The operator noticed water leaking from the axis seal region of the law water pump water desalination facility (RO membrane unit) 2 of the water treatment system.
Tepco has shut down unit 1 to 3 due to the 11 March earthquake, while units 4 to 6 were closed due to regular inspections.
The operator has also compiled a roadmap towards restoration from the accident and updated the progress status of roadmap considering the current situation on 19 July.