Comparative small angle neutron scattering (SANS) study of Eurofer97 steel neutron irradiated in mixed (HFR) and fast spectra (BOR60) reactors

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• 作者：R. Coppola^a ; ^{roberto.coppola@enea.it} ; E. Gaganidze^b ; M. Klimenkov^b ; C. Dethloff^b ; R. Lindau^b ; M. Valli^c ; J. Aktaa^b ; A. Mö ; slang^b
• 关键词：Neutron irradiation ; Ferritic/martensitic steels ; Small-angle neutron scattering ; Electron microscopy
• 刊名：Nuclear Materials and Energy
• 出版年：2016
• 出版时间：December 2016
• 年：2016
• 卷：9
• 期：Complete
• 页码：189-193
• 全文大小：1028 K
• 卷排序：9

文摘

Small angle neutron scattering (SANS) measurements have been carried out on Eurofer97 neutron irradiated in mixed (HFR) and fast spectrum (BOR60) reactors; the investigated “SPICE” sample had been irradiated to 16 dpa at 250 °C, the investigated “ARBOR” one had been irradiated to 32 dpa at 330 °C. The detected increase in the respective SANS cross-sections of these two samples under irradiation is attributed primarily to the presence of micro-voids, finding micro-void volume fraction of 1.3% for the “SPICE” sample and of 0.6% for the “ARBOR” one. This is tentatively attributed to the fact that there is nearly no helium production in BOR 60 whereas ∼10 appm He is produced after HFR irradiation of Eurofer97: though 10 appm is not large, it can play a significant role in stabilizing the micro-voids during irradiation; correlation with electron microscopy results on the same samples is also discussed.