Drag the screen for a 360° view.
Dose levels in the vicinity
μSv/h
What is this facility?
This is a freezer room, it is a facility for lowering the temperature of coolant used to create an ice wall (land-side
impermeable wall) to -30°C .
The coolant passes through pipes that enclose Units 1~4.
This underground ice wall, which is 1,500m long in total and extends 30m below the surface, was created to block the
flow of groundwater.
Land-side impermeable wallCross-section of ground
To what temperature is the ground frozen?
About -10°C.
Doesn’t the wall melt in summer?
No, it doesn’t, because the ice wall is underground, which is less affected by the external air.
And, coolant temperature is maintained 24/7.
How is the coolant channeled to the area surrounding Units 1~4?
Pipes that encompass Units 1~4 under the ground are used to circulate coolant.
What other countermeasures are being implemented to prevent the generation of contaminated water?
For example, groundwater flowing down from the mountains is pumped up using wells that comprise a groundwater bypass and
discharged outside the port.
Groundwater flowing near the buildings is pumped up and discharged into the port using sub-drain wells.
And, ground surfaces are being paved or faced to prevent rainwater falling on-site from seeping into the ground and
becoming groundwater.
View Map
- Guide 01Entrance to 1F
- Guide 02Site-only vehicles
- Guide 03High ground in front of reactor buildings
- Guide 04Unit 1
- Guide 04Q&A for Unit 1
- Guide 05Unit 2
- Guide 05Q&A for Unit 2
- Guide 06Unit 3
- Guide 06Q&A for Unit 3
- Guide 07Unit 4
- Guide 07Q&A for Unit 4
- Guide 08Facing
- Guide 09Near the Units 2 and 3
- Guide 10Unit 5
- Guide 10Inside the Unit 5
Reactor Building (360°) - Guide 11Inside the Primary Containment Vessel
- Guide 11Q&A for Inside the Primary Containment Vessel(360°)
- Guide 12Fuel debris investigation
- Guide 13Unit 1/2 Main control room
- Guide 13Q&A for Unit 1/2 Main control room (360°)
- Guide 14Unit 1/2 exhaust stack
- Guide 15Fuel removal
- Guide 15Q&A for Common pool(360°)
- Guide 16Contaminated water countermeasures
- Guide 16Q&A for Freezer Room (360°)
- Guide 17Tank area
- Guide 17Q&A for Tank area
- Guide 18Overview of ALPS treated water discharge
- Guide 19Multi-nuclide Removal Equipment (ALPS)
- Guide 19Q&A for Multi-nuclide Removal Equipment(360°)
- Guide 20Measurement/Confirmation Facility
- Guide 21Dilution facility and discharge facility
- Guide 21Q&A for Emergency isolation valve(360°)
- Guide 22Sea area monitoring
- Guide 23Marine organisms rearing test
- Guide 24Chemical analysis building
- Guide 25JAEA The Facility for Analysis and Research of Radioactive Materials Laboratory-1
- Guide 26Countermeasures against natural disaster
- Guide 27Main Anti-Earthquake Building
- Guide 28Site preparation for waste treatment facilities
- Guide 29Large rest house
- Guide 30New administration office building
- Guide 31IAEA office
