skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Thermal diffusivity and thermal conductivity of SiC composite tubes: the effects of microstructure and irradiation

Journal Article · · Journal of Nuclear Materials
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [2];  [3];  [4];  [4];  [5];  [5]; ORCiD logo [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science and Technology Division
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Nuclear Energy and Fuel Cycle
  3. General Atomics, Electromagnetic Systems, San Diego, CA (United States). Nuclear Technologies and Materials Division
  4. Korea Atomic Energy Research Institute, Daejeon (Korea, Republic of). Nuclear Materials Division
  5. Univ. Paris-Saclay, Gif-sur-Yvette (France). CEA, Service de Recherches Métallurgiques Appliquées

Cladding thermal conductivity is an important physical property in assessing the performance of silicon carbide (SiC)-cladded fuels for nuclear reactors. However, there is a significant lack of reliable data, particularly for irradiated materials, because the geometry complicates the measurement. This study investigates the thermal diffusivity of coupons with a curvature, machined from SiC fiber–reinforced SiC matrix composite tubes, with and without neutron irradiation under light water reactor–relevant temperature and dose conditions. The tested materials included full composite and duplex SiC composite tubes. The measurements were conducted using a modern flash diffusivity apparatus. The analyzed area on the specimen during diffusivity testing was reduced for improved measurement accuracy due to sample curvature. Post-irradiation measurements showed that the effects of neutron irradiation on thermal conductivity (e.g. thermal defect resistivity) are different between SiC composite plates versus tubes. The difference was explained by higher matrix density of the tube than the plate. This study provides reliable thermal properties of prototypic SiC composite tubes useful for fuel performance modeling of SiC-based cladding.

Research Organization:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Nuclear Energy (NE); National Research Foundation of Korea (NRF)
Grant/Contract Number:
AC05-00OR22725; AC07-051D14517; 2017M2A8A4017642
OSTI ID:
1814350
Alternate ID(s):
OSTI ID: 1813475
Journal Information:
Journal of Nuclear Materials, Vol. 557, Issue NA; ISSN 0022-3115
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

References (45)

Analysis of SiC/SiC composites for energy applications at ambient conditions journal September 2020
Interlaboratory round robin study on axial tensile properties of SiC-SiC CMC tubular test specimens journal May 2018
Thermo-mechanical assessment of full SiC/SiC composite cladding for LWR applications with sensitivity analysis journal February 2018
Mechanical properties of SiC/SiC braided tubes for fuel cladding journal October 2014
The potential impact of enhanced accident tolerant cladding materials on reactivity initiated accidents in light water reactors journal January 2017
Flash Method of Determining Thermal Diffusivity, Heat Capacity, and Thermal Conductivity journal September 1961
Dimensional stability and anisotropy of SiC and SiC-based composites in transition swelling regime journal February 2018
Handbook of SiC properties for fuel performance modeling journal September 2007
Characterization of SiC–SiC composites for accident tolerant fuel cladding journal November 2015
Thermal diffusivity of rods, tubes, and spheres by the flash method journal March 2006
Mechanical properties of SiC composites neutron irradiated under light water reactor relevant temperature and dose conditions journal October 2017
In situ observation of mechanical damage within a SiC-SiC ceramic matrix composite journal December 2016
Method for analyzing passive silicon carbide thermometry with a continuous dilatometer to determine irradiation temperature
  • Campbell, Anne A.; Porter, Wallace D.; Katoh, Yutai
  • Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Vol. 370 https://doi.org/10.1016/j.nimb.2016.01.005
journal March 2016
Oxidation at high temperatures in steam atmosphere and quench of silicon carbide composites for nuclear application journal December 2015
Influence of an original manufacturing process on the properties and microstructure of SiC/SiC tubular composites journal August 2019
Implications of SiC irradiation creep and annealing to UN-SiC fuel rod behavior journal December 2020
Fabrication and measurement of hoop strength of SiC triplex tube for nuclear fuel cladding applications journal March 2015
Unveiling hermetic failure of ceramic tubes by digital image correlation and acoustic emission journal October 2019
Probabilistic view of SiC/SiC composite cladding failure based on full core thermo-mechanical response journal August 2018
Porosity—Thermal conductivity correlations for ceramic materials journal January 1975
C-ring testing of nuclear grade silicon carbide composites at temperatures up to 1900 °C journal August 2019
Thermal diffusivity measurements by using "logarithmic method" on samples having anomalous shape. [「対数法」による非定形試料の熱拡散率測定] journal January 1994
The effect of neutron irradiation on the fiber/matrix interphase of silicon carbide composites journal February 2009
Thermo-mechanical analysis of LWR SiC/SiC composite cladding journal April 2014
Japanese activities of the R&D on silicon carbide composites in the broader approach period and beyond journal December 2018
A new estimation method for the intrinsic thermal conductivity of nonmetallic compounds journal March 2005
Thermophysical and mechanical properties of near-stoichiometric fiber CVI SiC/SiC composites after neutron irradiation at elevated temperatures journal August 2010
Mechanical and thermal properties of 2D and 3D SiC/SiC composites journal December 2000
Evaluation of neutron irradiated silicon carbide and silicon carbide composites journal September 2007
Continuous SiC fiber, CVI SiC matrix composites for nuclear applications: Properties and irradiation effects journal May 2014
Investigations on swelling and fission gas behaviour in uranium dioxide journal July 1978
Silicon Carbide Oxidation in Steam up to 2 MPa journal July 2014
Accident tolerant fuel cladding development: Promise, status, and challenges journal April 2018
Oxidation kinetics of silicon carbide in steam at temperature range of 1400 to 1800 °C studied by laser heating journal February 2020
Characteristics of Composite Silicon Carbide Fuel Cladding after Irradiation under Simulated PWR Conditions journal July 2013
Enchanced high-temperature performances of SiC/SiC composites by high densification and crystalline structure journal February 2011
Experimental design and analysis for irradiation of SiC/SiC composite tubes under a prototypic high heat flux journal August 2017
UPDATED U3SI2 thermal creep model and sensitivity analysis of the U3SI2-SIC accident tolerant FUEL journal January 2021
Elastic moduli reduction in SiC-SiC tubular specimen after high heat flux neutron irradiation measured by resonant ultrasound spectroscopy journal September 2019
Thermal properties of silicon carbide composites fabricated with chopped Tyranno® SiAlC fibres journal January 2006
Mechanical property degradation of high crystalline SiC fiber–reinforced SiC matrix composite neutron irradiated to ∼100 displacements per atom journal April 2018
A radial heat flow apparatus for thermal conductivity characterisation of cylindrical samples journal July 2017
Fabrication of two-layer SiC nanowire cladding tube with high thermal conductivity journal August 2020
The transverse thermal conductivity of 2D-SiCf/SiC composites journal July 2002
Pulse Method of Measuring Thermal Diffusivity at High Temperatures journal April 1963