Publicly Released Document Archive
Unit 1
February 29, 2024 Primary containment vessel internal investigation (non-submerged area investigation)
March 30, 2023 Primary containment vessel internal investigation (ROV-A2)
Unit 2
Fuel debris trial retrieval (2nd time)
-
August 28, 2025 Analysis of fuel debris properties, etc
Non-destructive analysis results (follow-up report) of fuel debris sample -
May 29, 2025 Analysis of fuel debris properties, etc
Non-destructive analysis results (previous report) of fuel debris sample -
April 24, 2025 Internal investigation/trial retrieval (grasping fuel debris and completion of fuel debris trial retrieval)
PCV Internal Investigation/status of fuel debris trial retrieval -
March 27, 2025 Internal investigation/trial retrieval (telescopic trial retrieval device)
PCV Internal Investigation/status of fuel debris trial retrieval
Fuel debris trial retrieval (1st time)
-
July 31, 2025 Analysis of fuel debris properties, etc
Analysis results of the fuel debris sample (detailed analysis (solid analysis and liquid analysis) ) -
January 30, 2025 Analysis of fuel debris properties, etc
Non-destructive analysis results (follow-up report) of fuel debris sample -
December 26, 2024 Analysis of fuel debris properties, etc
Non-destructive analysis results (previous report) of fuel debris sample (In Japanese only) -
November 28, 2024 Internal investigation/trial retrieval (completion of fuel debris trial retrieval)
PCV Internal Investigation/status of fuel debris trial retrieval -
October 31, 2024 Internal investigation/trial retrieval (grasping fuel debris)
PCV Internal Investigation/status of fuel debris trial retrieval -
July 25, 2024 Internal investigation/trial retrieval (telescopic trial retrieval device)
PCV Internal Investigation/preparation status of fuel debris trial retrieval -
June 27, 2024 Attribute analysis
PCV Internal Investigation/preparation status of fuel debris trial retrieval -
May 30, 2024 Removal of deposits from inside penetration
PCV Internal Investigation/preparation status of fuel debris trial retrieval -
April 25, 2024 Internal investigation/trial retrieval (arm-type trial retrieval device)
PCV Internal Investigation/preparation status of fuel debris trial retrieval -
October 26, 2023 Penetration hatch opening
PCV Internal Investigation/preparation status of fuel debris trial retrieval -
April 27, 2023 Isolation chamber installation
PCV Internal Investigation/preparation status of fuel debris trial retrieval (In Japanese only)
-
February 28, 2019 Deposit contact investigation
Unit 2 Primary containment vessel internal investigation results
-
February 23, 2017 Primary containment vessel internal investigation (Scorpion robot) investigation summary/results
Unit 2 Primary containment vessel internal investigation (In Japanese only) -
February 16, 2017 Primary containment vessel internal investigation (Scorpion robot) investigation results (temperatures/dose)
Unit 2 Primary containment vessel internal investigation ~Results from investigation using self-propelled investigation device~
-
July 28, 2016 Muon investigation
Locating fuel debris inside the Unit 2 reactor using a Muon measurement technology
Unit 3
-
July 31, 2025
Design deliberation for fuel debris retrieval method
-
August 31, 2023 Deliberation of large-scale methods for fuel debris retrieval
Fuel debris retrieval method deliberation (In Japanese only)
