Title: Cesium found in plankton 600 km away
Source: The Yomiuri Shimbun
Date: Mar. 18, 2012
Radioactive cesium believed to have been released during the crisis at the Fukushima No. 1 nuclear power plant has been found in plankton about 600 kilometers east of the facility, according to a Japan-U.S. joint research team. [...]
The findings will be reported to a conference of the Oceanographic Society of Japan set for Tuesday.
The research team collected animal plankton at 17 locations between 30 kilometers and 600 kilometers east of the plant in June last year, about three months after the March 11 earthquake [...]
- Cesium-137 was detected in all of the collected plankton
- dry state was found to contain 0.3 to 56.4 becquerels per kilogram
- before the crisis showed that plankton contained between 0.1 and 0.4 becquerels of cesium-137 per kilogram
- In the latest survey, the team also found cesium-134–which has a two-year half-life–in plankton at the same levels as cesium-137
Bio-accumulation in the Food Chain
Follow-up studies will be necessary because the radioactive cesium is likely to have accumulated in fish that eat plankton, the team said.
Read the report here
Published: March 18th, 2012 at 7:35 am ET