This article examined 1F decommissioning policy from a viewpoint of the social science and from a history of the governance of TMI-2 Cleanup Program in U.S.A. This article performed comparative analysis with partnership type decommissioning governance of TMI-2 based on the GEND agreement and the central government-led model decommissioning governance of 1F. The author got the following 3 important conclusions. Firstly, the improvement and innovation of the 1F decommissioning governance, based upon scientific examination and the discussion by a variety of people concerned are necessary. The second is importance of the formation of “Ba (place) of Dialogue” with the local communities. By the decision of the expert committee which lacked in “Ba of Dialogue” with the local communities, it cannot breed the social acceptance and social understanding. The third is importance of the recognition of the problem of Trans-Scientific Questions. There are not the measures without the recognition of the question.