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Title: Radiation Tolerance of Silicon Carbide Joints at LWR Relevant Temperature

Abstract

The development of reliable joints in reactor service conditions is a critical requirement for SiC based accident tolerant fuels and core structures for light water reactor (LWR) applications. The effects of neutron irradiation on the mechanical properties is an important consideration under normal operation. Though various SiC joints retained the strength following neutron irradiation at ∼500 and ∼800 deg. C to ∼3 dpa, the irradiation tolerance of the joints at the LWR relevant temperature is still an unknown. This study presents the strengths of the candidate SiC joints following irradiation at ∼300 deg. C. The bonding strength was investigated using torsional shear testing which was developed for miniature irradiation specimens in previous work. Torsional shear strengths of various SiC joints were evaluated following irradiation at 270-310 deg. C to 8.7 dpa. Strength degradation by the irradiation likely occurred in the Mo diffusion bond. No obvious strength degradation was found in the MAX phase and hybrid polymer/CVD joints. The irradiation caused large deviation of the strength of Ti diffusion bond, TEP slurry and tape joints. The cause of this deviation will be investigated based on microstructural analysis in future work. (authors)

Authors:
; ;  [1];  [2];  [3]
  1. Oak Ridge National Laboratory, One Bethel Valley Road, Oak Ridge, TN, 37831 (United States)
  2. Institute of Advanced Energy, Kyoto University, Gokasho, Uji, Koyto, 611-0011 (Japan)
  3. General Atomics, 3483 Dunhill Street, San Diego, CA 92121 (United States)
Publication Date:
OSTI Identifier:
22992107
Resource Type:
Journal Article
Journal Name:
Transactions of the American Nuclear Society
Additional Journal Information:
Journal Volume: 114; Journal Issue: 1; Conference: Annual Meeting of the American Nuclear Society. Embedded topical meeting 'Nuclear fuels and structural material for the next generation nuclear reactors', New Orleans, LA (United States), 12-16 Jun 2016; Other Information: Country of input: France; 5 refs.; Available from American Nuclear Society - ANS, 555 North Kensington Avenue, La Grange Park, IL 60526 United States; Journal ID: ISSN 0003-018X
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 42 ENGINEERING; ACCIDENT-TOLERANT NUCLEAR FUELS; ATOMIC DISPLACEMENTS; CHEMICAL VAPOR DEPOSITION; DIFFUSION; IRRADIATION; MICROSTRUCTURE; POLYMERS; SHEAR; SHEAR PROPERTIES; SILICON CARBIDES; TESTING; WATER COOLED REACTORS; WATER MODERATED REACTORS

Citation Formats

Koyanagi, Takaaki, Katoh, Yutai, Kiggans, James O., Hinoki, Tatsuya, and Back, Christina A. Radiation Tolerance of Silicon Carbide Joints at LWR Relevant Temperature. United States: N. p., 2016. Web.
Koyanagi, Takaaki, Katoh, Yutai, Kiggans, James O., Hinoki, Tatsuya, & Back, Christina A. Radiation Tolerance of Silicon Carbide Joints at LWR Relevant Temperature. United States.
Koyanagi, Takaaki, Katoh, Yutai, Kiggans, James O., Hinoki, Tatsuya, and Back, Christina A. 2016. "Radiation Tolerance of Silicon Carbide Joints at LWR Relevant Temperature". United States.
@article{osti_22992107,
title = {Radiation Tolerance of Silicon Carbide Joints at LWR Relevant Temperature},
author = {Koyanagi, Takaaki and Katoh, Yutai and Kiggans, James O. and Hinoki, Tatsuya and Back, Christina A.},
abstractNote = {The development of reliable joints in reactor service conditions is a critical requirement for SiC based accident tolerant fuels and core structures for light water reactor (LWR) applications. The effects of neutron irradiation on the mechanical properties is an important consideration under normal operation. Though various SiC joints retained the strength following neutron irradiation at ∼500 and ∼800 deg. C to ∼3 dpa, the irradiation tolerance of the joints at the LWR relevant temperature is still an unknown. This study presents the strengths of the candidate SiC joints following irradiation at ∼300 deg. C. The bonding strength was investigated using torsional shear testing which was developed for miniature irradiation specimens in previous work. Torsional shear strengths of various SiC joints were evaluated following irradiation at 270-310 deg. C to 8.7 dpa. Strength degradation by the irradiation likely occurred in the Mo diffusion bond. No obvious strength degradation was found in the MAX phase and hybrid polymer/CVD joints. The irradiation caused large deviation of the strength of Ti diffusion bond, TEP slurry and tape joints. The cause of this deviation will be investigated based on microstructural analysis in future work. (authors)},
doi = {},
url = {https://www.osti.gov/biblio/22992107}, journal = {Transactions of the American Nuclear Society},
issn = {0003-018X},
number = 1,
volume = 114,
place = {United States},
year = {2016},
month = {6}
}