In this paper, a novel methodology for batch plant safety analysis is proposed using process dynamic modelling. Batch processes are divided into several safety objects that are linked to operation level. Safety objects are evaluated by dynamic simulation and fault propagation models are generated. By using this model, an improved fault tree analysis (FTA) method using house event-time (HET) is ...

Since its founding, NASA has been dedicated to the advancement of aeronautics and space science. The NASA Scientific and Technical Information (STI) Program Office plays a key part in helping NASA maintain this important role. The NASA STI Program Office is operated by Langley Research Center, the lead center for NASA's scientific and technical information. The NASA STI Program Office provides ...

This study focused on the public transport risk assessment in District one of ​​Tehran through Fault Tree Analysis involving the three criteria of human, vehicle and road in Haddon matrix. In fact, it examined the factors contributing to the occurrence of road accidents at several urban black spots within District 1. Relying on road safety checklists and survey of experts, this study made an ef...

The increase in complexity of modern mechanical systems can often lead to systems that are difficult to diagnose, and therefore require a great deal of time and money to return to a normal operating condition. Analyzing mechanical systems during the product development stages can lead to systems optimized in the area of diagnosability, and therefore to a reduction of life cycle costs for both c...

One of the important tasks of the Reliability Estimation is Analysis of the Fault Tree. A problem of Fault Trees analysis is considered one of the most complex ones, since structure of such trees is characterized by a considerable number of interconnections. Usually analytical methods are used and most applicable method is Minimal Cut Sets building and calculation. Classical Fault Tree Analysis...

Maintenance of the main engine lubrication system determines engine’s performance and components based on standard Japan Institute Plant Maintenance. The purpose analysis is to determine critical evaluate every component as a base maintenance planning preventive measure avoid downtime during ship operations. Data needed are ship’s motion, damage frequency, components’ downtime, diagram. was ana...

Safety critical systems are systems whose operational deviations can potentially lead to catastrophic consequences or loss of human lives. These systems are widely employed in various industries, including the automotive, aerospace, weapons and nuclear industries. Today‟s modern safety-critical systems often incorporate numerous embedded control components, involve various engineering disciplin...

Digital instrumentation and control (I&C) upgrades are a vital research area for nuclear industry. Despite their performance benefits, deployment of digital I&C in power plants (NPPs) has been limited. systems exhibit complex failure modes including common cause failures (CCFs) which can be difficult to identify. This paper describes the development redundancy-guided application Systems-Theoret...

Probabilistic safety assessment (PSA) which plays a crucial role in risk evaluation is a quantitative approach intended to demonstrate how a nuclear reactor meets the safety margins as part of the licensing process. Despite PSA merits, some shortcomings associated with the final results exist. Conventional PSA uses crisp values to represent the failure probabilities of basic events. This causes...