ISO 11320:2011提供了应急准备和响应标准，以尽量减少核临界事故造成的后果。操作的临界安全性根据ISO 1709进行评估。 ISO 11320:2011适用于具有一个或多个设施的场所，这些设施可能含有大量和浓度的裂变材料。ISO 11320:2011需要应用的程度取决于现场设施呈现的总体临界风险。 ISO 11320:2011不适用于含裂变材料包装的场外运输和中转储存。 ISO 11320:2011不适用于运行核电厂的现场或带有研究反应堆的设施，这些反应堆被许可成为临界或接近临界状态，前提是反应堆外部不存在可信临界事故风险的裂变材料操作。 ISO 11320:2011可在特定情况下适用于此类现场和设施，前提是现场管理部门和许可机构提供支持。

ISO 11320:2011 provides criteria for emergency preparedness and response to minimize consequences due to a nuclear criticality accident. The criticality safety of operations are evaluated in accordance with ISO 1709. ISO 11320:2011 applies to a site with one or more facilities which might contain significant quantities and concentrations of fissile material. The extent to which ISO 11320:2011 needs to be applied depends on the overall criticality risk presented by the facilities at the site. ISO 11320:2011 does not apply to off-site transport and transit storage of packages with fissile material. ISO 11320:2011 does not apply to sites with operating nuclear power plants or to facilities with research reactors which are licensed to become critical or near-critical, provided that there are no operations with fissile material external to the reactor for which a credible criticality accident risk exists. ISO 11320:2011 can be applied to such sites and facilities in specific cases, if supported by site management and by licensing authorities.