Elastic moduli reduction in SiC-SiC tubular specimen after high heat flux neutron irradiation measured by resonant ultrasound spectroscopy

G. Singh; T. Koyanagi; C. Petrie; C. Deck; K. Terrani; J. D. Arregui-Mena; Y. Katoh

doi:10.1016/j.jnucmat.2019.06.026

Elastic moduli reduction in SiC-SiC tubular specimen after high heat flux neutron irradiation measured by resonant ultrasound spectroscopy

G. Singh, T. Koyanagi, C. Petrie, C. Deck, K. Terrani, J. D. Arregui-Mena, Y. Katoh

Research output: Contribution to journal › Article › peer-review

12 Scopus citations

Abstract

The initial results of a post-irradiation examination study conducted on a SiC-SiC tubular specimen irradiated under a high radial heat flux are presented herein. The elastic properties of the specimen were evaluated before and after the irradiation using the resonant ultrasound spectroscopy (RUS) technique. The composite tubular specimen was considered as an orthotropic elastic with nine elastic constants (Young's moduli, shear moduli and Poisson's ratios—three components of each) for representing its full elastic deformation behavior. All the elastic moduli decreased after irradiation; the reduction was as high as 35% in one of the moduli. The significant decrease in the moduli indicates the presence of microcracks. The results from a computational study show significant stress development in the specimen due to irradiation, primarily caused by differential swelling across the thickness of the specimen. The evaluated stresses exceed the proportional limit stress of the material, indicating the likelihood of matrix microcracking, and thus corroborating the results obtained from RUS. X-ray Computed Tomography (XCT) study confirmed the presence of cracks in the irradiated specimen. These cracks occurred at the inner region of the specimen and propagated in axial and hoop directions. These XCT results are in agreement with the RUS results and stress distribution results from the computational study.

Original language	English
Pages (from-to)	391-401
Number of pages	11
Journal	Journal of Nuclear Materials
Volume	523
DOIs	https://doi.org/10.1016/j.jnucmat.2019.06.026
State	Published - Sep 2019

Funding

This research was supported by the Advanced Fuels Campaign of the Nuclear Technology R&D program within the United States Department of Energy (DOE) Office of Nuclear Energy . This work was prepared under contract DE-AC05-00OR22725 with Oak Ridge National Laboratory managed by UT Battelle LLC. A portion of this research used resources at the High Flux Isotope Reactor, which is funded by the DOE Office of Basic Energy Sciences . This work was also supported by the US Department of Energy (DOE) Office of Nuclear Energy under DOE Idaho Operations Office Contract DE-AC07-051D14517 as part of a Nuclear Science User Facilities experiment. Technical advice by Dr. Amit Shyam (ORNL) and XCT experiment by Dr. Ercan Cakmak (ORNL) are gratefully acknowledged.

Keywords

Accident-tolerant fuel
Cladding
LWR
Nondestructive testing
Nuclear
SiC
Silicon carbide

Access to Document

10.1016/j.jnucmat.2019.06.026

Cite this

@article{155d1ba3cbf845ebbe7e25b8e6f8654f,

title = "Elastic moduli reduction in SiC-SiC tubular specimen after high heat flux neutron irradiation measured by resonant ultrasound spectroscopy",

abstract = "The initial results of a post-irradiation examination study conducted on a SiC-SiC tubular specimen irradiated under a high radial heat flux are presented herein. The elastic properties of the specimen were evaluated before and after the irradiation using the resonant ultrasound spectroscopy (RUS) technique. The composite tubular specimen was considered as an orthotropic elastic with nine elastic constants (Young's moduli, shear moduli and Poisson's ratios—three components of each) for representing its full elastic deformation behavior. All the elastic moduli decreased after irradiation; the reduction was as high as 35% in one of the moduli. The significant decrease in the moduli indicates the presence of microcracks. The results from a computational study show significant stress development in the specimen due to irradiation, primarily caused by differential swelling across the thickness of the specimen. The evaluated stresses exceed the proportional limit stress of the material, indicating the likelihood of matrix microcracking, and thus corroborating the results obtained from RUS. X-ray Computed Tomography (XCT) study confirmed the presence of cracks in the irradiated specimen. These cracks occurred at the inner region of the specimen and propagated in axial and hoop directions. These XCT results are in agreement with the RUS results and stress distribution results from the computational study.",

keywords = "Accident-tolerant fuel, Cladding, LWR, Nondestructive testing, Nuclear, SiC, Silicon carbide",

author = "G. Singh and T. Koyanagi and C. Petrie and C. Deck and K. Terrani and Arregui-Mena, {J. D.} and Y. Katoh",

note = "Publisher Copyright: {\textcopyright} 2019 Elsevier B.V.",

year = "2019",

month = sep,

doi = "10.1016/j.jnucmat.2019.06.026",

language = "English",

volume = "523",

pages = "391--401",

journal = "Journal of Nuclear Materials",

issn = "0022-3115",

publisher = "Elsevier",

}

TY - JOUR

T1 - Elastic moduli reduction in SiC-SiC tubular specimen after high heat flux neutron irradiation measured by resonant ultrasound spectroscopy

AU - Singh, G.

AU - Koyanagi, T.

AU - Petrie, C.

AU - Deck, C.

AU - Terrani, K.

AU - Arregui-Mena, J. D.

AU - Katoh, Y.

PY - 2019/9

Y1 - 2019/9

N2 - The initial results of a post-irradiation examination study conducted on a SiC-SiC tubular specimen irradiated under a high radial heat flux are presented herein. The elastic properties of the specimen were evaluated before and after the irradiation using the resonant ultrasound spectroscopy (RUS) technique. The composite tubular specimen was considered as an orthotropic elastic with nine elastic constants (Young's moduli, shear moduli and Poisson's ratios—three components of each) for representing its full elastic deformation behavior. All the elastic moduli decreased after irradiation; the reduction was as high as 35% in one of the moduli. The significant decrease in the moduli indicates the presence of microcracks. The results from a computational study show significant stress development in the specimen due to irradiation, primarily caused by differential swelling across the thickness of the specimen. The evaluated stresses exceed the proportional limit stress of the material, indicating the likelihood of matrix microcracking, and thus corroborating the results obtained from RUS. X-ray Computed Tomography (XCT) study confirmed the presence of cracks in the irradiated specimen. These cracks occurred at the inner region of the specimen and propagated in axial and hoop directions. These XCT results are in agreement with the RUS results and stress distribution results from the computational study.

AB - The initial results of a post-irradiation examination study conducted on a SiC-SiC tubular specimen irradiated under a high radial heat flux are presented herein. The elastic properties of the specimen were evaluated before and after the irradiation using the resonant ultrasound spectroscopy (RUS) technique. The composite tubular specimen was considered as an orthotropic elastic with nine elastic constants (Young's moduli, shear moduli and Poisson's ratios—three components of each) for representing its full elastic deformation behavior. All the elastic moduli decreased after irradiation; the reduction was as high as 35% in one of the moduli. The significant decrease in the moduli indicates the presence of microcracks. The results from a computational study show significant stress development in the specimen due to irradiation, primarily caused by differential swelling across the thickness of the specimen. The evaluated stresses exceed the proportional limit stress of the material, indicating the likelihood of matrix microcracking, and thus corroborating the results obtained from RUS. X-ray Computed Tomography (XCT) study confirmed the presence of cracks in the irradiated specimen. These cracks occurred at the inner region of the specimen and propagated in axial and hoop directions. These XCT results are in agreement with the RUS results and stress distribution results from the computational study.

KW - Accident-tolerant fuel

KW - Cladding

KW - LWR

KW - Nondestructive testing

KW - Nuclear

KW - SiC

KW - Silicon carbide

UR - http://www.scopus.com/inward/record.url?scp=85067561252&partnerID=8YFLogxK

U2 - 10.1016/j.jnucmat.2019.06.026

DO - 10.1016/j.jnucmat.2019.06.026

M3 - Article

AN - SCOPUS:85067561252

SN - 0022-3115

VL - 523

SP - 391

EP - 401

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

ER -

Elastic moduli reduction in SiC-SiC tubular specimen after high heat flux neutron irradiation measured by resonant ultrasound spectroscopy

Abstract

Funding

Keywords

Access to Document

Other files and links

Fingerprint

Cite this