The Japanese government is poised to order TEPCO to implement a plan to install an underground frozen wall system around the reactors at Fukushima Daiichi.
A professor emeritus of Kyoto University suggested the idea and the government is urging TEPCO to adopt it. This seems to be a change in tactic where the government is ordering TEPCO to take a specific action. Contractor Kajima is likely to do the work with the wall taking up to 2 years to put in place. This plan could be installed in an easier manner than the underground concrete wall. It would also be able to stay frozen even through prolonged power outages. One advantage the wall system would have is that it wouldn’t be prone to cracking or voids as concrete would. This could be a benefit in the quake prone area where the plant grounds have experienced considerable movement.
Former Fukushima worker Happy has mentioned in the past his frustration with TEPCO’s insistence to cut corners to save money to the point it jeopardizes projects at the plant. TEPCO’s insistence to find a way to save a small amount of money has caused problems at the plant before. The pond system failed due to sub standard materials and construction and multiple workers died during the first year as TEPCO refused to provide sufficient safety equipment & facilities.
NHK has video explaining the concept
2012 Report on Kajima work at Fukushima Daiichi
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