A trouble-prone system used to decontaminate radioactive water at Japan’s crippled Fukushima Dai-ichi nuclear power plant was switched off yesterday because of a chemical leak, the plant’s operator said.
Hydrochloric acid, used to neutralize alkaline water being decontaminated, was found seeping from a pipe joint, Tokyo Electric Power Co (TEPCO) said in a statement.
The pipe joint was wrapped in a vinyl bag to contain the leakage, TEPCO said, adding that it was investigating the cause of the trouble.
Photo: Reuters
About 1 liter of hydrochloric acid has been contained in the bag.
The leak was found at one of three Advanced Liquid Processing System units designed to remove radioactivity from contaminated water at the plant, where a massive earthquake and tsunami in March 2011 sent nuclear reactors into meltdown.
The systems are expected to play a crucial role in treating huge amounts of toxic water accumulating at the plant.
The troubled system was one of two units that had been on trial and were scheduled to go into full operation yesterday.
In late September, plastic padding clogged up a drain in the same system, causing it to shut down.
In October, it was halted due to a programming mistake.
Thousands of tonnes of water, used since the meltdown to cool reactors, or polluted by other radioactive material, are being stored in huge tanks at the site on Japan’s northeast coast.
A series of setbacks, including radioactive water leaks into the Pacific Ocean, have eroded confidence that Asia’s largest utility can tame the world’s worst atomic disaster since Chernobyl.
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