Seoul will send a letter outlining its grave concerns to neighboring countries and ask the International Atomic Energy Agency (IAEA) to play a greater role in this problem.

The IAEA needs to cooperate internationally on this matter, the director-general stressed. He added South Korea plans to send a delegation led by First Vice Science Minister Mun Mi-ock to the IAEA's general conference in Vienna from Sept. 16-20 to deliver a keynote speech on the matter and highlight the importance of the issue to other countries.

South Korea's latest move comes as Japan said earlier it could release contaminated water from the power plant in the northeastern part of Honshu that was devastated by an earthquake triggered tsunami in March 2011.

The damage caused by the towering waves led to a meltdown of three of the plant's six reactors with the subsequent release of radioactive materials into the surrounding environment being rated as the worst nuclear disaster since the 1986 Chernobyl meltdown.

Water discharge is seen as the easiest and most affordable way for Japan to deal with the problem, although other methods, like evaporation and expanding storage facilities, have been proposed.

South Korea's Nuclear Safety and Security Commission has said that Tokyo has not made a definitive decision on when it will discharge the water.

The Tokyo Electric Power Co., the company in charge of the power plant, admitted in 2018 that it found traces of radioactive tritium and other elements in the water used in its cleanup effort, despite the liquid being treated before being placed in storage. 

The announcement by the science ministry also follows repeated calls made in the past by South Korea to urge Japan to seriously consider the fallout of the disposal of contaminated water.

Seoul has also requested that the Japanese government become more open and explain in detail to the world at large and to its own people how it will move forward on the Fukushima issue. (Yonhap)