The levels of contamination in bottles of rosé were lower than in red wines, which also happened in French wines tested after Chernobyl, according to the study.
The latest study is glowing, but in a bad way.
For the study, researchers examined a series of vintage Napa Valley Cabernet Sauvignon wines from 2009 to 2012 to see if they could detect an increase in radioactive particles around the time the Fukushima Accident occurred.
Researchers tested various wines from Napa Valley bottled between 2009 and 2012, and they discovered that after 2011, the wines showed nearly double the level of radioactive particles as compared to past years.
Fukushima's nuclear signature found in California wine -The Japanese nuclear disaster bathed north America in a radioactive cloud. In the case of the cabernet, the levels of the radioactive materials doubled. To determine the actual age of a bottle, scientists scan the wine for traces of cesium-137, which only shows up in wines produced after the world's first nuclear tests and explosions.
According to a recently released study, wines made after the March 11, 2011 disaster contained small traces of cesium-137, a radioactive isotope.
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The isotope, which has been found in very small concentrations in the air ever since nuclear tests began in the 20th century, can raise the risk for cancer if ingested in large amounts - far larger than the levels found in these wine tests.
MIT Technology Review explains that French pharmacologist Philippe Hubert developed the fraud detection tool in 2001.
Still, it took more than a gamma detector to uncover the California bottles' secrets. This resulted in reducing the wine to ash.
The California Department of Public Health said in a statement to The New York Times on Friday that "there were no health and safety concerns to California residents".
"It is more for the pure scientific aspect that we were interested in measuring them", he told the newspaper.