Title: Radioactive fallout detected far from Fukushima
Source: Asahi Shimbun
Author: NOBUTARO KAJI
Date: September 11, 2012
A significant quantity of radioactive cesium, likely from the crippled Fukushima No. 1 nuclear power plant, has turned up in subsea mud about 200 kilometers away, near the mouth of the Shinanogawa River on Japan’s northwestern coast.
Scientists said samples taken in 2011 at Nagaoka, Niigata Prefecture, contained concentrations of up to 460 becquerels per kilogram of dry mud
The highest concentration was 2-3 cm below the mud surface at a water depth of 30 m. That reading of 460 becquerels per kg compares to samples of over 400 becquerels around the mouth of the Arakawa river in Tokyo Bay in August 2011.
Both readings are dozens of times higher than contamination detected after past atmospheric nuclear tests.
At a depth of 20 m the maximum concentration was 318 becquerels per kg, while at 15 m it was 255 becquerels.
Published: September 11th, 2012 at 3:48 am ET