(Sacbee) - If your favorite California red wine was made anytime after 2011, it may contain trace amounts of radioactive particles — from a nuclear disaster in Japan.

In a recent study, French nuclear physicists reported that they tested 18 bottles of rosé and cabernet sauvignon from the years 2009 to 2012 and found radioactive traces from the disaster, according to the study and The New York Times.

The researchers hoped to see whether they could find more particles of cesium-137, a radioactive isotope, in the wines made after the Fukushima Dai-ichi Nuclear Power Plant in Japan melted down in 2011. Researchers were interested to see if results paralleled what happened in Europe after the Chernobyl nuclear power plant melted down in 1986 — when researchers found elevated levels of cesium-137 in French wines.