All Outputs (11)

A Petri net model-based resilience analysis of nuclear power plants under the threat of natural hazards (2022)
Journal Article
Yan, R., Dunnett, S., & Andrews, J. (2023). A Petri net model-based resilience analysis of nuclear power plants under the threat of natural hazards. Reliability Engineering and System Safety, 230, Article 108979. https://doi.org/10.1016/j.ress.2022.108979

Due to global climate change, nuclear power plants are increasingly exposed to the threats of extreme natural disasters. In this paper, a resilience engineering approach is applied to tackle all aspects of nuclear safety, spanning from design, operat... Read More about A Petri net model-based resilience analysis of nuclear power plants under the threat of natural hazards.

Dynamic and dependent tree theory (D2T2): A framework for the analysis of fault trees with dependent basic events (2022)
Journal Article
Andrews, J., & Tolo, S. (2023). Dynamic and dependent tree theory (D2T2): A framework for the analysis of fault trees with dependent basic events. Reliability Engineering and System Safety, 230, Article 108959. https://doi.org/10.1016/j.ress.2022.108959

Fault tree analysis remains the most commonly employed method, particularly in the safety critical industries, to predict the probability or frequency of system failures. Whilst it has its origins back in the 1960s, the assumptions employed in the ma... Read More about Dynamic and dependent tree theory (D2T2): A framework for the analysis of fault trees with dependent basic events.

Optimisation of nuclear reactor primary coolant design and maintenance parameters (2022)
Journal Article
Wootton, M. J., Zhou, Y., Andrews, J. D., Smith, R., Arul, A. J., Vinod, G., …Garg, V. (2022). Optimisation of nuclear reactor primary coolant design and maintenance parameters. Applied Stochastic Models in Business and Industry, https://doi.org/10.1002/asmb.2722

An optimisation methodology is presented using the primary coolant circulation system of a nuclear reactor as its case study, the purpose of which is to find combinations of selected design and maintenance parameters to maximise the reactor safety an... Read More about Optimisation of nuclear reactor primary coolant design and maintenance parameters.

An integrated modelling framework for complex systems safety analysis (2022)
Journal Article
Tolo, S., & Andrews, J. (2022). An integrated modelling framework for complex systems safety analysis. Quality and Reliability Engineering International, 38(8), 4330-4350. https://doi.org/10.1002/qre.3212

The ever-increasing complexity of engineering systems has fuelled the need for novel and efficient computational tools able to enhance the accuracy of current modelling strategies for industrial systems. Indeed, traditional Fault and Event Tree techn... Read More about An integrated modelling framework for complex systems safety analysis.

Dynamic and Dependent Tree Theory (D 2 T 2 ): A Fault Tree Analysis Framework (2022)
Conference Proceeding
Andrews, J., & Tolo, S. (2022). Dynamic and Dependent Tree Theory (D 2 T 2 ): A Fault Tree Analysis Framework. In M. Chiara Leva, E. Patelli, L. Podofillini, & S. Wilson (Eds.), Book of Extended Abstracts for the 32nd European Safety and Reliability Conference (139-140)

A modelling framework, known as Dynamic and Dependent Tree Theory, is provided which overcomes restrictions in the Kinetic Tree Theory developed in the 1970s for the analysis of fault trees. Kinetic Tree Theory assumes basic events to be independent... Read More about Dynamic and Dependent Tree Theory (D 2 T 2 ): A Fault Tree Analysis Framework.

An Integrated Modelling Framework for Complex Systems Safety Analysis: Case-Studies (2022)
Conference Proceeding
Tolo, S., & Andrews, J. (2022). An Integrated Modelling Framework for Complex Systems Safety Analysis: Case-Studies. In M. C. Leva, E. Patelli, L. Podofillini, & S. Wilson (Eds.), Book of Extended Abstracts for the 32nd European Safety and Reliability Conference (135-136)

The ever-increasing complexity of engineering systems has fuelled the need for novel and efficient computational tools able to enhance the accuracy of current modelling strategies for industrial systems. Indeed, traditional Fault and Event Tree techn... Read More about An Integrated Modelling Framework for Complex Systems Safety Analysis: Case-Studies.

A Petri Net approach to the Risk Analysis of Jet Engines (2022)
Conference Proceeding
Tolo, S., Andrews, J., Thatcher, I., & Stamp, D. (2022). A Petri Net approach to the Risk Analysis of Jet Engines. In M. Chiara Leva, E. Patelli, L. Podofillini, & S. Wilson (Eds.), Book of Extended Abstracts for the 32nd European Safety and Reliability Conference (137-138)

Traditional risk analysis techniques such as Fault Trees and Event Trees fail to model complex aspects of systems behaviour such as components dependencies, degradation, limiting their capability of representing modern engineering systems. This is al... Read More about A Petri Net approach to the Risk Analysis of Jet Engines.

Fault Tree analysis including component dependencies (2022)
Conference Proceeding
Tolo, S., & Andrews, J. (2022). Fault Tree analysis including component dependencies. In M. C. Leva, E. Patelli, L. Podofillini, & S. Wilson (Eds.), Book of Extended Abstracts for the 32nd European Safety and Reliability Conference (133-134). https://doi.org/10.1109/TR.2023.3264943

The inability of commonly used risk assessment methodologies to model component dependency is often recognised to be a barrier towards more realistic modelling of systems complexity. This is a significant limitation associated with widely adopted tec... Read More about Fault Tree analysis including component dependencies.

A Petri net asset management framework for railway switches and crossings (2022)
Journal Article
Litherland, J., & Andrews, J. (2022). A Petri net asset management framework for railway switches and crossings. Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit, https://doi.org/10.1177/09544097221110970

Switches and Crossings (S&C) are a fundamental part of any railway network, they allow trains to switch between tracks and to cross over other tracks. They consist of various electrical and mechanical components to which there is a substantial mainte... Read More about A Petri net asset management framework for railway switches and crossings.

A reliability study of railway switch and crossing components (2022)
Journal Article
Litherland, J., & Andrews, J. (2022). A reliability study of railway switch and crossing components. Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit, https://doi.org/10.1177/09544097221100672

Within any railway network Switches and Crossings (S&C) are essential. They allow trains to change tracks, allowing different routes to be selected. Despite their necessity, they generally have a lower reliability than plain line track and are often... Read More about A reliability study of railway switch and crossing components.

Reduction of Petri net maintenance modeling complexity via Approximate Bayesian Computation (2022)
Journal Article
Chiachío, M., Saleh, A., Naybour, S., Chiachío, J., & Andrews, J. (2022). Reduction of Petri net maintenance modeling complexity via Approximate Bayesian Computation. Reliability Engineering and System Safety, 222, Article 108365. https://doi.org/10.1016/j.ress.2022.108365

The accurate modeling of engineering systems and processes using Petri nets often results in complex graph representations that are computationally intensive, limiting the potential of this modeling tool in real life applications. This paper presents... Read More about Reduction of Petri net maintenance modeling complexity via Approximate Bayesian Computation.