Office of Nuclear Energy (NE)
OSTI Identifier:
1846541
Alternate Identifier(s):
OSTI ID: 1837452
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Nuclear Materials
Additional Journal Information:
Journal Volume: 560; Journal Issue: 1; Journal ID: ISSN 0022-3115
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; iron-chromium-aluminum; FeCrAl alloys; failure behavior; burst characteristics; transient testing; simulated-LOCA

Citation Formats

Garrison, Ben E., Cinbiz, Mahmut Nedim, Gussev, Maxim N., and Linton, Kory D. Burst characteristics of advanced accident-tolerant FeCrAl cladding under temperature transient testing. United States: N. p., 2021. Web. doi:10.1016/j.jnucmat.2021.153488.
Garrison, Ben E., Cinbiz, Mahmut Nedim, Gussev, Maxim N., & Linton, Kory D. Burst characteristics of advanced accident-tolerant FeCrAl cladding under temperature transient testing. United States. https://doi.org/10.1016/j.jnucmat.2021.153488
Garrison, Ben E., Cinbiz, Mahmut Nedim, Gussev, Maxim N., and Linton, Kory D. Sat . "Burst characteristics of advanced accident-tolerant FeCrAl cladding under temperature transient testing". United States. https://doi.org/10.1016/j.jnucmat.2021.153488. https://www.osti.gov/servlets/purl/1846541.
@article{osti_1846541,
title = {Burst characteristics of advanced accident-tolerant FeCrAl cladding under temperature transient testing},
author = {Garrison, Ben E. and Cinbiz, Mahmut Nedim and Gussev, Maxim N. and Linton, Kory D.},
abstractNote = {Here assessment of burst characteristics of accident-tolerant fuel (ATF) claddings is essential to evaluate the safety margins of nuclear reactors, and better understanding can enable accelerated licensing for reactor concepts that include the new materials. Therefore, this study investigated the burst behavior of an ATF candidate of C26M, which is an iron–chromium–aluminum alloy (FeCrAl) under transient testing like the simulated loss-of-coolant accident (LOCA) conditions, except the water-quenching phase, in light-water reactors (LWRs). The effect of LOCA specimen length was assessed in terms of post-burst tube parameters. No critical length effect was determined on the burst pressure, burst location, and burst size measurements. Burst temperature showed larger variation likely due to its measurement approach used in this study. The post-test diametral strain was identified as the critical parameter to reduce the specimen length as compared to tube burst length or width. Postmortem optical metrology and digital image correlation were employed to determine the local strain-state during the simulated LOCA, which showed the loading path was close to equibiaxial conditions in regions away from the burst location, rather than internally pressurized conditions (or “plane-strain” tension). Pst-test microstructural characterizations of the FeCrAl revealed that ductile damage was present at the edge of the outer radial surface while the rest of the material was ruptured via cleavage at LOCA burst temperatures. Furthermore, internal grain boundary cracks were observed at locations away from the tube burst region. This behavior was considered to occur during the cooling down period of the simulated LOCA test. Overall, this study aimed to provide essential data for fuel performance code development by considering micromechanics of the deformation and failure.},
doi = {10.1016/j.jnucmat.2021.153488},
journal = {Journal of Nuclear Materials},
number = 1,
volume = 560,
place = {United States},
year = {Sat Dec 18 00:00:00 EST 2021},
month = {Sat Dec 18 00:00:00 EST 2021}
}

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