Busan Labor Office, Police Raid SK Energy Over Fatal Accident 조선일보Hydrogen Blast at SK Energy’s Ulsan Refinery Prompts Major Safety Overhaul ChemAnalystSK Energy, which recently caused a total of six casualties, including the death of two workers in a 매일경제Senior executives could be jailed after second worker dies from hydrogen fire at South Korea’s largest refinery Hydrogen InsightFatal Hydrogen Pipeline Explosion Raises Safety Concerns Fuel Cells Works