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Title: Experimental design and analysis for irradiation of SiC/SiC composite tubes under a prototypic high heat flux

Abstract

The purpose of this work is to design an irradiation vehicle for testing silicon carbide (SiC) fiber-reinforced SiC matrix composite cladding materials under conditions representative of a light water reactor in order to validate thermo-mechanical models of stress states in these materials due to irradiation swelling and differential thermal expansion. The design allows for a constant tube outer surface temperature in the range of 300–350 °C under a representative high heat flux (~0.66 MW/m 2) during one cycle of irradiation in an un-instrumented “rabbit” capsule in the High Flux Isotope Reactor. An engineered aluminum foil was developed to absorb the expansion of the cladding tubes, due to irradiation swelling, without changing the thermal resistance of the gap between the cladding and irradiation capsule. Finite-element analyses of the capsule were performed, and the models used to calculate thermal contact resistance were validated by out-of-pile testing and post-irradiation examination of the foils and passive SiC thermometry. Six irradiated cladding tubes (both monoliths and composites) were irradiated and subsequently disassembled in a hot cell. The calculated temperatures of passive SiC thermometry inside the capsules showed good agreement with temperatures measured post-irradiation, with two calculated temperatures falling within 10 °C of experimental measurements. Furthermore,more » the success of this design could lead to new opportunities for irradiation applications with materials that suffer from irradiation swelling, creep, or other dimensional changes that can affect the specimen temperature during irradiation.« less

Authors:
ORCiD logo [1];  [1];  [1];  [2];  [1];  [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. General Atomics, San Diego, CA (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Nuclear Energy (NE); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1356893
DOE Contract Number:
AC05-00OR22725
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Nuclear Materials; Journal Volume: 491; Journal Issue: C
Country of Publication:
United States
Language:
English
Subject:
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS; 21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS; silicon; carbide; cladding; irradiation; design; composite

Citation Formats

Petrie, Christian M., Koyanagi, Takaaki, McDuffee, Joel L., Deck, Christian P., Katoh, Yutai, and Terrani, Kurt A. Experimental design and analysis for irradiation of SiC/SiC composite tubes under a prototypic high heat flux. United States: N. p., 2017. Web. doi:10.1016/j.jnucmat.2017.04.058.
Petrie, Christian M., Koyanagi, Takaaki, McDuffee, Joel L., Deck, Christian P., Katoh, Yutai, & Terrani, Kurt A. Experimental design and analysis for irradiation of SiC/SiC composite tubes under a prototypic high heat flux. United States. doi:10.1016/j.jnucmat.2017.04.058.
Petrie, Christian M., Koyanagi, Takaaki, McDuffee, Joel L., Deck, Christian P., Katoh, Yutai, and Terrani, Kurt A. Thu . "Experimental design and analysis for irradiation of SiC/SiC composite tubes under a prototypic high heat flux". United States. doi:10.1016/j.jnucmat.2017.04.058.
@article{osti_1356893,
title = {Experimental design and analysis for irradiation of SiC/SiC composite tubes under a prototypic high heat flux},
author = {Petrie, Christian M. and Koyanagi, Takaaki and McDuffee, Joel L. and Deck, Christian P. and Katoh, Yutai and Terrani, Kurt A.},
abstractNote = {The purpose of this work is to design an irradiation vehicle for testing silicon carbide (SiC) fiber-reinforced SiC matrix composite cladding materials under conditions representative of a light water reactor in order to validate thermo-mechanical models of stress states in these materials due to irradiation swelling and differential thermal expansion. The design allows for a constant tube outer surface temperature in the range of 300–350 °C under a representative high heat flux (~0.66 MW/m2) during one cycle of irradiation in an un-instrumented “rabbit” capsule in the High Flux Isotope Reactor. An engineered aluminum foil was developed to absorb the expansion of the cladding tubes, due to irradiation swelling, without changing the thermal resistance of the gap between the cladding and irradiation capsule. Finite-element analyses of the capsule were performed, and the models used to calculate thermal contact resistance were validated by out-of-pile testing and post-irradiation examination of the foils and passive SiC thermometry. Six irradiated cladding tubes (both monoliths and composites) were irradiated and subsequently disassembled in a hot cell. The calculated temperatures of passive SiC thermometry inside the capsules showed good agreement with temperatures measured post-irradiation, with two calculated temperatures falling within 10 °C of experimental measurements. Furthermore, the success of this design could lead to new opportunities for irradiation applications with materials that suffer from irradiation swelling, creep, or other dimensional changes that can affect the specimen temperature during irradiation.},
doi = {10.1016/j.jnucmat.2017.04.058},
journal = {Journal of Nuclear Materials},
number = C,
volume = 491,
place = {United States},
year = {Thu May 04 00:00:00 EDT 2017},
month = {Thu May 04 00:00:00 EDT 2017}
}