This Planet’s video explains the consequences of nuclear power that produces a nuclear waste storage problem for at least 3,000 future generations!
” FUKUSHIMA – Public prosecutors decided on Tuesday not to indict Tokyo Electric Power Co. President Naomi Hirose and other current and former executives of the utility over radioactive water leaks from the crippled Fukushima No. 1 nuclear power plant into the ocean.
Sufficient evidence was not found, the Fukushima District Public Prosecutor’s Office said.
In September 2013, a civic group filed a criminal complaint against 32 current and former Tepco executives, including Hirose and Tsunehisa Katsumata, former chairman of the operator of the northeastern nuclear power plant, saying tainted water leaked from storage tanks into the ocean due to their failure to take preventive measures.
Through its investigation, the Fukushima Prefectural Police concluded that some 300 tons of stored radioactive water had flowed into the sea as of July 2013 because Tepco executives neglected to monitor the tanks or take leak-prevention measures, and sent the case to the prosecutors last October.
The prosecutors said there was no evidence supporting the allegation that the leaked tainted water was carried into the sea by groundwater at the plant, which suffered meltdowns following the massive earthquake and tsunami in March 2011.
The group said it will ask for a prosecution inquest panel’s investigation. ”
” • The nearly mile-long structure consists of underground pipes designed to form a frozen barrier around the crippled reactors.
• The $312 million system was completed last month, more than a year behind schedule.
• Nearly 800,000 tons of radioactive water are already being stored onsite.
Japanese authorities have activated a large subterranean “ice wall” in a desperate attempt to stop radiation that’s been leaking from the Fukushima Daiichi nuclear power plant for five years.
The wall consists of a series of underground refrigeration pipes meant to form a frozen soil barrier around the four reactors that were crippled during the 2011 Tohoku earthquake and tsunami.
Construction of the $312 million government-funded structure was completed last month, more than a year behind schedule, the Associated Press reports. The nearly mile-long barrier is intended to block groundwater from entering the facility and becoming contaminated.
Tokyo Electric Power Co., or TEPCO, which owns the plant, activated the system Thursday, a day after obtaining approval from Japan’s Nuclear Regulation Authority.
In a video detailing the ice wall’s design, TEPCO said the technology has been successfully used to prevent water intrusion during the construction of tunnels, but this is the first time it has been used to block water from entering a nuclear facility.
“We will create an impermeable barrier,” the company said, “by freezing the soil itself all the way down to the bedrock that exists below the plant. When groundwater flowing downhill reaches this frozen barrier it will flow around the reactor buildings, reaching the sea just as it always has, but without contacting the contaminated water within the reactor buildings.”
TEPCO says the ice wall will be activated in stages over the next several months and is one of several measures the company is taking to reduce the amount of water being contaminated on the site.
Nearly 800,000 tons of radioactive water are already being stored in more than 1,000 industrial tanks at the nuclear plant, according to the AP.
While hopes are high that the ice wall will prove successful in stopping additional radioactive water from seeping into the Pacific Ocean, Shunichi Tanaka, chairman of the Nuclear Regulation Authority, urged caution.
“It would be best to think that natural phenomena don’t work the way you would expect,” he told reporters Wednesday, according to the AP report.
The activation of the ice wall comes just weeks after a TEPCO official reported that robots designed to access the dangerous interior of the plant and seek out the melted fuel rods were “dying” from the high levels of radiation. ”
by Chris D’Angelo
source with photos and several videos explaining how the ice wall works and showing Tepco workers initiating the frozen barrier
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Here is also a good video by NHK World that shows the spatial layout of the ice wall and how it works.