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Nano-cavities observed in a 316SS PWR flux thimble tube irradiated to 33 and 70 dpa
Pacific North West Laboratories, Richland, WA, USA.ORCID iD: 0000-0003-1498-5691
Pacific North West Laboratories, Richland, WA, USA.
Pacific North West Laboratories, Richland, WA, USA.
Vattenfall AB Ringhals, SE-430-22 Väröbacka, Sweden.
2009 (English)In: Journal of Nuclear Materials, ISSN 0022-3115, E-ISSN 1873-4820, Vol. 384, no 3, 249-255 p.Article in journal (Refereed) Published
Abstract [en]

The radiation-induced microstructure of a cold-worked 316SS flux thimble tube from an operating pressurized water reactor (PWR) was examined. Two irradiated conditions, 33 dpa at 290 degrees C and 70 dpa at 315 degrees C were examined by transmission electron microscopy. The original dislocation network had completely disappeared and was replaced by fine dispersions of Frank loops and small nano-cavities at high densities. The latter appear to be bubbles containing high levels of helium and hydrogen. An enhanced distribution of these nano-cavities was found at grain boundaries and may play a role in the increased susceptibility of the irradiated 316SS to intergranular failure of specimens from this tube during postirradiation slow strain rate testing in PWR water conditions.

Place, publisher, year, edition, pages
Elsevier, 2009. Vol. 384, no 3, 249-255 p.
Keyword [en]
Irradiation effects, Stainless steels, microstructure, voids, TEM
National Category
Metallurgy and Metallic Materials
URN: urn:nbn:se:kth:diva-78687DOI: 10.1016/j.jnucmat.2008.11.025ISI: 000263986700008OAI: diva2:492768
QC 20120208Available from: 2012-02-08 Created: 2012-02-08 Last updated: 2012-02-08Bibliographically approved

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