Key achievements in elementary R&D on water-cooled solid breeder blanket for ITER test blanket module in JAERI

S. Suzuki, M. Enoeda, T. Hatano, T. Hirose, K. Hayashi, H. Tanigawa, K. Ochiai, T. Nishitani, K. Tobita, M. Akiba

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


This paper presents the significant progress made in the research and development (R&D) of key technologies on the water-cooled solid breeder blanket for the ITER test blanket modules in JAERI. Development of module fabrication technology, bonding technology of armours, measurement of thermo-mechanical properties of pebble beds, neutronics studies on a blanket module mockup and tritium release behaviour from a Li2TiO3 pebble bed under neutron-pulsed operation conditions are summarized. With the improvement of the heat treatment process for blanket module fabrication, a fine-grained microstructure of F82H can be obtained by homogenizing it at 1150 °C followed by normalizing it at 930 °C after the hot isostatic pressing process. Moreover, a promising bonding process for a tungsten armour and an F82H structural material was developed using a solid-state bonding method based on uniaxial hot compression without any artificial compliant layer. As a result of high heat flux tests of F82H first wall mockups, it has been confirmed that a fatigue lifetime correlation, which was developed for the ITER divertor, can be made applicable for the F82H first wall mockup. As for R&D on the breeder material, Li2TiO3, the effect of compression loads on effective thermal conductivity of pebble beds has been clarified for the Li 2TiO3 pebble bed. The tritium breeding ratio of a simulated multi-layer blanket structure has successfully been measured using 14 MeV neutrons with an accuracy of 10%. The tritium release rate from the Li 2TiO3 pebble has also been successfully measured with pulsed neutron irradiation, which simulates ITER operation.

Original languageEnglish
Pages (from-to)285-290
Number of pages6
JournalNuclear Fusion
Issue number2
Publication statusPublished - 2006 Feb 1
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Condensed Matter Physics


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