PSI - Issue 16

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

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ScienceDirect

Procedia Structural Integrity 16 (2019) 223–229

© 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 results of experimental studies of material behaviour at different temperatures ranges and loading rates are presented in this paper. Using finite element method, an analysis of the influence of various factors on the integrity of the reactor vessel of the nuclear power plant under the action of the melted corium during a severe accident. The experimental data of special tests of the metal was used. In the part of experimental research, the characteristics of strength and high temperature creep for 15Kh2NMFA steel at temperatures typical of a severe accident were obtained. An estimation of the behaviour of high-temperature steel under conditions of exposure at temperature + 650  C is carried out. New experimental data of steel deformation were obtained. Numerical simulation of the stress-strain state of the reactor vessel WWER-1000 under different conditions of a severe accident is presented. The variation of the residual wall thickness in the melting zone and different temperature of cooling of the outer surface of the vessel’s wall were considered in the analysis. © 2019 The Author(s). Published by Elsevier B.V. P er-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” Features of the estimation of the influence of various factors on the integrity of the RPV reactor under the action of a melt of metals during a severe accident Andrii Kotliarenko*, Alexander Chirkov, Valeriy Kharchenko Pisarenko Institute for Problems of Strength of the National Academy of Sciences of Ukraine, 2, Timiryazevs’ka St., Kyiv 01014, Ukraine The results of experimental studies of material behaviour at different temperatures ranges and loading rates are presented in this paper. Using finite element method, an analysis of the influence of various factors on the integrity of the reactor vessel of the nuclear power plant under the action of the melted corium during a severe accident. The experimental data of special tests of the metal was used. In the part of experimental research, the characteristics of strength and high temperature creep for 15Kh2NMFA steel at temperatures typical of a severe accident were obtained. An estimation of the behaviour of high-temperature steel under conditions of exposure at temperature + 650  C is carried out. New experimental data of steel deformation were obtained. Numerical simulation of the stress-strain state of the reactor vessel WWER-1000 under different conditions of a severe accident is presented. The variation of the residual wall thickness in the melting zone and different temperature of cooling of the outer surface of the vessel’s wall were considered in the analysis. 6th International Conference “Fracture Mechanics of Materials and Structural Integrity” Features of the estimation of the influence of various factors on the integrity of the RPV reactor under the action of a melt of metals during a severe accident Andrii Kotliarenko*, Alexander Chirkov, Valeriy Kharchenko Pisarenko Institute for Problems of Strength of the National Academy of Sciences of Ukraine, 2, Timiryazevs’ka St., Kyiv 01014, Ukraine Abstract Abstract Keywords: Reactor pressure vessels; structural integrity; IVR.

Keywords: Reactor pressure vessels; structural integrity; IVR.

* Corresponding author. E-mail address: kotliarenko@ipp.kiev.ua

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 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 * Corresponding author. E-mail address: kotliarenko@ipp.kiev.ua

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.2019.07.045