International Tokamak Reactor – Phase Two A, Part III Executive Summary of the IAEA Workshop, mid-1985 to 1987

The INTOR Workshop started in 1979 with the aim to define, design and construct the next major experiment in the world tokamak programme. The Workshop was organized to run in phases. The paper describes the results of Phase Two A, Part III, which ran from mid-1985 to end 1987 and was concentrated on critical issues affecting the feasibility, objectives and cost of the INTOR design for a tokamak engineering test reactor. The paper also summarizes the results of INTOR Workshop studies on DEMO requirements and innovations which hold the promise to lead to improvements of the tokamak reactor concept. Instead of the updating of the early INTOR conceptual design of Phase One, which is necessary and which was planned for Part III of Phase Two A, a summary is presented which contains all principal conclusions from the work on critical issues and innovations as well as their implications relative to the INTOR design concept. Finally, a critical and comparative analysis of the existing INTOR-like designs is given.