Title: Non-destructive Examination of Helium Implanted HTRs Construction Materials
Authors: VETERNIKOVA JanaDEGMOVA JarmilaKILPELÄINEN SimaSLUGEN VladimirTUOMISTO FilipRÄISÄNEN JyrkiKRSJAK VLADIMIRPETRISKA MartinSOJAK StanislavHINCA RobertSTACHO Matus
Citation: NUCLEAR ENGINEERING AND DESIGN vol. 251 p. 354-359
Publisher: ELSEVIER SCIENCE SA
Publication Year: 2012
JRC N°: JRC65562
ISSN: 0029-5493
URI: http://www.sciencedirect.com/science/article/pii/S002954931100879X
http://publications.jrc.ec.europa.eu/repository/handle/JRC65562
DOI: 10.1016/j.nucengdes.2011.09.059
Type: Articles in Journals
Abstract: High chromium steels belong to the most prospective materials for reactor pressure vessel of High Temperature Reactors as well as for more components used in GEN IV facilities. Radiation resistance of GEN IV materials is a significant attribute. Therefore the process of microstructure deterioration due to irradiation followed by degradation of mechanical properties must be consistently investigated. This paper is focused on microstructure study of 9% chromium steels (T91, P91) and observation of residual stress as well as open volume defect accumulation after helium ion implantation performed at room temperature. Helium ion implantation should simulate changes of structure due to knocking-out of atoms during neutron irradiation. Investigated materials were studied by non-destructive experimental techniques based on the positron annihilation in the matter (Positron Annihilation Spectroscopy, Doppler Broadening Spectroscopy) and magnetic properties of iron alloys (Magnetic Barkhausen Noise Measurement). Results indicate higher resistance of T91 to defect formation during implantation than P91, although T91 shows higher residual stress in microstructure prior to implantation.
JRC Institute:Institute for Energy and Transport

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