| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 7966464 | Journal of Nuclear Materials | 2015 | 6 Pages |
Abstract
The peculiarities of gas porosity formation and helium retention and release in reactor ferritic/martensitic EP-450 and EP-450-ODS and austenitic ChS-68 steels are investigated by transmission electron microscopy and helium thermal desorption spectrometry (HTDS). The samples were irradiated by 40 keV He+ ions up to a fluence of 5 · 1020 mâ2 at 293 and 923 K. An nonuniform distribution of helium bubbles and high-level gas swelling in ferritic/martensitic steels were found at high-temperature helium implantation. The same irradiation conditions result in formation of uniformly distributed helium bubbles and low-level swelling in ChS-68 steel. Temperature range of helium release from EP-450-ODS steel was considerably wider in comparison to HTDS-spectra of the EP-450 steel. A considerable quantity of helium is released from ODS steel in the high-temperature range after the main peak of the HTDS-spectrum.
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Nuclear Energy and Engineering
Authors
I.I. Chernov, B.A. Kalin, Ð.S. Staltsov, Kyi Zin Oo, S.Yu. Binyukova, O.S. Staltsova, A.A. Polyansky, V.S. Ageev, A.A. Nikitina,