New device tests for radioactivity at sea
Print Edition
CHINESE scientists have begun using a ship-borne device that provides immediate analysis of radioactivity in water, using it to check for pollution from Japan’s Fukushima nuclear accident in the Yellow Sea.
Previously, they faced the time-consuming task of transferring water into containers and bringing it to labs to check the concentration of cesium, a radionuclide. Cesium has a very low absorption rate into water, so large quantities of water must be analyzed.
The team with the State Oceanic Administration that developed the device installed it on a police patrol ship for a 10-day voyage to the Yellow Sea earlier this month. It took just one person to run the tests.
The development team’s Shi Hongqi said the device can filter seven liters of water a minute. It analyzed 22 samples of 800 liters in the Yellow Sea, finding no signs of dangerous radioactivity.
No specific data from the tests was disclosed, but Shi said they will be included in the administration’s end of year reports.
He said more of the devices will be installed on police patrol ships to check other waters potentially affected by Fukushima.
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