PSI - Issue 64

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ScienceDirect Structural Integrity Procedia 00 (2023) 000–000 Structural Integrity Procedia 00 (2023) 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 64 (2024) 766–773

SMAR 2024 – 7th International Conference on Smart Monitoring, Assessment and Rehabilitation of Civil Structures Evaluation of the Structural Response of the Containment Structure of a NPP to Internal Pressure and Thermal Gradients Federico Pinto a,b, *, Marcelo A. Ceballos a,b , Carlos F. Estrada a , Antonio Prato a , Carlos A. Prato a a Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de Córdoba, Argentina (www.efn.uncor.edu) b Consejo Nacional de Investigaciones Científicas y Técnicas, Argentina (www.conicet.gov.ar) Abstract As a final task for the life-extension program of the Embalse NPP located in Córdoba, Argentina, the pre-stressed concrete Containment Structure (CS) has recently been subjected to a pressure leak-rate test after more than 30 years of service. The test was carried out at the start of the summer season, following the completion of a general overhaul of main functional components; the CS had previously been inspected, and successfully passed a first evaluation before the implementation of its life extension process. This paper is concerned with the analysis of the structural response of the CS to internal pressure and comparison of model predictions with full-scale test results. The stated purpose is focused on assessing the structural response of the CS through the measured displacements and strains caused by the prescribed pressurization sequence. Special attention is given to thermal changes caused by exposure to sun radiation and daily temperature changes over the course of almost one-month duration of the test sequence. © 2024 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 SMAR 2024 Organizers Keywords: NPP Containment Structure; pressue leak-rate test; mechanical behavior numerical prediction; thermal strain corrections SMAR 2024 – 7th International Conference on Smart Monitoring, Assessment and Rehabilitation of Civil Structures Evaluation of the Structural Response of the Containment Structure of a NPP to Internal Pressure and Thermal Gradients Federico Pinto a,b, *, Marcelo A. Ceballos a,b , Carlos F. Estrada a , Antonio Prato a , Carlos A. Prato a a Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de Córdoba, Argentina (www.efn.uncor.edu) b Consejo Nacional de Investigaciones Científicas y Técnicas, Argentina (www.conicet.gov.ar) Abstract As a final task for the life-extension program of the Embalse NPP located in Córdoba, Argentina, the pre-stressed concrete Containment Structure (CS) has recently been subjected to a pressure leak-rate test after more than 30 years of service. The test was carried out at the start of the summer season, following the completion of a general overhaul of main functional components; the CS had previously been inspected, and successfully passed a first evaluation before the implementation of its life extension process. This paper is concerned with the analysis of the structural response of the CS to internal pressure and comparison of model predictions with full-scale test results. The stated purpose is focused on assessing the structural response of the CS through the measured displacements and strains caused by the prescribed pressurization sequence. Special attention is given to thermal changes caused by exposure to sun radiation and daily temperature changes over the course of almost one-month duration of the test sequence. © 2024 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 SMAR 2024 Organizers Keywords: NPP Containment Structure; pressue leak-rate test; mechanical behavior numerical prediction; thermal strain corrections © 2024 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 SMAR 2024 Organizers

* Corresponding author. Federico Pinto. E-mail address: fpinto@unc.edu.ar Postal address: Vélez Sarsfield 1611, X5016GCA, Córdoba, Argentina * Corresponding author. Federico Pinto. E-mail address: fpinto@unc.edu.ar Postal address: Vélez Sarsfield 1611, X5016GCA, Córdoba, Argentina

2452-3216 © 2024 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 SMAR 2024 Organizers 2452-3216 © 2024 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 SMAR 2024 Organizers

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