Information Portal for the Research and Development
for the Fukushima Daiichi Decommissioning

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Development of remote decontamination equipment

R&D efforts (Applied development linked to plant applications and actual use)

Completed projects

Development of Remote Equipment Maintenance Technology (Project of Decommissioning and Contaminated Water Management)

Summary

In order to ensure safe and reliable operation continuity over a long period of time in the further expansion in scale for retrieval of fuel debris and internal structures, we develop remote equipment maintenance technology for necessary including the viewpoints such as rational design of remote equipment related to the reasonable design and reduction of wastes.

Action

Development of remote decontamination / maintenance technology for contaminated equipment

Implementation plan

Source:FY 2022 Research and Development Plan for Decommissoning
　　　　(METI, Secretariat of the Team for Countermeasures for Decommissioning and Contaminated Water Treatment (January 27, 2022)) (PDF page 13)

Results & performance by fiscal year

• FY 2022

• Status of progress at the end of February 2023 (METI, Secretariat of the Team for Countermeasures for Decommissioning and Contaminated Water Treatment (February 22, 2023)) (PDF page 29)

• FY 2021

• Status of progress at the end of January 2022 (METI, Secretariat of the Team for Countermeasures for Decommissioning and Contaminated Water Treatment (January 27, 2022)) (PDF page 30)

Development of Remote Decontamination Equipment (Project of Decommissioning and Contaminated Water Management)

Summary

Remote decontamination technology is important as a core method for removing contamination of radioactive materials from inside reactor buildings in order that work can be carried out continuously within reactor buildings for decommissioning. Remote decontamination technology development is completed for low areas on the first floor, but in order to further effectively reduce spatial dose rates, we developed the decontamination equipment that can handle a variety of objects and forms of contamination in high places (ceilings, etc.), and the second and upper floors.

1. Development of decontamination equipment for low places＜Development complete＞
2. Development of decontamination equipment for high places
3. Development of decontamination equipment for upper stories
4. Development proposal for decontamination equipment for belowground stories

Implementing organization

Implemented by IRID.

Implementation plan

Source:Progress status of R&D projects and direction for next period
　　　　(METI, Secretariat of the Team for Countermeasures for Decommissioning and Contaminated Water Treatment (February 26, 2015)) (PDF page 2)

Results & performance by fiscal year

• FY 2016

• Validation result of the actual device: decontamination equipment for high places in Unit 3 reactor building first floor (by dry ice blast) (METI, Secretariat of the Team for Countermeasures for Decommissioning and Contaminated Water Treatment (May 26, 2016)) (PDF)

• FY 2015

• Completion report (Development of remote decontamination technology for inside reactor buildings (March 2016)) (IRID) (PDF)
• Progress status at the end of February 2016 (METI Secretariat of the Team for Countermeasures for Decommissioning and Contaminated Water Treatment (February 25, 2016)) (PDF page 48)
• Development status image for remote decontamination technology and remote decontamination equipment (March 2016) (IRID) (PDF page 4)
• Development of decontamination equipment for upper floors of the reactor building at the Fukushima Daiichi NPS (December 16, 2015) (IRID)
• Development and utilization of dry ice blast decontamination equipment for high places (September 8, 2015) (IRID)

• FY 2014

• Summary of results (METI, Secretariat of the Team for Countermeasures for Decommissioning and Contaminated Water Treatment (February 26, 2015)) (PDF page 2)

• FY 2013

• “MEISTeR” remote control robot completes demonstration testing at Fukushima Daiichi NPS (March 25, 2014) (IRID)

• FY 2012

• Summary of results (METI, Secretariat of The Council for the Decommissioning of TEPCO’s Fukushima Daiichi (March 28, 2013)) (PDF page 14)

Results & performance for individual projects, etc. (Archives) (including efforts by TEPCO)

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R&D efforts (related basic and generic research)

Research on remote technology (Decommissioning Basic Research: Human resource development program at Tohoku University- Basic research into reliability maintenance of PCV and buildings, etc., and waste processing and disposal, and core human resource development program for decommissioning)

Robotic and remote operation technology for responding to accidents in nuclear power stations and decommissioning equipment (Decommissioning Basic Research: Human resource development program at University of Tokyo - Comprehensive human resource development for decommissioning based on remote operations technology and nuclide analysis technology) (PDF)

Environmental structuring technology for remotely operated robots (Decommissioning Basic Research: Human resource development program at University of Tokyo - Comprehensive human resource development for decommissioning based on remote operations technology and nuclide analysis technology) (PDF)

Development of remotely operated robots for inspections of high places and narrow spaces (Decommissioning Basic Research: Human resource development program at Tohoku University - Comprehensive human resource development for decommissioning based on remote operations technology and nuclide analysis technology) (PDF)

Remote measurement technology for after severe accidents (Decommissioning Basic Research: Human resource development program at Tokyo Institute of Technology - Advancements in skilled human resource development for and basic research on decommissioning engineering (PDF)

Implementation design of verification test facilities for remote operations machinery and equipment (August 2015) (JAEA)

Development of detective technology of contaminated spots in working area, and visualization technology to virtual space (August 2018) (JAEA) (PDF) new

Plant investigation, measurement data, and information

Decontamination within buildings

• Fukushima Daiichi NPS survey map

• Inside reactor buildings, etc. (TEPCO)

Dose rate reduction within the site

• Efforts towards environmental dose rate reduction (Updated monthly) new (Updated December 11, 2024)
  (METI, Secretariat of the Team for Countermeasures for Decommissioning and Contaminated Water Treatment)

• Environmental dose rate reduction countermeasures schedule(December 26, 2024) (PDF) Only Japanese

• Mid-to-long term implementation policies for dose rate reduction within site (January 2014) (PDF)

Other related information

Operational results for remote technology at Fukushima Daiichi NPS (Agency for Natural Resources and Energy) only japanese

Utilization of robotic technology (TEPCO) only japanese

• Results for robots used primarily on the first floor and higher only japanese
• Results for robots used mainly on below-ground floors only japanese

Robot technology by purpose

• Transfer/transport technology

• Crab cranes
  ”Development of remote decontamination technology for inside reactor buildings” regarding investigation of contamination status in high places on first floor within Units 1 to 3 reactor buildings (inspection with gamma camera) (May 29, 2014) (TEPCO) (PDF page 2) only japanese

• Rosemary & Sakura, robots with dose rate meter/gamma camera, etc., mounted
  ”Development of remote decontamination technology for use within reactor buildings” regarding investigation of contamination status in high places on upper floors within Units 1 to 3 reactor buildings (inspection using dose rate meter and gamma camera) (May 29, 2014) (TEPCO) (PDF page 2) only japanese

• Robot with laser scan, etc., mounted
  Performance of 3D laser scan measurement in Unit 1 reactor building torus room (October 30, 2014) (PDF page 4) only japanese

• Robot with cutting tool, etc., mounted
  Removal of fence and sampling on operating floor of Unit 2 reactor building (results report) (March 27, 2014) (TEPCO) (PDF page 9) only japanese

• Quince 1, 2, & 3, robots with dose rate meter/gamma camera mounted

• Pack Bot, robot with dose rate meter/gamma camera, etc., mounted
  Result of inspection of Unit 1 reactor building with robot from “development of remote decontamination technology inside buidings” (May 25, 2014) (TEPCO) (PDF) only japanese

• Water-surface boat
  Verification test of swim-inspection robot technology development (October 31, 2013) (Remote Technology Task Force WG2　underwater swimming robot WG) (PDF page 4) only japanese

• 4-legged walking robot
  Inspection results of underside of bent pipes in Unit 2 (March 28, 2013) (TEPCO) (PDF page 2) only japanese

• Survey Runner
  Summary of robot (Survey Runner) (April 17, 2012) (TEPCO) (PDF) only japanese

• Inspection and measurement technology

• Equipment to inspect inside PCV (Shape changing robot)
  Observing simulation practice before internal inspection of TEPCO Fukushima Daiichi NPS Unit 1 PCV (February 5, 2015) (IRID / Hitachi GE) (PDF) only japanese

• Robot for investigating high locations
  Inspection results for Unit 2 reactor building first floor high location PCV penetration periphery（Implementation of Step 2) (July 25, 2013) (TEPCO) (PDF page 12) only japanese

• Inspection equipment FRIGO-MA
  Inspection results for Fukushima Daiichi NPS Unit 1 reactor building first floor personal airlock room (April 9, 2013) (TEPCO) (PDF page 2) only japanese

• Suppression chamber lower external area inspection equipment (SC-ROV)
  Results summary for FY2013 “Development of technology for repair and identification of leakage points within PCV” (inspection portion) (October 30, 2014) (IRID) (PDF page 16) only japanese

• Torus room wall inspection equipment, underwater swimming robot (Gengo ROV) and floor walking robot (Tri-diver)
  Results summary for FY2013 “Development of specific and repair technology for leakage points within PCV” (inspection portion) (October 30, 2014) (IRID) (PDF page 4) only japanese

• Suppression chamber upper area inspection equipment (Tele-runner)
  Results summary for FY2013 “Development of technology for repair and identification of leakage points within PCV” (inspection portion) (October 30, 2014) (IRID) (PDF page 5) only japanese

• Water level measurement equipment for inside suppression chamber
  Development of robotic water level measurement basic technology for inside suppression chamber (S/C) and resumption of verification tests (January 30, 2014) (TEPCO) (PDF page 9) only japanese

• Decontamination technology inside buildings

• High pressure water decontamination equipment（Arounder,）absorption/blast decontamination equipment（MEISTeR）, dry ice blast decontamination equipment
  FY2013 results summary, development of remote decontamination equipment for inside reactor buildings (August 28, 2014) (IRID) (PDF page 4) only japanese

• Raccoon
  Use of project results from “Development of technology for remotely operated decontamination inside the reactor buildings” (January 30, 2014) (TEPCO) (PDF page 12) only japanese

• Remotely operated heavy machine ASTACO-SoRa
  Start of inside decontamination in the first floor of the Fukushima Daiichi NPS Unit 3 reactor building using remote decontamination equipment (June 20, 2014) (TEPCO) (PDF page 2) only japanese

• Improved Husqvarna DXR-140
  Introduction of decontamination equipment into the first floor of the Fukushima Daiichi NPS Unit 2 reactor building (June 6, 2014) (TEPCO) (PDF) only japanese

Technology catalog for development of machines and equipment for preparation to retrieve fuel debris for decontamination of TEPCO Fukushima Daiichi NPS Units 1 to 4 (decontamination related) (PDF) only japanese

• Maker survey portion (Table of contents) (PDF) only japanese
• Maker survey portion (Main body) (PDF) only japanese
• Primary public appeal (Table of contents) (PDF) only japanese
• Primary public appeal (Main body)
• Secondary public appeal (Table of contents) (PDF) only japanese
• Secondary public appeal (Main body)