Presentation Information
[AP5-04-INV]Conceptual Design Study for Japanese Fusion DEMO Reactor
*Hiroyasu Utoh1 (1. National Institutes for Quantum Science and Technology (Japan))
Keywords:
Fusion DEMO,TF coil,large coil,LTS
This paper reports a conceptual design study for a downsized fusion DEMO reactor. It is very important
to conduct power generation demonstrations as early as possible for early social implementation of
fusion energy. For a DEMO reactor with a mission of power generation demonstration, the reactor size,
which is larger than the ITER currently under construction, entails a longer construction period and
development risk due to its larger size. Based on the system code analysis, this conceptual design study
investigated a reactor concept that can both demonstrate power generation and tritium self-breeding in
an ITER-size DEMO reactor. By improving the in-vessel components step by step in a single device,
the DEMO rector concept was presented that could achieve a net electric power of more than 0 with
ITER-like parameters in Phase I, demonstrate comprehensive tritium breeding for self-realization with
JA DEMO-like parameters in Phase II, and achieve the net electric power of 100 MW-class with JT-
60SA-like parameters in Phase III. In addition, by evaluating the impact of key components for
miniaturization in the DEMO reactor, such as superconducting magnets and blanket, the R&D items
that are important for miniaturization of the reactor were clarified.
to conduct power generation demonstrations as early as possible for early social implementation of
fusion energy. For a DEMO reactor with a mission of power generation demonstration, the reactor size,
which is larger than the ITER currently under construction, entails a longer construction period and
development risk due to its larger size. Based on the system code analysis, this conceptual design study
investigated a reactor concept that can both demonstrate power generation and tritium self-breeding in
an ITER-size DEMO reactor. By improving the in-vessel components step by step in a single device,
the DEMO rector concept was presented that could achieve a net electric power of more than 0 with
ITER-like parameters in Phase I, demonstrate comprehensive tritium breeding for self-realization with
JA DEMO-like parameters in Phase II, and achieve the net electric power of 100 MW-class with JT-
60SA-like parameters in Phase III. In addition, by evaluating the impact of key components for
miniaturization in the DEMO reactor, such as superconducting magnets and blanket, the R&D items
that are important for miniaturization of the reactor were clarified.