When Japan discharged radioactive contaminated water from the Fukushima nuclear power plant, it was confirmed that the mission time of our naval ship was reduced by more than two-thirds.



Naval ships use a device called a tide to create fresh water by filtering sodium chloride and impurities from seawater, because the tide machine cannot filter out radioactive substances.



When Japanese radioactive water comes to our seas, the alternative is to sail with a water tank full of water, and the Navy's own investigation revealed that it was possible to sail for an average of five days with a full tank.



This would require less than two-thirds of the operations and training that you typically sail for more than two weeks.



The Navy plans to replenish water for ships with logistical support ships, but only four logistical support ships will water 150 ships.



However, submarines are structurally unable to supply water as a logistical support ship, and due to the narrow internal space, the capacity of the water tank is small, and it is expected that it will suffer a major obstacle in training and operations.