PSI - Issue 46

ScienceDirect Structural Integrity Procedia 00 (2021) 000–000 Structural Integrity Procedia 00 (2021) 000–000 Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Available online at www.sciencedirect.com ScienceDirect

www.elsevier.com/locate/procedia www.elsevier.com/locate/procedia

Procedia Structural Integrity 46 (2023) 189–196

5th International Conference on Structural Integrity and Durability On fundamental issues of the structural integrity of large-scale pressure systems Tamás Fekete a * a Centre for Energy Research, Konkoly-Thege M. str. 29-33., H-1121 Budapest, Hungary 5th International Conference on Structural Integrity and Durability On fundamental issues of the structural integrity of large-scale pressure systems Tamás Fekete a * a Centre for Energy Research, Konkoly-Thege M. str. 29-33., H-1121 Budapest, Hungary

© 2023 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of ICSID 2021 Organizers Abstract A long-standing research project at the Centre for Energy Research in Budapest, Hungary is ongoing to develop a solid basis for future Structural Integrity Calculations of Large-Scale Pressure Systems. Methodological issues are at the heart of Structural In tegrity Calculations. Despite the fact that many complex Large-Scale Pressure Systems have been built and operated over the past nearly one hundred years, guided by standards-based engineering approaches, research has shown that there are inherent problems even at the core of these methodologies. Generalised Concept of Structural Integrity is appearing to be a promising framework to provide a solid foundation for future Structural Integrity Calculation methodologies of Large-Scale Pressure Systems. The paper outlines the structure of the new concept, showing how philosophical considerations can be used to provide a more robust scientific approach towards a theoretical framework for a modern structural integrity methodology, and presents the basis for a state-of-the art thermodynamics-based model that seems promising for future Structural Integrity Calculation methodologies of Large-Scale Pressure Systems. © 2021 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of ICSID 2021 Organizers Keywords: Structural Integrity; Large-Scale Pressure Systems; Thermomechanics; Ageing; Fracture mechanics 1. Introduction It is a longstanding human experience that any man-made solid physical system –e.g., tools, equipment, infrastruc ture– is fit for purpose for only a limited time. It is a commonly observed phenomenon that after a certain time, the Abstract A long-standing research project at the Centre for Energy Research in Budapest, Hungary is ongoing to develop a solid basis for future Structural Integrity Calculations of Large-Scale Pressure Systems. Methodological issues are at the heart of Structural In tegrity Calculations. Despite the fact that many complex Large-Scale Pressure Systems have been built and operated over the past nearly one hundred years, guided by standards-based engineering approaches, research has shown that there are inherent problems even at the core of these methodologies. Generalised Concept of Structural Integrity is appearing to be a promising framework to provide a solid foundation for future Structural Integrity Calculation methodologies of Large-Scale Pressure Systems. The paper outlines the structure of the new concept, showing how philosophical considerations can be used to provide a more robust scientific approach towards a theoretical framework for a modern structural integrity methodology, and presents the basis for a state-of-the art thermodynamics-based model that seems promising for future Structural Integrity Calculation methodologies of Large-Scale Pressure Systems. © 2021 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of ICSID 2021 Organizers Keywords: Structural Integrity; Large-Scale Pressure Systems; Thermomechanics; Ageing; Fracture mechanics 1. Introduction It is a longstanding human experience that any man-made solid physical system –e.g., tools, equipment, infrastruc ture– is fit for purpose for only a limited time. It is a commonly observed phenomenon that after a certain time, the

* Corresponding author. Tel.: 36-1-392 2222/ Ext 3403; fax: +36-1-395 9152. E-mail address: fekete.tamas@ek-cer.hu * Corresponding author. Tel.: 36-1-392 2222/ Ext 3403; fax: +36-1-395 9152. E-mail address: fekete.tamas@ek-cer.hu

2452-3216 © 2021 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of ICSID 2021 Organizers 2452-3216 © 2021 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of ICSID 2021 Organizers

2452-3216 © 2023 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of ICSID 2021 Organizers 10.1016/j.prostr.2023.06.032