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Title: Hydrothermal Corrosion of SiC Materials for Accident Tolerant Fuel Cladding with and Without Mitigation Coatings

Abstract

As a candidate material for accident-tolerant fuel cladding for light water reactors (LWR), SiCf–SiC composite materials possess many attractive properties. However, prior work has shown that SiC is susceptible to aqueous dissolution in LWR coolant environments. To address this issue, candidate coatings have been developed to inhibit dissolution. For this study, CVD SiC samples were prepared with Cr, CrN, TiN, ZrN, NiCr, and Ni coatings. Uncoated SiC and SiCf–SiC samples were also prepared. The samples were exposed for 400 h in 288 °C water with 2 wppm DO in a constantly-refreshing autoclave to simulate BWR–NWC. Cr and Ni coated samples lost less mass than the uncoated SiC sample, indicating an improvement in performance. The CrN coating resisted oxidation, but some of the coating was lost due to poor adhesion. The TiN coated sample gained significant mass due to oxidation of the coating. ZrN and NiCr coatings showed significant corrosion attack. SiCf–SiC ceramic matrix composite materials dissolved much faster than the CVD SiC sample, demonstrating the need for mitigation coatings if CMCs are to be used in LWRs. This work demonstrates the promise of Cr, Ni and CrN coatings for corrosion mitigation in LWRs, and shows that NiCr and ZrN aremore » not promising coating materials.« less

Authors:
ORCiD logo [1]; ORCiD logo [1];  [1]; ORCiD logo [1]
  1. ORNL
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1423097
DOE Contract Number:  
AC05-00OR22725
Resource Type:
Conference
Resource Relation:
Conference: 18th International Conference on Environmental Degradation of Materials in Nuclear Power Systems – Water Reactors , Portland, Washington, United States of America, 8/13/2017 - 8/17/2017
Country of Publication:
United States
Language:
English

Citation Formats

Raiman, Stephen S., Ang, Caen K., Doyle, Peter J., and Terrani, Kurt A. Hydrothermal Corrosion of SiC Materials for Accident Tolerant Fuel Cladding with and Without Mitigation Coatings. United States: N. p., 2017. Web. doi:10.1007/978-3-319-68454-3_22.
Raiman, Stephen S., Ang, Caen K., Doyle, Peter J., & Terrani, Kurt A. Hydrothermal Corrosion of SiC Materials for Accident Tolerant Fuel Cladding with and Without Mitigation Coatings. United States. doi:10.1007/978-3-319-68454-3_22.
Raiman, Stephen S., Ang, Caen K., Doyle, Peter J., and Terrani, Kurt A. Sun . "Hydrothermal Corrosion of SiC Materials for Accident Tolerant Fuel Cladding with and Without Mitigation Coatings". United States. doi:10.1007/978-3-319-68454-3_22. https://www.osti.gov/servlets/purl/1423097.
@article{osti_1423097,
title = {Hydrothermal Corrosion of SiC Materials for Accident Tolerant Fuel Cladding with and Without Mitigation Coatings},
author = {Raiman, Stephen S. and Ang, Caen K. and Doyle, Peter J. and Terrani, Kurt A.},
abstractNote = {As a candidate material for accident-tolerant fuel cladding for light water reactors (LWR), SiCf–SiC composite materials possess many attractive properties. However, prior work has shown that SiC is susceptible to aqueous dissolution in LWR coolant environments. To address this issue, candidate coatings have been developed to inhibit dissolution. For this study, CVD SiC samples were prepared with Cr, CrN, TiN, ZrN, NiCr, and Ni coatings. Uncoated SiC and SiCf–SiC samples were also prepared. The samples were exposed for 400 h in 288 °C water with 2 wppm DO in a constantly-refreshing autoclave to simulate BWR–NWC. Cr and Ni coated samples lost less mass than the uncoated SiC sample, indicating an improvement in performance. The CrN coating resisted oxidation, but some of the coating was lost due to poor adhesion. The TiN coated sample gained significant mass due to oxidation of the coating. ZrN and NiCr coatings showed significant corrosion attack. SiCf–SiC ceramic matrix composite materials dissolved much faster than the CVD SiC sample, demonstrating the need for mitigation coatings if CMCs are to be used in LWRs. This work demonstrates the promise of Cr, Ni and CrN coatings for corrosion mitigation in LWRs, and shows that NiCr and ZrN are not promising coating materials.},
doi = {10.1007/978-3-319-68454-3_22},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2017},
month = {10}
}

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Works referenced in this record:

Multilayer (TiN, TiAlN) ceramic coatings for nuclear fuel cladding
journal, September 2016


Preliminary assessment of accident-tolerant fuels on LWR performance during normal operation and under DB and BDB accident conditions
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Neutronic evaluation of coating and cladding materials for accident tolerant fuels
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High temperature steam-oxidation behavior of arc ion plated Cr coatings for accident tolerant fuel claddings
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Accident tolerant fuels for LWRs: A perspective
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Hydrothermal corrosion of SiC in LWR coolant environments in the absence of irradiation
journal, October 2015


Silicon Carbide Oxidation in Steam up to 2 MPa
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  • Terrani, Kurt A.; Pint, Bruce A.; Parish, Chad M.
  • Journal of the American Ceramic Society, Vol. 97, Issue 8
  • DOI: 10.1111/jace.13094

Oxidation of fuel cladding candidate materials in steam environments at high temperature and pressure
journal, August 2012