Design, Fabrication and Performance Test of Heating and Cooling System of JT-60 Vacuum Vessel

Masatsugu Shimizu, Noboru Akino, Masahiro Yamamoto, Hideyuki Takatsu, Minoru Ohkubo, Toshiro Ando, Mitsuru Ohta, Tohru Shimizu, Soji Kajiura, Kiyoshi Matsumoto

Research output: Contribution to journalArticlepeer-review


This report describes design, fabrication and performance test of heating and cooling system of JT-60 vacuum vessel. The vacuum vessel was designed to be bakable up to 500°C by electric heaters as a means of ultra-high vacuum treatments, and was required to be cooled down by water or nitrogen gas. Results of the on-site baking test after assembly of the machine showed that the design requirements for the maximum temperature, temperature difference, heating time, ultimate vacuum and outgassing rate were satisfied, and no leaks were detected with helium leak testing. It was also found that the slide mechanism for thermal expansion during the heating-up and cooling-down phase functioned satisfactorily.

Original languageEnglish
Pages (from-to)1108-1115
Number of pages8
JournalJournal of the Atomic Energy Society of Japan / Atomic Energy Society of Japan
Issue number12
Publication statusPublished - 1987
Externally publishedYes


  • baking
  • cooling
  • cooling system
  • heat transfer
  • JT-60 tokamak
  • performance testing
  • thermonuclear reactor cooling
  • ultimate pressure
  • ultrahigh vacuum
  • vacuum vessel

ASJC Scopus subject areas

  • Nuclear Energy and Engineering


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