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

Fuel retrieval from spent fuel pools, etc.

　Retrieval of fuels in the spent fuel pool of unit 4 has been completed. Preparations for the fuel retrieval in the spent fuel pools of unit 3 and others are currently in progress.

　Although it is supposed that salt stemmed from seawater has adhered to the spent fuel in the pools and some fuels are likely to be physically damaged due to the fallen concrete rubbles, it is proven by monitoring water quality that leakage of radioactive materials has not occurred.

　Fuel assemblies retrieved from the spent fuel pools are planned to be stored in common pools and dry cask storage facilities safely for a long time. R&D on the evaluation of long-term integrity for it was developed.

R&D efforts

Fuel debris retrieval from spent fuel pools

Plant investigation, measurement data, and information

Plant-related parameters (water level, pressure, temperature, etc.)

• Newest data (TEPCO)

• Plant-related parameters (Summary table) (PDF)
• Temperature parameters (Chart) Real-time data

• Unit 1 Temperature in the RPV
• Unit 1 Temperature in the PCV
• Unit 2 Temperature in the RPV
• Unit 2 Temperature in the PCV
• Unit 3 Temperature in the RPV
• Unit 3 Temperature in the PCV

• Fukushima Daiichi NPS plant data collected at the time of the accident(TEPCO)
• The Great East Japan Earthquake and Current Status of Nuclear Power Station(TEPCO)

Fukushima Daiichi NPS survey map

• Inside reactor buildings, etc. (TEPCO)

Common data presented by Benchmark Study of the Accident at the Fukushima Daiichi Nuclear Power Plant (BSAF) related to accident progression analysis according to OECD/NEA (in English)

• Plant basic data (reactor core, fuel, control rods, RPV, PCV, circulating water system, main steam system, etc.) March 2015

• Unit 1 (PDF)
• Unit 2 (PDF)
• Unit 3 (PDF)