Fukushima nuclear plant will start releasing treated radioactive water into Pacific Ocean as early as Thursday

The Fukushima Daiichi nuclear power plant will start releasing treated and diluted radioactive wastewater into the Pacific Ocean as early as Thursday — a controversial step that the government says is essential for the decades of work needed to clean up the facility that had reactor meltdowns 12 years ago.

Prime Minister Fumio Kishida gave the final go-ahead Tuesday at a meeting of Cabinet ministers involved in the plan and instructed the operator, Tokyo Electric Power Company Holdings, or TEPCO, to be ready to start the coastal release Thursday if weather and sea conditions permit.

Kishida said at the meeting that the release of the water is a key step in the plant decommissioning and Fukushima prefecture’s recovery from the March 11, 2011, earthquake and tsunami disaster.

He said the government has done everything for now to ensure the plan's safety, protect the reputation of Japan's fishing industry and clearly explain the scientific basis of the move. He pledged that the government will continue those efforts until the end of the release and decommissioning, which will take decades.

“The government will take responsibility until the disposal of ALPS-treated water is completed, even if it takes several decades," Kishida said.

In Seoul, Park Ku-yeon, first vice minister of South Korea’s Office for Government Policy Coordination, told a briefing that officials confirmed Japan would discharge the wastewater in line with its initial plan.

If it does not stick to the plan, Park said, South Korea will request Japan to immediately stop the discharge which could threaten safety of South Koreans. Opposition lawmakers and activists protested vehemently, demanding Japan immediately scrap the plan.

Hong Kong and Macau announced that they are banning products from Fukushima and nine other prefectures in response to Tokyo’s announcement Tuesday, while China has stepped up radiation testing on Japanese fisheries products, delaying customs clearance.

A massive earthquake and tsunami destroyed the Fukushima Daiichi plant’s cooling systems, causing three of its reactors to melt and contaminating their cooling water. The water, 1.34 million tons, has been collected, filtered and stored in about 1,000 tanks, which fill much of the plant's grounds and will reach their capacity in early 2024.

The release of the treated wastewater has faced strong opposition from Japanese fishing organizations, which worry about further damage to the reputation of their seafood as they struggle to recover from the nuclear disaster. Groups in South Korea and China have also raised concerns, turning it into a political and diplomatic issue.

The government and TEPCO, say the water must be removed to make room for the plant’s decommissioning and to prevent accidental leaks from the tanks.

Junichi Matsumoto, TEPCO executive in charge of the water release, said in an interview with The Associated Press last month that the water release marks “a milestone,” but is still only an initial step in a daunting decommissioning process.

The government and TEPCO say the water will be treated and then diluted with seawater to levels safer than international standards.

TEPCO plans to release 7,800 tons of treated water in the 17-day first round of the release, Matsumoto said, adding that the idea is not to rush the release and minimize environmental impact. The company aims to release 31,200 tons of the treated water by the end of March 2024, which would empty only 10 tanks at the site. The pace will pick up later.

The seawater and marine life will be tested and the results will be disclosed on government and TEPCO websites.

The International Atomic Energy Agency in a final report in July concluded that the release, if conducted as designed, will cause negligible impact on the environment and human health. After taking into possible bioconcentration of low-dose radionuclides that remain in the water, the environmental and health impact is still negligible, TEPCO officials said.

On Tuesday, IAEA Director General Rafael Mariano Grossi said in a statement that the U.N. agency office opened at the plant in July will continue monitoring the water release so it remains consistent with the safety standards and publish real-time monitoring data and other information.

Scientists generally support the IAEA view, but some say long-term impact of the low-dose radioactivity that remains in the water needs attention.

Kishida’s government has stepped up outreach efforts to explain the plan to neighboring countries, especially South Korea, to keep the issue from interfering with their relationship.

TEPCO said it is working toward accepting application for damages caused by China's export restrictions on Japanese seafood.

___

Associated Press writers Hyung-jin Kim in Seoul, South Korea, and Kanis Leung in Hong Kong contributed to this report.