In discussing sustainability, it has been proposed to evaluate it from three perspectives: environmental, economic, and social. Therefore, we devised a method to evaluate the social aspect (expectations and anxiety given to society = social acceptance) using the Triple I, a sustainability index that can evaluate the two perspectives of environment and economy, and evaluated each power generation technology in Japan using this method.

　In the development of future energy technologies, high social acceptability is required. In this presentation, I will introduce the current status of fusion energy development as a next-generation energy source, and outline the derivation of a utility function that expresses the degree of satisfaction of the general public with each evaluation item (economic efficiency, amount of resources, environmental impact, sense of security, etc.) of power generation technology, which was conducted as an effort to achieve the high social acceptability required for practical application. This paper outlines the derivation of the utility function, which represents the level of satisfaction of the general public with each evaluation item of power generation technology (economic efficiency, amount of resources, environmental impact, sense of security, etc.).

　The phenomenon of not being able to find a partner for joint research (development gap) often occurs even though new possibilities are apparent when presenting the results of research to companies for practical use. The lack of a partner is also a proof of novelty, which is explained by the concept of "effective frontier of technology transfer.