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Actual Problems of Structural Integrity Assessment of WWER-1000 Pressure Vessel Internals

  • O. V. Makhnenko
  • S. M. KandalaEmail author
Conference paper
Part of the Structural Integrity book series (STIN, volume 8)

Abstract

The problem of numerical prediction of the process of radiation swelling in internal elements for assessment of structural integrity and prolonging the lifetime of the WWER-1000 reactors is quite actual. The critical element is core baffle, which is operating under high gradients of neutron irradiation and temperature. The influence of features of various fuel campaigns and their sequence on the distribution and the maximum value of radiation swelling, as well as, on stresses and distortions in the baffle after long-term service. The consequences of a possible decrease in the efficiency of cooling on the external surface of the baffle in the event of a gap closing between the barrel and the baffle due to radiation swelling or prediction tolerances are reviewed. According to result of modeling the recommendation for numerical assessment of residual life of internal baffle WWER-1000 reactor are formulated.

Keywords

Reactor WWER-1000 Internals Baffle Barrel Radiation swelling Heat exchange 

References

  1. 1.
    Harutyunyan, D., Mirzov, I., Schulc, M.: Void swelling in VVER-1000 pressure vessel internals. M&C 2017. In: International Conference on Mathematics & Computational Methods Applied to Nuclear Science & Engineering, Jeju, Korea, April 16–20, 2017, on USB (2017)Google Scholar
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    Margolin, B.Z., Murashova, A.I., Neustroev, V.S.: Analysis of influence of stressed state type on radiation swelling and radiation creep of austenitic steels. Probl. Prochn. 3, 5–24 (2012)Google Scholar
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    Mirzov, I., Kandala, S.: Method of Parametric Assignment of Input Data for Irradiation Swelling Calculation of VVER1000 Internals. Nucl. Radiat. Saf. 3, 23–27 (2016)CrossRefGoogle Scholar

Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  1. 1.E.O. Paton Electric Welding Institute of the NAS of UkraineKyivUkraine

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