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Creep and Irradiation Effects in Reactor Vessel Internals

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Creep in Structures VI (IUTAM 2023)

Part of the book series: Advanced Structured Materials ((STRUCTMAT,volume 194))

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Abstract

The paper is devoted to the presentation of the calculation method for determining the stress–strain state and long-term strength of reactor vessel internals (RVI) and the description of the results obtained with its help. The method is based on a complete mathematical formulation of the boundary- initial value problems of creep accompanied by irradiation effects. Deformation and damage accumulation caused by irradiation effects in the material when interacting with the effects caused by thermal creep, can significantly limit the safe operation of RVI. Elastic, thermoelastic, thermal and irradiation creep, irradiation swelling strains, creep damage and fracture are considered. The numerical solution of the boundary value problems is performed by the FEM, and the initial value problems are solved by time integration. To estimate cyclic deformation and fracture, the procedures of asymptotic methods and averaging over cycle periods are used. As an examples of the use of this calculation method, the results of creep modelling of fuel element, T-joint of tubes and notched plates are given. The issues of interaction of stresses, strains and damages of different nature under complex stress state are discussed.

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Author information

Authors and Affiliations

  1. Department of Computer Modelling of Processes and Systems, National Technical University “Kharkiv Polytechnic Institute”, Kharkiv, UKR-61002, Ukraine

    Dmytro Breslavsky & Oksana Tatarinova

Authors
  1. Dmytro Breslavsky
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  2. Oksana Tatarinova
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Corresponding author

Correspondence to Dmytro Breslavsky .

Editor information

Editors and Affiliations

  1. Chair of Engineering Mechanics, Institute of Mechanics, Otto-von-Guericke-University of Magdeburg, Magdeburg, Germany

    Holm Altenbach

  2. Chair of Engineering Mechanics, Institute of Mechanics, Otto-von-Guericke-University of Magdeburg, Magdeburg, Sachsen-Anhalt, Germany

    Konstantin Naumenko

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Breslavsky, D., Tatarinova, O. (2023). Creep and Irradiation Effects in Reactor Vessel Internals. In: Altenbach, H., Naumenko, K. (eds) Creep in Structures VI. IUTAM 2023. Advanced Structured Materials, vol 194. Springer, Cham. https://doi.org/10.1007/978-3-031-39070-8_5

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