TOP > R&D Topics > Retrieval of Fuel Debris

Investigation inside Primary Containment Vessel (PCV): Development of Submersible Crawling Robot to Survey inside PCV of Fukushima Daiichi Unit 3 [Development by TOSHIBA] (June 15, 2017)

Jun.15,2017

As part of the decommissioning activities for the Fukushima Daiichi Nuclear Power Station, operated by Tokyo Electric Power Co., (TEPCO), a small submersible crawling robot was developed to investigate the internal surroundings of the pedestal, under the Reactor Pressure Vessel (RPV), in the PCV of Unit 3, where coolant water had accumulated. The robot was released to the media on June 15, 2017.

Study on Fuel Debris Retrieval Method: “Reactor Pressure Vessel 1/1 Scale Model Test”, etc. [Development by Hitachi GE Nuclear Energy] (April 2017)

Apr.17,2017

As part of its R&D efforts for the decommissioning of the Fukushima Daiichi Nuclear Power Station (NPS), the IRID (development by Hitachi GE Nuclear Energy) is involved in developing fundamental technologies for the retrieval and removal of fuel debris and internal reactor structures, and subsidizing costs for the Decommissioning and Contaminated Water Management Project.

Development of Robot “PMORPH” for Investigation inside Unit 1 Primary Containment Vessel (PCV) (Investigation outside Pedestal Basement: B2 Investigation) [Developed by IRID and Hitachi GE Nuclear Energy] (February 3, 2017)

Feb.03,2017

The “PMORPH”, developed by IRID and Hitachi-GE Nuclear Energy, was presented to the media on February 3. The device, equipped with a dosimeter and underwater camera, will be used to investigate outside the Unit 1 pedestal basement in the PCV, in which fuel debris may have spread to, towards decommissioning TEPCO’s Fukushima Daiichi Nuclear Power Station (NPS).

Full-scale Testing of Technology for Repairing PCV Leakage Points
Full-scale Testing of Strengthening Technology for Suppression Chamber (S/C) Support Columns [IRID/Hitachi GE Nuclear Energy] (November 29, 2016)

Nov.29,2016

IRID is engaged in ongoing development of technology for repairing leakage points in the Primary Containment Vessel (PCV) under a project sponsored by the Ministry of Economy, Trade and Industry (METI) for the FY2016-2017 period towards the decommissioning of the Fukushima Daiichi Nuclear Power Station.

Development of Repair Technology for Water Leakage Sections in PCV Testing Concrete Injection Technology for Water Leak Stoppage Treatment inside Suppression Chamber Using Full-Scale Mock-up Facility [Led by TOSHIBA]. (October 15, 2016)

Oct.15,2016

IRID is advancing the development of repair technology for water leakage sections in the Primary Containment Vessel (PCV) under a project led by Ministry of Economy, Trade and Industry (METI) in FY 2016-FY 2017 towards the decommissioning of the Fukushima Daiichi Nuclear Power Station (NPS). As a part of this project, a method of injecting concrete to repair water leakage points inside suppression chamber (S/C), a structure that lies at the lower part of the PCV, is currently being examined.

Completion of Preparation for Full-Scale Test Facility Simulating the Lower Part of the PCV and Future Test Plans (October 13, 2016)

Oct.13,2016

A full-scale mock-up facility* is now ready for testing purposes to establish technology for repairing water leakage points in the lower part of the Primary Containment Vessel (PCV).

* This test facility simulates vent pipes, the suppression chamber (S/C), and torus room wall found in the lower part of the PCV in Fukushima Daiichi Nuclear Power Station (NPS) Unit 2. The facility is of full-scale size, but represents a 1/8 portion of the circular S/C.