PSI - Issue 50

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2022) 000 – 000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2022) 000 – 000

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

ScienceDirect

Procedia Structural Integrity 50 (2023) 178–183

© 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 the scientific committee of the MRDMS 2022 organizers Abstract A technique for studying the stress-strain state of structural elements exposed to an aggressive liquid metal with temperatures up to 500 °C was developed. Strain gauges were used to solve the problem installed on the internal and external surfaces of the equipment. The operability of measuring instruments was checked during bench tests under conditions close to operational ones. An algorithm was proposed to determine the stresses at dangerous points of the structure. The developed technique was assessed during tests of a BN-type nuclear reactor. © 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 the scientific committee of the MRDMS 2022 organizers Keywords: full-scale strain studies; stress-strain state; power equipment; liquid metal coolant; computational-experimental procedures. 1. Introduction Due to the increase in the working parameters of the created power, transport, and special units (Babushkin S.V. et al., 2020), there is a problem with the development or improvement of methods and means of experimental control, providing information on the stressed state of the most loaded elements of such structures during bench tests Application of a full-scale strain gauge to study the stress-strain state of structures subjected to the action of a liquid-metal coolant at high temperatures Maslov S.V.* Blagonravov Mechanical Engineering Research Institute of Russian Academy of Science (IMASH RAN), 4 Maly Kharitonyevsky Pereulok, Moscow 101990, Russia Abstract A technique for studying the stress-strain state of structural elements exposed to an aggressive liquid metal with temperatures up to 500 °C was developed. Strain gauges were used to solve the problem installed on the internal and external surfaces of the equipment. The operability of measuring instruments was checked during bench tests under conditions close to operational ones. An algorithm was proposed to determine the stresses at dangerous points of the structure. The developed technique was assessed during tests of a BN-type nuclear reactor. © 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 the scientific committee of the MRDMS 2022 organizers Keywords: full-scale strain studies; stress-strain state; power equipment; liquid metal coolant; computational-experimental procedures. 1. Introduction Due to the increase in the working parameters of the created power, transport, and special units (Babushkin S.V. et al., 2020), there is a problem with the development or improvement of methods and means of experimental control, providing information on the stressed state of the most loaded elements of such structures during bench tests 16th International Conference on Mechanics, Resource and Diagnostics of Materials and Structures (MRDMS 2022) Application of a full-scale strain gauge to study the stress-strain state of structures subjected to the action of a liquid-metal coolant at high temperatures Maslov S.V.* Blagonravov Mechanical Engineering Research Institute of Russian Academy of Science (IMASH RAN), 4 Maly Kharitonyevsky Pereulok, Moscow 101990, Russia 16th International Conference on Mechanics, Resource and Diagnostics of Materials and Structures (MRDMS 2022)

* Corresponding author. Tel.: +7-495-628-8730 E-mail address: maslovsv@inbox.ru * Corresponding author. Tel.: +7-495-628-8730 E-mail address: maslovsv@inbox.ru

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 the scientific committee of the MRDMS 2022 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 the scientific committee of the MRDMS 2022 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 the scientific committee of the MRDMS 2022 organizers 10.1016/j.prostr.2023.10.039