The French French Nuclear Safety Authority said a security cordon was set up around the Marcoule plant as a precaution.
法国核安全管理局表示，目前已经在马尔·库尔核电站周围建立了安全警戒线作为预防措施。
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Four other people were injured, one seriously, in the blast at the Centraco site, owned by French power utility EDF and adjacent to the Marcoule nuclear research center.