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BEIJING, June 18 -- A Chinese marine inspection has detected Cesium 134, a marker nuclide of Fukushima, the State Oceanic Administration (SOA) announced on Wednesday.

The SOA is building a Western Pacific marine environment inspection and early-warning system and during an expedition over 5,500 nautical miles in 27 days, 53 observation stations have been installed, five with a monitoring depth over 1,000 meters.

Cesium 134, a characteristic nuclide leaked from the 2011 meltdown of the Fukushima Daiichi nuclear complex following a tsunami, was detected in several such observation stations, the SOA said.

He Jianhua, chief scientist of the expedition, said the increased depth of monitoring will help monitor radioactive pollutants in Chinese seas.