重大危险源是指长期地或者临时地生产、搬运、使用或者储存危险物品,且危险物品的数量等于或者超过危险临界量的单元(包括场所和设施)。为了预防重大、特大事故的发生,降低事故造成的损失,必须建立有效的重大危险源控制系统,加强对重大危险源的监督管理,对重大危险源实施有效的 Major hazard refers to the unit (including the place and facility) that produces, transports, uses or stores the dangerous goods for a long time or on an ad hoc basis and the quantity of dangerous goods equals or exceeds the dangerous critical quantity. In order to prevent the occurrence of major and extraordinary accidents and reduce the losses caused by accidents, it is necessary to establish an effective control system for major dangerous sources, strengthen the supervision and administration of major dangerous sources, and implement effective control over major dangerous sources