UN nuclear chief to give final report on release of Fukushima radioactive water

An employee of Tokyo Electric Power Company at the Fukushima Daiichi nuclear power plant in Fukushima, northern Japan, on June 26. Photo / AP

The head of the UN nuclear agency is in Japan to meet government leaders today and to see final preparations for the release of treated radioactive wastewater into the sea from the damaged Fukushima nuclear plant, on a visit Japan hopes will give credibility to the contentious plan.

International Atomic Energy Agency head Rafael Mariano Grossi will meet Prime Minister Fumio Kishida to submit IAEA’s final report on the water release. All of IAEA’s interim evaluations have been positive and the final report is expected to say that the water sampling, testing and monitoring plans involved in the release are adequate and fulfil international requirements.

Grossi, at a joint news conference after meeting Foreign Minister Yoshimasa Hayashi, said the report sums up the IAEA’s work over the past two years and handing it to Kishida marks “an important chapter”.

Hayashi thanked “IAEA’s impartial and professional efforts on their review from safety and regulatory aspects”. He promised Japan’s further effort to provide detailed explanations to the international community “based on scientific evidence and with a high degree of transparency”.

The treated radioactive water, stored in about 1000 tanks that are nearing their 1.37 million tonne capacity, must be removed to prevent accidental leaks and to make room for the plant’s decommissioning.

Japanese regulators finished their final safety inspection of the equipment last Friday and the plant operator, Tokyo Electric Power Company Holdings, is expected to receive a permit for discharging the water in about a week. The start date is undecided amid concerns and protests.

South Korea, China and some Pacific Island nations oppose the water release because of safety concerns and political reasons. Local fishing groups are worried their reputation will be damaged even if their catch is uncontaminated, and water and beach businesses and tourism operators are concerned.

Japan has sought support from the IAEA to gain credibility for the plan and assurances that its safety measures meet international standards. The IAEA has made several trips to Japan since early 2022 but acknowledges it can’t make decisions for the Japanese government, including stopping the wastewater release.

Grossi will also meet heads of Japanese ministries and the nuclear agency relevant to the water release. He will visit the Fukushima plant to see some of the newly constructed facilities for the water release during his four-day visit.

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To ease concerns overseas, Grossi is expected to visit South Korea, New Zealand and the Cook Islands after his visit to Japan.

Japan’s government and TEPCO say the treated but still slightly radioactive water will be diluted to levels safer than international standards and will be released gradually into the ocean over decades, making it harmless to people and marine life.

Some scientists say the impact of long-term, low-dose exposure to radionuclides is unknown. Others say the release plan is safe but call for more transparency in sampling and monitoring of the release.

The government says questionable documents have been circulated, including one alleging that Japan pressured the IAEA to remove negative information from its final report. Hayashi and other officials have denied them.