Status of water cooled ceramic breeder blanket development

Kawamura, Y.; Tanigawa, Hisashi; Hirose, Takanori; Gwon, Hyoseong; Nakajima, Mio; Takemura, Makoto; Nakata, Misato; Ishioka, Minoru; Yoshino, S.; Murakami, Hideo; Wakasa, Atsushi; Sato, Satoshi; Ochiai, Kentaro; Nakamura, Hirofumi; Hoshino, Tsuyoshi; Nakamichi, Masaru; Tanigawa, Hiroyasu; Hayashi, T.; Yamanishi, Toshihiko

doi:10.1016/j.fusengdes.2018.05.055

Cited by 14 publications

(5 citation statements)

References 11 publications

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“…A similar concept for the WCLL-WCS is the water coolant circuit of the Japanese Water-Cooled Ceramic Breeder (WCCB) TBM concept. The conceptual design of this system was performed by National Institutes for Quantum and Radiological Science and Technology (QST) [10], and the activity for the preliminary design phase has already started.…”

Section: Framework and State Of The Artmentioning

confidence: 99%

Conceptual design overview of the ITER WCLL Water Cooling System and supporting thermal-hydraulic analysis

Ciurluini

Narcisi

Tincani

et al. 2021

Fusion Engineering and Design

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Section: Framework and State Of The Artmentioning

confidence: 99%

Conceptual design overview of the ITER WCLL Water Cooling System and supporting thermal-hydraulic analysis

Ciurluini

Narcisi

Tincani

et al. 2021

Fusion Engineering and Design

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“…In nuclear energy systems, the core system of a hightemperature gas-cooled reactor is a cylindrical pebble-bed assembly packed with spherical fuel particles [2][3][4]. For a fusion energy reactor, the tritium breeder and neutron multiplier pebbles are packed in rectangular [5], U-shaped [6][7][8], or cylindrical vessels in blanket modules [9][10][11]. In addition, pebble packings are also widely used in some other fields, such as 3D-printing processes [12], pellet sandpiles [13], the packing and combustion processes of biomass fuel particles [14], storage of grain particles [15], solar energy storage systems [16], etc.…”

Section: Introductionmentioning

confidence: 99%

Effects of the Aspect Ratio and Cross-Sectional Area of Rectangular Tubes on Packing Characteristics of Mono-Sized Pebble Beds

et al. 2023

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The packing characteristics of a pebble bed are essential to understand the heat- and mass-transfer processes occurring within a granular system. Therefore, the packing characteristics of rectangular prismatic pebble beds randomly packed with mono-sized pebbles are analyzed. In terms of the average and local packing fraction distribution, coordination number, and radial distribution function, the effects of the rectangular tube aspect ratio and cross-sectional area on the packing properties of pebble beds are explored in depth. The findings indicate that the packing structures of the rectangular pebble bed exhibit noticeable fixed-wall effects. The average packing fraction and coordination number gradually decline as the rectangular tube aspect ratio rises. Close to the fixed wall, a noticeable wall effect can be seen in the distribution of axial and local packing fractions and the pebble center distribution. The wall effect has an increasing effect on the axial and local packing fraction distributions in rectangular tubes with increasing aspect ratios. Additionally, the average packing fraction and the average coordination number also increase as the cross-sectional area increases, indicating a gradual weakening of the wall effect as the cross-sectional area increases. Furthermore, the cross-sectional area and aspect ratio of the rectangular tubes affect the RDF values of the rectangular pebble beds but have no impact on the RDF features. The findings reported in this paper will be helpful for designing and optimizing pebble beds in the breeding blanket of fusion reactors.

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“…To realize tritium self‐supplying in a fusion reactor, tritium breeding materials in test blanket module (TBM) are used to produce tritium during the fusion reaction 2‐4 . When evaluating potential tritium breeder materials, the following parameters need to be given priority: tritium breeding, tritium transport, thermal transport, lithium burn‐up, chemical stability, and compatibility with structural material 5‐9 . Lithium oxide (Li 2 O) demonstrates many advantages as compared with other breeder ceramics, in particular high lithium atomic density, high thermal conductivity, high melting point, and isotropic crystal structure 10‐15 …”

Section: Introductionmentioning

confidence: 99%

Highly efficient preparation of Li₂O breeder materials with core‐shell structure by oil‐based granulation route

Chen

Shi

et al. 2020

J Am Ceram Soc

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This paper gives an oil‐based granulation approach to realize the efficient preparation of Li2O breeder materials, which solve the problems of long preparation cycle, high manufacturing cost and difficult to be homogenization and densification in the past. Li2O precursor spheres with narrow size distribution and uniform spherical shape can be obtained using paraffin oil as binders. The Li2O feed powder with bimodal size distribution will self‐organize to form a core‐shell structured sphere during granulation, in which the core and shell are composed of small particles and large particles, respectively. Notably, the Li2O ceramic spheres sintered at 900°C can achieve a crush load of 40.69 ± 4.01 N and a theoretical density of 79.66% TD, which was not achievable by the methods reported in the previous literature. The strategy proposed in this work not only can be easily extended to other material systems but also opens up a new avenue for the design and preparation of tritium breeder materials with uniform size distribution and satisfactory mechanical properties.

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Status of water cooled ceramic breeder blanket development

Cited by 14 publications

References 11 publications

Conceptual design overview of the ITER WCLL Water Cooling System and supporting thermal-hydraulic analysis

Conceptual design overview of the ITER WCLL Water Cooling System and supporting thermal-hydraulic analysis

Effects of the Aspect Ratio and Cross-Sectional Area of Rectangular Tubes on Packing Characteristics of Mono-Sized Pebble Beds

Highly efficient preparation of Li₂O breeder materials with core‐shell structure by oil‐based granulation route

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Status of water cooled ceramic breeder blanket development

Cited by 14 publications

References 11 publications

Conceptual design overview of the ITER WCLL Water Cooling System and supporting thermal-hydraulic analysis

Conceptual design overview of the ITER WCLL Water Cooling System and supporting thermal-hydraulic analysis

Effects of the Aspect Ratio and Cross-Sectional Area of Rectangular Tubes on Packing Characteristics of Mono-Sized Pebble Beds

Highly efficient preparation of Li2O breeder materials with core‐shell structure by oil‐based granulation route

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Product

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Highly efficient preparation of Li₂O breeder materials with core‐shell structure by oil‐based granulation route