Fabrication of Li2TiO3 pebbles by a freeze drying process

Lee, Sang-Jin; Park, Yi-Hyun; Yu, Min-Woo

doi:10.1016/j.fusengdes.2013.09.003

Cited by 24 publications

(2 citation statements)

References 13 publications

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“…Several conceptual solid breeder blanket designs have been developed worldwide [5][6][7][8][9][10], which will be tested in ITER. The Indian HCCB blanket concept is a modular one with ten breeder units (BU) arranged in a 5×2 matrix arrangement, as shown in figure 1(a).…”

Section: Description Of the Hccb Modulementioning

confidence: 99%

Comparative studies for two different orientations of pebble bed in an HCCB blanket

Chaudhuri¹,

Danani²,

Rajendrakumar

2017

Plasma Sci. Technol.

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The Indian Test Blanket Module (TBM) program in ITER is one of the major steps in its fusion reactor program towards DEMO and the future fusion power reactor vision. Research and development (R&D) is focused on two types of breeding blanket concepts: lead-lithium ceramic breeder (LLCB) and helium-cooled ceramic breeder (HCCB) blanket systems for the DEMO reactor. As part of the ITER-TBM program, the LLCB concept will be tested in one-half of ITER port no. 2, whose materials and technologies will be tested during ITER operation. The HCCB concept is a variant of the solid breeder blanket, which is presently part of our domestic R&D program for DEMO relevant technology development. In the HCCB concept Li 2 TiO 3 and beryllium are used as the tritium breeder and neutron multiplier, respectively, in the form of a packed bed having edge-on configuration with reduced activation ferritic martensitic steel as the structural material. In this paper two design schemes, mainly two different orientations of pebble beds, are discussed. In the current concept (case-1), the ceramic breeder beds are kept horizontal in the toroidal-radial direction. Due to gravity, the pebbles may settle down at the bottom and create a finite gap between the pebbles and the top cooling plate, which will affect the heat transfer between them. In the alternate design concept (case-2), the pebble bed is vertically (poloidal-radial) orientated where the side plates act as cooling plates instead of top and bottom plates. These two design variants are analyzed analytically and 2D thermal-hydraulic simulation studies are carried out with ANSYS, using the heat loads obtained from neutronic calculations. Based on the analysis the performance is compared and details of the thermal and radiative heat transfer studies are also discussed in this paper.

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Section: Description Of the Hccb Modulementioning

confidence: 99%

Comparative studies for two different orientations of pebble bed in an HCCB blanket

Chaudhuri¹,

Danani²,

Rajendrakumar

2017

Plasma Sci. Technol.

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“…The mechanical properties and the microstructures of fabricated pebbles were surveyed in those works to estimate the fabrication utility [5][6][7]. Microstructures of the cross-section of pebbles showed not only many grains combined with each other but also the voids which are socalled the pores.…”

Section: Introductionmentioning

confidence: 99%

Development of the Tritium Transport Model for Pebbles of Li<sub>2</sub>TiO<sub>3</sub>

Kobayashi

Oya

2018

Plasma and Fusion Research

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Tritium transport code in Li 2 TiO 3 pebbles were developed in this study. In the simulation code, tritium transports in a grain, a closed-pore and an opened-pore were modeled and combined. The tritium transport in grain was modeled by the tritium diffusion, trapping/detrapping by defects, and the annihilation process of defects. The adsorption/desorption equilibrium of diffusing tritium gas molecule was modeled for the tritium transports in opened-pores. A vacant-core and shell model was used to model the tritium transport in closedpores. The results by simulation code suggested that the tritium trapping by closed-pores would result in the shift of tritium release toward higher temperature side as dissociation of tritium gas molecule in closed-pores requires higher activation energy.

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The optimal condition for H2TiO3–lithium adsorbent preparation and Li+ adsorption confirmed by an orthogonal test design

Gong

Zhang

Zhou

et al. 2015

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Fabrication of Li2TiO3 pebbles by a freeze drying process

Cited by 24 publications

References 13 publications

Comparative studies for two different orientations of pebble bed in an HCCB blanket

Comparative studies for two different orientations of pebble bed in an HCCB blanket

Development of the Tritium Transport Model for Pebbles of Li<sub>2</sub>TiO<sub>3</sub>

The optimal condition for H2TiO3–lithium adsorbent preparation and Li+ adsorption confirmed by an orthogonal test design

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