Fuel Removal from Unit 1 Spent Fuel Pool
The spent fuel pool in the upper part of the reactor building stores fuel rod assemblies that were used to generate electric power. At Unit 1, where a hydrogen explosion occurred, a cover was installed over the entire reactor building in October 2011, to prevent the scattering of radioactive materials from the building. After that, the work progressed as follows;
・Measures to prevent and mitigate rubble fall on the operating floor were completed in November 2020.
・The dismantling of the building cover (remaining part) that would interfere with the construction of a large cover was completed in June 2021.
・The installation of the large cover for the purpose of suppressing dust dispersion and developing a work environment when removing rubble, and suppressing rainwater inflow was completed in January 2026.
Currently, we are working to install overhead crane, related equipment including dust monitor and air conditioning system in preparation for the full-scale rubble removal.
Fuel removal is scheduled to commence in fiscal years 2027-2028.
Unit 1 Status
Progress Status
Step 1: Survey of internal state
Dismantling of the cover over the reactor building was completed in December 2017, and preparations have been made for rubble removal.
Step 2 Removal of rubble
Removal of rubble from the center portion on the north side of the operating floor, at the upper part of the reactor building, was begun in January 2018.
Work to support the overhead crane and fuel handling machine on the south side of the operating floor was completed in November 2020.
The dismantling of the building cover (remaining part) that would interfere with the construction of the large cover was completed in June 2021.
Step 3 Construction of a large cover
Goiong forward, we plan to construct a large cover that emcompasses the entire building and remove rubble from under the cover.
Step 4 Removal of rubble (overhead crane, etc.)
Step 5 Installation of fuel handling equipment
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Step 6 Removal of spent fuel
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Completed
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