PSI - Issue 60

Available online at www.sciencedirect.com

ScienceDirect

Available online at www.sciencedirect.com Available online at www.sciencedirect.com Structural Integrity Procedia 00 (2023) 000–000

ScienceDirect

www.elsevier.com/locate/procedia

ScienceDirect

Procedia Structural Integrity 60 (2024) 525–534 Structural Integrity Procedia 00 (2023) 000–000

www.elsevier.com/locate/procedia

© 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 the ICONS 2023 Organizers Abstract A large number of tests have been performed on piping components of Indian Nuclear Power Plants, to study their fracture behavior and generate the fracture properties, and to validate the failure models. The materials of these piping components are carbon steel and stainless-steel welds, and tests were conducted under monotonic/cyclic loading conditions. During these component tests the crack growth data measurements in sync with the applied load and load line displacement (LLD) were required to facilitate post- test calculation of fracture resistance J-R curve. Unlike in small specimens (like CT, TPB, etc.), the compliance function for large components like pipes and elbows are not available. Further, it is known that in these materials the crack growth happens in out- of-plane and, the angle at which it grows cannot be anticipated in advance. This phenomenon imposes further limitation on usage of conventional methods like compliance based / potential drop-based method used for crack growth measurement. Therefore, a new Imaging based technique was developed in-house in 2018 and used to measure crack growth during these tests during 2020 21. In this technique the synchronous images of both the crack tips and related image of computer screen showing values of applied load, LLD, etc. are acquired using single click button. The software required for synchronous acquisition of images from various cameras during fracture experiments was developed. Each image set contains images of both crack tips, and Load and LLD image. Subsequently, the crack tip images were manually analyzed to obtain the magnitude of crack growth with applied loading. This paper narrates the developed imaging system setup followed by a discussion on the software for image acquisition. Abstract A large number of tests have been performed on piping components of Indian Nuclear Power Plants, to study their fracture behavior and generate the fracture properties, and to validate the failure models. The materials of these piping components are carbon steel and stainless-steel welds, and tests were conducted under monotonic/cyclic loading conditions. During these component tests the crack growth data measurements in sync with the applied load and load line displacement (LLD) were required to facilitate post- test calculation of fracture resistance J-R curve. Unlike in small specimens (like CT, TPB, etc.), the compliance function for large components like pipes and elbows are not available. Further, it is known that in these materials the crack growth happens in out- of-plane and, the angle at which it grows cannot be anticipated in advance. This phenomenon imposes further limitation on usage of conventional methods like compliance based / potential drop-based method used for crack growth measurement. Therefore, a new Imaging based technique was developed in-house in 2018 and used to measure crack growth during these tests during 2020 21. In this technique the synchronous images of both the crack tips and related image of computer screen showing values of applied load, LLD, etc. are acquired using single click button. The software required for synchronous acquisition of images from various cameras during fracture experiments was developed. Each image set contains images of both crack tips, and Load and LLD image. Subsequently, the crack tip images were manually analyzed to obtain the magnitude of crack growth with applied loading. This paper narrates the developed imaging system setup followed by a discussion on the software for image acquisition. Keywords: Component Fracture testing; Imaging; Crack Growth; Image Acquisition, Image Processing; Third International Conference on Structural Integrity 2023 (ICONS 2023) Online imaging system for component integrity test S.S. Satpute a * , M. K. Sahu a *, Suranjit Kumar a , Swati A. H b ., Rajesh B. b , Valli K. b , Wadnerkar A. b Third International Conference on Structural Integrity 2023 (ICONS 2023) Online imaging system for component integrity test S.S. Satpute a * , M. K. Sahu a *, Suranjit Kumar a , Swati A. H b ., Rajesh B. b , Valli K. b , Wadnerkar A. b a Reactor Safety Division, Bhabha Atomic Research Centre, Mumbai 400085, India b Security Electronics & Cyber Technology Division, BARC, Mumbai 400085, India a Reactor Safety Division, Bhabha Atomic Research Centre, Mumbai 400085, India b Security Electronics & Cyber Technology Division, BARC, Mumbai 400085, India

Keywords: Component Fracture testing; Imaging; Crack Growth; Image Acquisition, Image Processing; * Corresponding author. Tel.: +91-22-25593557. E-mail address: mksahu@barc.gov.in

* Corresponding author. Tel.: +91-22-25593557. E-mail address: mksahu@barc.gov.in 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 the ICONS 2023 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 the ICONS 2023 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 the ICONS 2023 Organizers 10.1016/j.prostr.2024.05.072