3 October 2013 Last updated at 12:27 ET
Workers have struggled to deal with the huge volumes of contaminated water at the damaged plant
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Japan’s crippled Fukushima nuclear plant has a new leak of radioactive water after workers overfilled a storage tank, its operator says.
The workers miscalculated the tank’s capacity as it was tilted on unlevel ground, plant operator Tepco said.
It said around 430 litres (100 gallons) of water may have leaked from the tank, and could have flowed into the sea.
The plant has experienced several leaks since being crippled by an earthquake and tsunami in 2011.
One of the largest leaks took place in August, when Tepco discovered a leak of at least 300 tonnes of highly radioactive water at a different part of the plant.
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The latest leak was discovered by workers late on Wednesday.