KnE Materials Science
ISSN: 2519-1438
The latest conference proceedings on physical materials, energy materials, electrical materials.
The Effect of Reducing Irradiation Temperature on the Structure and Radiation Embrittlement Mechanism of RPV Steels
Published date: May 06 2018
Journal Title: KnE Materials Science
Issue title: 15th International School-Conference "New Materials – Materials of Innovative Energy" (MIE)
Pages: 406–413
Authors:
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.
