Development of a novel Petri net tool for process design selection based on inherent safety assessment method

2020 ◽

Vol 3 (1) ◽

Author(s):

Syaza I. Ahmad ◽

Mimi H. Hassim ◽

Haslenda Hashim ◽

Roslina Rashid

Keyword(s):

Process Design ◽

Safety Assessment ◽

Assessment Method ◽

Assessment Methods ◽

Design Stage ◽

Inherent Safety ◽

Boundary Case ◽

Safety Technique ◽

Positive Results ◽

Logistic Functions

The index-based inherent safety assessment method is preferable in comparing alternative chemical process routes due to its ability to be used in the early process design stage with limited details availability of the route assessed. However, the current index-based inherent safety assessment methods available have the shortcoming of subjective scaling. The Numerical Descriptive Inherent Safety Technique (NuDIST) is an inherent safety assessment method for the research and development design stage that overcomes the shortcoming of subjective scaling by incorporating logistic functions in its scoring assignment. The aim of this paper is to verify the NuDIST method in comparison with the Prototype Index for Inherent Safety (PIIS) and Inherent Safety Index (ISI) in terms of subjective scaling elimination. The inter-boundary case subjective scaling is considered solved if the scores difference between sub-edge boundaries is small while the intra-boundary case subjective scaling is considered solved if every value in a range has different scores. The results of the subjective scaling elimination test agree that NuDIST eliminates the shortcomings of subjective scaling with positive results for both inter-boundary and intra-boundary.

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Novel Methodology for Inherent Safety Assessment in the Process Design Stage

Industrial & Engineering Chemistry Research ◽

10.1021/ie303163y ◽

2013 ◽

Vol 52 (17) ◽

pp. 5921-5933 ◽

Cited By ~ 29

Author(s):

Preeti Gangadharan ◽

Ravinder Singh ◽

Fangqin Cheng ◽

Helen H. Lou

Keyword(s):

Process Design ◽

Safety Assessment ◽

Design Stage ◽

Inherent Safety

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Development of hazard prevention strategies for inherent safety assessment during early stage of process design

Process Safety and Environmental Protection ◽

10.1016/j.psep.2018.10.006 ◽

2019 ◽

Vol 121 ◽

pp. 271-280 ◽

Cited By ~ 9

Author(s):

Syaza I. Ahmad ◽

Haslenda Hashim ◽

Mimi H. Hassim ◽

Roslina Rashid

Keyword(s):

Process Design ◽

Safety Assessment ◽

Early Stage ◽

Inherent Safety ◽

Prevention Strategies

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A Novel Safety Assessment Method based on Fault Dependent Matrix

International Journal of Performability Engineering ◽

10.23940/ijpe.19.09.p12.23922399 ◽

2019 ◽

Vol 15 (9) ◽

pp. 2392 ◽

Cited By ~ 1

Author(s):

Dong Haiyong ◽

Gu Qingfan ◽

Wang Guoqing ◽

Zhai Zhengjun ◽

Lu Yanhong

Keyword(s):

Safety Assessment ◽

Assessment Method

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Deformation Inspection and Safety Assessment Method of Buried Flexible Pipeline in Service

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/1043/4/042043 ◽

2021 ◽

Vol 1043 (4) ◽

pp. 042043

Author(s):

Zhu Xinmin ◽

Feng Shaokong ◽

Huang Tao ◽

Shang Feng ◽

Yang Lufei

Keyword(s):

Safety Assessment ◽

Assessment Method

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An Online Quantified Safety Assessment Method for Train Service State Based on Safety Region Estimation and Hybrid Intelligence Technologies

International Journal of Software Engineering and Knowledge Engineering ◽

10.1142/s0218194015400185 ◽

2015 ◽

Vol 25 (03) ◽

pp. 493-511

Author(s):

Yong Qin ◽

Shan Yu ◽

Yuan Zhang ◽

Limin Jia ◽

Xiaoqing Cheng

Keyword(s):

Safety Assessment ◽

Safety Analysis ◽

Assessment Method ◽

Rolling Bearings ◽

Safety Risk ◽

Hybrid Intelligence ◽

Local Mean ◽

Interval Type ◽

Service State

Facing the important issues of safety analysis and assessment for the train service state, an online quantified safety assessment method based on the safety region estimation and hybrid intelligence technologies was proposed in this paper. First, the previous researches on the safety analysis and assessment were briefly reviewed for the train itself and its key equipment, and the existential problems were further pointed out. Then, using the safety monitoring data and the safety region estimation theory, a new online safety assessment method with data-driven was put forward, which was followed by a detailed description of the concrete implementation steps including the EMD (Local Mean Decomposition) and EM (Energy Moment) based safety risk evaluation index selection, Interval Type 2 Fuzzy C-Means (IT2FCM) clustering based safety region boundary calculation modeling and safety risk grading. Finally, in order to verify its performance through experiments, the above method was applied in analyzing and evaluating service states of the rolling bearings, the key equipment of the train, on the basis of mass field data. The experimental results indicate that this method is valid.

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Mathematical Approaches in Functional Safety Assessment for E/E/PE Safety-Related Software

International Journal of Reliability Quality and Safety Engineering ◽

10.1142/s0218539321500431 ◽

2021 ◽

pp. 2150043

Author(s):

Shinji Inoue ◽

Takaji Fujiwara ◽

Shigeru Yamada

Keyword(s):

Software Reliability ◽

Safety Assessment ◽

Assessment Method ◽

Functional Safety ◽

Reliability Modeling ◽

Software Failure ◽

Safety Integrity Level ◽

Iec 61508 ◽

Systematic Failure ◽

Quantitative Safety Assessment

Safety integrity level (SIL)-based functional safety assessment is widely required in designing safety functions and checking their validity of electrical/electronic/programmable electronic (E/E/PE) safety-related systems after being issued IEC 61508 in 2010. For the hardware of E/E/PE safety-related systems, quantitative functional safety assessment based on target failure measures is needed for deciding or allocating the level of SIL. On the other hand, IEC 61508 does not provide any quantitative safety assessment method for allocating SIL for the software of E/E/PE safety-related systems because the software failure is treated as a systematic failure in IEC 61508. We discuss the needfulness of quantitative safety assessment for software of E/E/PE safety-related systems and propose mathematical fundamentals for conducting quantitative SIL-based safety assessment for the software of E/E/PE safety-related systems by applying the notion of software reliability modeling and assessment technologies. We show numerical examples for explaining how to use our approaches.

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