A system dynamics model for stock and flow of tritium in fusion power plant

Ryuta Kasada, Saerom Kwon, Satoshi Konishi, Yoshiteru Sakamoto, Toshihiko Yamanishi, Kenji Tobita

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


In order to analyze self-efficiency of tritium fuel cycle (TFC) and share the systems thinking of TFC among researchers and engineers in the vast area of fusion reactor technology, we develop a system dynamics (SD) TFC model using a commercial software STELLA. The SD-TFC model is illustrated as a pipe diagram which consists of tritium stocks, such as plasma, fuel clean up, isotope separation, fueling with storage and blanket, and pipes connecting among them. By using this model, we survey a possibility of D-D start-up without initial loading of tritium on two kinds of fusion plant having different plasma parameters. The D-D start-up scenario can reduce the necessity of initial loading of tritium through the production in plasma by D-D reaction and in breeding blanket by D-D neutron. The model is also used for considering operation scenario to avoid excess stock of tritium which must be produced at tritium breeding ratio over unity.

Original languageEnglish
Pages (from-to)1804-1807
Number of pages4
JournalFusion Engineering and Design
Publication statusPublished - 2015 Oct 1
Externally publishedYes


  • Fuel cycle
  • Fusion reactor
  • System dynamics
  • Tritium

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Nuclear Energy and Engineering
  • Materials Science(all)
  • Mechanical Engineering


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