Research and Development of HTTR Coated Particle Fuel.

Fukuda, Kousaku; Ogawa, Teiichiro; Hayashi, K.; Shiozawa, Shusaku; TSURUTA, Harumichi; Tanaka, Isao; Suzuki, Norihiro; Yoshimuta, Shigeharu; Kaneko, Mitsunobu

doi:10.3327/jnst.28.570

Cited by 18 publications

(5 citation statements)

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“…The interested reader is also directed to the many excellent reviews of TRISO performance results [9,14,19,[25][26][27][28][29][30][31][32][33][34]. To provide context for the review of the FPMs Sections 2 and 3 briefly summarize fuel behavior and failure mechanisms.…”

Section: Introductionmentioning

confidence: 99%

A review of TRISO fuel performance models

Powers

Wirth

2010

Journal of Nuclear Materials

158

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Section: Introductionmentioning

confidence: 99%

A review of TRISO fuel performance models

Powers

Wirth

2010

Journal of Nuclear Materials

158

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“…At a desired temperature, reactants are put into the coater to produce a coating layer on the particles fluidized in the coater. The deposition temperatures for the coating layers are 1,650 to 1,900K. Input gases for depositions of porous PyC, IPyC, Sic, and OPyC are acetylene (C2Hz) and argon, propylene (C3Hs) and argon, methyltrichlorosilane (CH3SiC13) and hydrogen (Hz), and propylene and argon, respectively. After a certain time to produce the desired thickness of the layer, the reactant gas supply is replaced by argon.…”

Section: Coating Processmentioning

confidence: 99%

Improvements in Quality of As-Manufactured Fuels for High-Temperature Gas-Cooled Reactors.

Minato

Kikuchi

Tobita

et al. 1997

J. Nucl. Sci. Technol.

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The mechanisms of coating failure of the fuel particles for the high-temperature gas-cooled reactors during coating and compaction processes of the fuel fabrication were studied to determine a way to reduce the defective particle fraction of the as-manufactured fuels. Through the observation of the defective particles, it was found that the coating failure during the coating process was mainly caused by the strong mechanical shocks to the particles given by violent particle fluidization in the coater and by unloading and loading of the particles. The coating failure during the compaction process was probably related to the direct contact with neighboring particles in the fuel compacts. The coating process was improved by optimizing the mode of the particle fluidization and by developing the process without unloading and loading of the particles at intermediate coating process. The compaction process was improved by optimizing the combination of the pressing temperature and the pressing speed of the overcoated particles. Through these modifications of the fabrication process, the quality of the as-manufactured fuel compacts was improved outstandingly.

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“…However, as noted above SiC has known issues with degradation from palladium-SiC interaction (palladium attack) [30], permeability to certain fission products (e.g., silver), and rupture at higher temperatures [31,32]. ZrC has the potential to be an improved barrier layer as compared to SiC for a number of reasons [33], which include resistance to palladium attack [34][35][36], higher melting temperature (3693 K) for ZrC (3123 K carbon eutectic) vs. 2818 K for SiC [37], reduced particle rupture rates at high temperatures [35,38,39], and apparently increased retention of some metal fission products (e.g., silver) [35,38,40,[42][43][44][45].…”

Section: Atomistic Modeling Of Fission Product Transport In Zrcmentioning

confidence: 96%