The UN atomic agency said on Friday that Japan’s Onagawa nuclear power plant, despite having been closest to the epicenter of the earthquake and tsunami that struck the country last year, was in surprisingly good shape.
The structural elements of the plant were “remarkably undamaged given the magnitude of ground motion experienced and the duration and size of this great earthquake,” the International Atomic Energy Agency (IAEA) said in an initial report.
The Onagawa plant recorded temblors — “among the strongest of any plant affected by the earthquake” — that exceeded its design capacity and the basement of one of its reactor buildings flooded, but the plant maintained its cooling capacity, its reactors shut down without damage to their cores and there were no signs of major damage to crucial safety systems, the Vienna-based IAEA said.
The Fukushima Dai-ichi plant, 120km to the south, was not so lucky, suffering multiple reactor meltdowns and releasing radioactivity into the environment in the world’s worst nuclear accident in 25 years.
The IAEA report followed a two-week trip by 19 international experts that will be followed by further visits at Onagawa and reviews of other Japanese nuclear plants.
Findings will be added to an IAEA database being compiled by its International Seismic Safety Center (ISSC) that was part of the watchdog’s “action plan” on nuclear safety drawn up in the wake of the Fukushima disaster.
“The data we are collecting will make an important contribution to improving safety,” mission head Sujit Samaddar said. “Information in the database will allow IAEA member states to measure the performance of their nuclear power plants in the face of external hazards.”
In contrast, the magnitude 9.0 earthquake on March 11 last year knocked out a power line at the Fukushima Dai-ichi plant and generated a large tsunami that flooded its emergency generators, destroying the plant’s cooling systems. Catastrophic meltdowns occurred in three reactors, releasing radiation that has tainted the surrounding environment.
The plant has since stabilized, but more than 100,000 people still can’t go home due to radiation fears, while work to decommission the plant will take about 40 years. It was the world’s worst atomic accident since Chernobyl.
The Onagawa plant was about 70km from the quake’s epicenter, while Fukushima Dai-ichi was nearly 180km from the epicenter.
The tsunami was more than 13m high at both nuclear plants. Fukushima Dai-ichi’s seawall was built to withstand a tsunami of up 5.7m. Onagawa’s seawall was nearly 14m high and survived the tsunami. It has since been extended to nearly 17m above sea level.
Investigations by the government, the parliament and private groups have found that Tokyo Electric Power Co (TEPCO) underestimated the earthquake and tsunami risks faced by its plant at Fukushima despite a history of quakes in the region. The investigations have also criticized TEPCO and government regulators, which have developed cozy relationships, for ignoring safety standards and recommendations, including those by IAEA and other groups.
The IAEA visit from July 30 to Wednesday this week was its first to the Onagawa plant since the disaster. The group inspected the plant and interviewed dozens of workers and officials to assess how its structure, systems and components responded to the quake and its violent shakings.
Samaddar said he hoped to make similar inspections at other plants in Japan to share information and improve safety at nuclear power across the world. No visits are scheduled yet and would only take place at Japan’s invitation.
Five nuclear plants total suffered some level of damage from the earthquake and tsunami, but all but Fukushima Dai-ichi were shut down safely.
In May, the last of Japan’s 50 working reactors were turned off as safety checks were carried out, but two are now back online and generating power. Despite public protests, the government is eager to restart reactors because of the ballooning cost of fuel imports to keep the power supply running.
ANGER: A video shared online showed residents in a neighborhood confronting the national security minister, attempting to drag her toward floodwaters Argentina’s port city of Bahia Blanca has been “destroyed” after being pummeled by a year’s worth of rain in a matter of hours, killing 13 and driving hundreds from their homes, authorities said on Saturday. Two young girls — reportedly aged four and one — were missing after possibly being swept away by floodwaters in the wake of Friday’s storm. The deluge left hospital rooms underwater, turned neighborhoods into islands and cut electricity to swaths of the city. Argentine Minister of National Security Patricia Bullrich said Bahia Blanca was “destroyed.” The death toll rose to 13 on Saturday, up from 10 on Friday, authorities
RARE EVENT: While some cultures have a negative view of eclipses, others see them as a chance to show how people can work together, a scientist said Stargazers across a swathe of the world marveled at a dramatic red “Blood Moon” during a rare total lunar eclipse in the early hours of yesterday morning. The celestial spectacle was visible in the Americas and Pacific and Atlantic oceans, as well as in the westernmost parts of Europe and Africa. The phenomenon happens when the sun, Earth and moon line up, causing our planet to cast a giant shadow across its satellite. But as the Earth’s shadow crept across the moon, it did not entirely blot out its white glow — instead the moon glowed a reddish color. This is because the
DEBT BREAK: Friedrich Merz has vowed to do ‘whatever it takes’ to free up more money for defense and infrastructure at a time of growing geopolitical uncertainty Germany’s likely next leader Friedrich Merz was set yesterday to defend his unprecedented plans to massively ramp up defense and infrastructure spending in the Bundestag as lawmakers begin debating the proposals. Merz unveiled the plans last week, vowing his center-right Christian Democratic Union (CDU)/Christian Social Union (CSU) bloc and the center-left Social Democratic Party (SPD) — in talks to form a coalition after last month’s elections — would quickly push them through before the end of the current legislature. Fraying Europe-US ties under US President Donald Trump have fueled calls for Germany, long dependent on the US security umbrella, to quickly
Local officials from Russia’s ruling party have caused controversy by presenting mothers of soldiers killed in Ukraine with gifts of meat grinders, an appliance widely used to describe Russia’s brutal tactics on the front line. The United Russia party in the northern Murmansk region posted photographs on social media showing officials smiling as they visited bereaved mothers with gifts of flowers and boxed meat grinders for International Women’s Day on Saturday, which is widely celebrated in Russia. The post included a message thanking the “dear moms” for their “strength of spirit and the love you put into bringing up your sons.” It