Only 26-meter tsunami could now damage Fukushima – TEPCO

Only 26-meter tsunami could now damage Fukushima – TEPCO
The operator of Japan's crippled Fukushima nuclear plant has raised the tsunami projectile height, saying it would take a 26-meter wave to damage the facility and cause radioactive leakage, local media reported. This comes as Japan faces a typhoon threat.

Officials from the Tokyo Electric Power Company (TEPCO) have nearly doubled the previous projected tsunami height that would inundate the Fukushima Daiichi nuclear plant – raising it from 14 to 26.3 meters, Asahi Shimbun reported on Saturday.

The flood caused by such a tsunami would “likely cause seawater to mingle with the radiation-tainted water accumulating in the basements of the reactor buildings at the six-unit plant, allowing 100 trillion becquerels of cesium to escape,” The Japan Times reported, citing TEPCO officials.

However, TEPCO officials noted that such a strong tsunami occurs only once every 10,000 to 100,000 years.

The operator also increased the scale of a potential earthquake that would damage the plant by 1.5 times to 900 gals, media reported.

The company’s statement made on Friday comes in response to a demand made by Japan’s Nuclear Regulation Authority (NRA) for the operator to review tsunami counter-measures. The authority is to decide whether TEPCO’s figures are suitable.

Following the March 2011 earthquake that triggered a 15.5 meter tsunami and hit the Fukushima Daiichi plant – causing three nuclear core meltdowns – the NRA obliged other facilities to strengthen tsunami counter-measures and raise the scale of the highest tsunami protection. But the new regulation did not apply to Fukushima, which is over 40 years old, as the plant was to be decommissioned.

As a measure to reduce the impact of a potential hit by a huge seismic wave, TEPCO said it will cut the quantity of radioactive water stored on the premises of the facility. Thus, the amount of radioactive water leaked into the ocean would be reduced by 30 percent, Asahi reported.

In the wake of the 2011 tragedy, Japan shut down all its nuclear reactors. However, the Japanese government has been keen on the nuclear restart, insisting that the reactors are necessary to provide cheaper energy to the economically-challenged Asian nation.

Anti-nuclear protesters wearing protective suits push mock drums which are labelled as radioactive waste from Kansai Electric Power Co's Ohi nuclear power plant (L) and Tokyo Electric Power Co's (TEPCO) Fukushima nuclear power plant, as they march in Tokyo March 9, 2014.(Reuters / Yuya Shino )


On September 10, the NRA cleared the Sendai facility in Kagoshima prefecture to be restarted, causing a stir across the globe. Critics of the decision have pointed to the threat posed by a volcano located nearby. Its eruption in September killed over 30 people and injured dozens.

READ MORE: Eruption or not, nuclear restart in Japan to go ahead on schedule

Will Typhoon Phanfone affect Fukushima?

At the same time, Japan is preparing for a powerful and dangerous typhoon heading for its shores. Forecasts made by Japanese meteorologists indicate that Typhoon Phanfone will hit the main islands of the country late on Sunday.

As the eye of the storm passed the southern Japanese islands of Okinawa, three men were washed away by the storm. One US airman was confirmed dead while two more are still missing, having disappeared into the sea from Kandena Air Base on Sunday.

“Phanfone will be steadily weakening as it approaches Japan, and should be no stronger than a Category 1 storm at its point of closest approach,” meteorologist Jeff Masters wrote on the blog 'Weather Underground.'

The typhoon has sparked lively debate on Twitter, in terms of how it will affect the crippled Fukushima nuclear plant.


A previous typhoon which swept through Japan last October led to highly radioactive water near the nuclear plant being released into a nearby drainage ditch, increasing the risk of it flowing into the sea.

READ MORE: Toxic flush: Typhoon causes radioactive leaks at Fukushima