Risk assessment of membrane type LNG storage tanks in Korea-based on fault tree analysis
Risk assessment of membrane type LNG storage tanks in Korea-based on fault tree analysis
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DOI：
10.1007/bf02701454
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发表时间：
2005-01-01
影响因子：
2.7
通讯作者：
Theofanous, TG
中科院分区：
文献类型：
--
作者：
Kim, H;Koh, JS;Theofanous, TG
对于液化天然气（LNG）储罐，最大的问题是由于主罐及其附属设备的机械故障或各种硬件部件的故障而导致大量LNG或其蒸气的释放。目前，LNG工业中主要采用两种LNG储罐设计方案，即9%镍全封闭和膜式储罐。在韩国，膜式液化天然气从液化天然气项目的一开始就被全国采用，因为与9%镍型相比，膜式液化天然气在储存容量方面具有更高的灵活性。虽然已经建造和运行了几个巨大的膜式储罐，但尚未系统地描述与之相关的风险的量化结果。因此，本文采用事故树分析法作为定量风险评价方法，对膜式LNG储罐进行了风险识别和评价。将导致天然气大量释放的6个主要事件定义为内部诱发的重大事故，并利用其他来源的工艺设备可靠性数据计算了这些事件的失效频率。
For a liquefied natural gas (LNG) storage tank, the greatest concern is for the release of a large amount of LNG or its vapor due to the mechanical failures of main tank and its ancillary equipments or the malfunctions of various hardware components. Nowadays two types of LNG storage tank design, that is, 9%-Ni full containment and membrane concepts, are mostly applied to LNG industry. In Korea the membrane type has been nationally adopted from the beginning step of LNG project because of its higher flexibility in storage capacity comparing to the 9%-Ni type. All the while several huge membrane-type tanks have been built up and operating, the quantified results of risk associated with them has not been systematically delineated. Hence the method of fault tree analysis as a quantitative risk assessment has been here employed to identify and evaluate the risks related to the membrane-type LNG storage tank. Six top events leading greatly to the large release of natural gas are defined as internally induced major accidents and the failure frequencies of these events are calculated by using other sources of process equipment reliability data for the lack of membrane type-specific data.