30 Mai 2015
May 30, 2015
May 30, 2015 - Updated 05:50 UTC+2
The operator of the damaged Fukushima Daiichi nuclear plant says it has found record-high levels of radioactive water in the facility's port. It says the high levels are due to a leak of wastewater.
Tokyo Electric Power Company officials said on Friday that contaminated water leaked from a crack in a hose connecting a wastewater tank to a building at the plant.
They later detected about 22,000 becquerels of beta ray-emitting substances per liter of water in a nearby drainage ditch. The ditch is in the upper part of a drainage channel.
The utility also found the density of radioactive materials in the channel was around 6,600 becquerels per liter. That's more than 200 times higher than the figure recorded on Wednesday.
TEPCO officials took samples of seawater from 4 locations in the port, where the leaked water reached via the drainage channel. They detected between 190 and 320 becquerels of radioactive substances per liter. The figure is the highest ever recorded in the port.
Utility officials say the leak stopped after they halted the flow of water, and that it has not affected waters in the Pacific Ocean outside the port.
TEPCO workers are trying to collect water from the drainage channel to prevent it from reaching the ocean.
May 29, 2015
May 29, 2015 - Updated 14:49 UTC+2
The operator of the crippled Fukushima Daiichi nuclear plant says workers have found a leak of comparatively highly radioactive water at the plant's site. It says the water flowed into the plant's port.
Tokyo Electric Power Company says the contaminated water was leaking from a hose connecting a wastewater tank and a building at the plant.
The hose had a crack about 1 centimeter long. The contaminated water was produced in a process to clean up rainwater tainted by radioactive materials at the plant.
Utility officials said the leaked water flowed into a nearby drainage channel and into the port.
They said they detected about 1,200 becquerels per liter of beta ray-emitting substances from water taken from the channel on Thursday. That figure was 40 times the level the previous day.
They said the figure rose to a maximum of 1,400 becquerels on Friday. The officials believe the leakage continued over the two days.
The company says concerns were raised about the hoses' durability. It has been replacing them.
Authorities in Fukushima Prefecture have urged the company to conduct an investigation to identify the cause of the leak. They say the company should take thorough measures to prevent a recurrence.