KYIV, Ukraine (AP) — Ukraine is considering restarting Europe’s largest nuclear plant, which is occupied by Russian troops, to ensure its safety just weeks after fears of a radiation disaster prompted its shutdown, the facility operator’s head said Tuesday. The Zaporizhzhia nuclear power plant has emerged as one of the most worrying flashpoints in Russia’s occupation of Ukraine. It has been damaged in fighting, prompting international alarm, and its head was detained by occupying forces through the weekend before his release Monday.