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The Risk Analysis Screening Tool (RAST): Part Ⅱ, using RAST to evaluate the release of ammonia

机译：风险分析筛查工具（RAST）：第二部分，使用RAST评估氨的释放

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摘要

This is the second article on the Risk Analysis Screening Tool (RAST). Part Ⅰ provides an overview of the RAST software and how it can be used when performing a Hazards Identification and Risk Analysis. This article will focus on one piece of equipment: an ammonia storage tank located within a densely populated university campus. For the storage tank, the relief valve vents outdoors at the height of a two-story building with its release modeled as an outdoor release. The potential failure scenarios proposed by the RAST software confirmed the scenarios generated by the Process Hazards Analysis team. RAST can be used using minimum required inputs and general assumptions and default values within the software. The results are presented in this article along with an additional, similar case study on chlorine. The risk matrix and risk summary tabs give a visual presentation of whether the failure scenarios found by RAST are within an acceptable, tolerable risk. The user or company running the study may change the desired target frequency factor then work to achieve those figures through implementation of protective layers.
机译：这是风险分析筛选工具（RAST）的第二篇文章。第一部分概述了RAST软件的概述以及在执行危险识别和风险分析时如何使用它。本文将专注于一块设备：氨储罐位于一个密集的大学校园内。对于储罐，浮雕阀在户外通风口在两层楼的高度，其释放被设计为户外释放。 RAST软件提出的潜在故障情景确认了过程危险分析团队产生的情景。可以使用软件中的最小所需输入和常规假设以及默认值来使用RAST。结果在本文中介绍，以及含氯的另一种类似的案例研究。风险矩阵和风险摘要选项卡可视化呈现由RAST发现的故障情景是在可接受的，可容忍的风险之中。运行该研究的用户或公司可以通过实施保护层来改变所需的目标频率因子，以实现这些数字。

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