PSI - Issue 16

Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2019) 000 – 000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2019) 000 – 000

www.elsevier.com/locate/procedia

www.elsevier.com/locate/procedia

ScienceDirect

Procedia Structural Integrity 16 (2019) 161–168

© 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the 6th International Conference “Fracture Mechanics of Materials and Structural Integrity” organizers. © 2019 The Author(s). Published by Elsevier B.V. Peer- review under responsibility of the 6th International Conference “Fracture Mechanics of Materials and Structural Integrity” organizers The paper will sho xamples on the substantial role and importance of non-destructive evaluation in ensuring nuclear comp nent’s long -term integrity. The xamples are selected from the t chnical justificatio of service life extension of Pak Nuclear Power Plant, Hungary. They will cover ultrasonic and eddy current xaminations of critical areas a d sub-components of the reactor pres ure vessel, the reactor internals, the steam generator and some pipeline systems. The results contributed to completion of key time-limited ageing analyses which were absolutely necessary for getting the operating licen e beyond the de ign life. © 2019 The Author(s). Published by Elsevier B.V. Peer- review under responsibility of the 6th International Conference “Fracture Mechanics of Materials and Structural Integrity” organizers 6th International Conference “Fracture Mechanics of Materials and Structural Integrity” Role and importance of NDE in nuclear power plant life extension Peter Trampus University of Dunaújváros, Táncsics Mihály u. 1/a, Dunaújváros 2400, Hungary Abstract Nuclear power plants are ageing but there is a need for their further use. Ageing may lead to the gradual degradation of the safety margins of structures and components. Service life extension of nuclear power plants became a world tendency, the key condition of which is the as surance of components’ structural integrity until the end of the extended lifetime. Non-destructive evaluation is a solid pillar of structural integrity assessment, and in the case of nuclear power plants, the general objectives (social and commercial) of non-destructive evaluation are highly relevant. The paper will show examples on the substantial role and importance of non-destructive evaluation in ensuring nuclear component’s long -term integrity. The examples are selected from the technical justification of service life extension of Paks Nuclear Power Plant, Hungary. They will cover ultrasonic and eddy current examinations of critical areas and sub-components of the reactor pressure vessel, the reactor internals, the steam generator and some pipeline systems. The results contributed to completion of key time-limited ageing analyses which were absolutely necessary for getting the operating license beyond the design life. 6th International Conference “Fracture Mechanics of Materials and Structural Integrity” Role and importance of NDE in nuclear power plant life extension Peter Trampus University of Dunaújváros, Táncsics Mihály u. 1/a, Dunaújváros 2400, Hungary Abstr ct Nuclear power plants are ageing but there is a need for their further u e. Ageing may lead to the gra ual d gradation of the safety margins of structures and c mponents. Service life extension of nuclear power plants becam a world tendency, th key c ndition of which is the as surance of components’ structural integrity until th nd of the extended lifetime. Non-destructive evaluation i a solid pillar of structural i t grity asses ment, and in the case of n clear power plants, the general objectiv s (social and commercial) of non-destructive evaluation are highly rele ant. Keywords: non-destructive evaluation; service life extension; nuclear powerplant; time-limited ageing analysi

Keywords: non-destructive evaluation; service life extension; nuclear powerplant; time-limited ageing analysi

* Corresponding author. E-mail address: trampus@uniduna.hu * Corresponding author. E-mail address: trampus@uniduna.hu 1. Introduction

1. Introduction

2452-3216 © 2019 The Author(s). Published by Elsevier B.V. Peer- review under responsibility of the 6th International Conference “Fracture Mechanics of Materials and Structural Integrity” organizers Currently the world faces the global climate change. A drastic reduction of greenhouse gas emission is unavoidable while, simultaneously, the energy access and economic opportunity to billions of people is expanding. Climate change and energy are strongly interlinked because generation related emissions account for a significant portion of 2452-3216 © 2019 The Author(s). Published by Elsevier B.V. Peer- review under responsibility of the 6th International Conference “Fracture Mechanics of Materials and Structural Integrity” organizers Currently the world faces the global climate change. A drastic reduction of greenhouse gas emission is unavoidable while, simultaneously, the energy access and economic opportunity to billions of people is expanding. Climate change and energy are strongly interlinked because generation related emissions account for a significant portion of

2452-3216  2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the 6th International Conference “Fracture Mechanics of Materials and Structural Integrity” organizers. 10.1016/j.prostr.2019.07.036