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[en] The Nuclear Damage Compensation and Decommissioning Facilitation Corporation (NDF) was set up by Japanese Government decision in August 2014, as an organization specializing in formulation of strategies and provision of technical support by integrating the knowledge and experiences from all over the world with the objectives of safe and steady decommissioning of damaged reactors. Since then efforts have been made to study the specific strategies to address major challenges of decommissioning from the mid-and-long-term viewpoint, and NDF formulated the first version of the “Technical Strategic Plan” in April 2015, and is going to revise and formulate its 2016 version by summer of 2016. The goals of this “Strategic Plan” are to provide a firm technical basis for the government’s mid-and-long-term Roadmap and to serve as an aid for smooth and steady implementation of decommissioning.
[en] IHI has developed a procedure of making an access opening on Biological Shield Wall (hereinafter called BSW) of the first floor in the reactor building. Some organizations have also developed the retrieval methods for top and side access. Top access is to set up the retrieval equipment on the refueling floor where is top of the reactor building. Another method, side access is to deploy those on the first floor. Top access would spend a long time due to long approach between the refueling floor and RPV. Side access is expected to make a shorter way than that of top access, if debris is on the pedestal bottom. Each method will require making a large opening on the building in order to approach fuel debris. In this report, IHI introduces a plan of making an access opening on the BSW in side access. (authors)