OS1-6 Rationalized Alarm Logic Design based on Process Hazard Analysis

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  • SHAZAWA Yu
    Department of Chemical Engineering Tokyo Institute of Technology
  • SHIMADA Yukiyasu
    Chemical Safety Research Gr., National Institute of Occupational Safety and Health
  • FUCHINO Tetsuo
    Department of Chemical Engineering Tokyo Institute of Technology

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Other Title
  • OS1-6 PHAに基づくアラームロジック設計手法の開発(OS1 安全のための新技術)

Description

In this paper, we focus on a design of the alarm system as a first step to develop a design methodology of IPL (Independent Protection Layers) [1] based on PHA (Process Hazard Analysis). We present a design method based on HAZOP (Hazard and Operability Study) to develop two kinds of alarm systems separately, i.e. one is for cause identification, and the other is for consequence mitigation. The effectiveness of this study is illustrated through a case study for Hydro Desulfuration (HDS) process.

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