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Kuleshova, E. A., Gurovich, B. A., Frolov, A. S., Fedotova, S. V., Maltsev, D. A., Krikun, E. V., Zhurko, D. A., & Bukina, Z. V. (2018). The Effect of Reducing Irradiation Temperature on the Structure and Radiation Embrittlement Mechanism of RPV Steels. KnE Materials Science, 4(1), 406–413. https://doi.org/10.18502/kms.v4i1.2191

https://doi.org/10.18502/kms.v4i1.2191

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authors

  • E A Kuleshova
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  • B A Gurovich
    No author data available.
  • A S Frolov
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  • S V Fedotova
    No author data available.
  • D A Maltsev
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  • E V Krikun
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  • D A Zhurko
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  • Z V Bukina
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Published Date

  • May 6, 2018

The Effect of Reducing Irradiation Temperature on the Structure and Radiation Embrittlement Mechanism of RPV Steels

KnE Materials Science / 15th International School-Conference "New Materials – Materials of Innovative Energy" (MIE) / Pages 406–413

Abstract

A complex research of RPV 15Kh2NMFA class 1 steel in different states was performed: in the initial state and after irradiatiion at different temperatures (50-300∘C). Low temperature (50-140∘C) irradiation was shown to cause the formation of dislocation loops of ultrahigh density. At the same time radiation-induced precipitates, being the main radiation-induced hardening phase at irradiation temperature of VVER reactors (∼300∘C), were absent. This leads to a higher radiation embrittlement rate after low-temperature irradiation as compared with irradiation at operating temperatures of VVER-1000. The radiation embrittlement coefficient values are 8.7 and 1.45 for (120-140)∘C and (290-315)∘C irradiation temperature, respectively.

References
[1] D. Terentyev, D.J. Bacon, Yu.N. Osetsky 2010 Philosophical Magazine 90 (7–8) 1019– 1033


[2] Stoller R.E. 1993 Proc. Int. Conf. “Effects of Radiation on materials”.–Philadelphia: ASTM STP 1175. 301-307.


[3] Regulations to control the mechanical properties of the metal of operating VVER- 1000-type RPVs based on surveillance specimens test results 1.3.2.01.0061 – 2009.