Article history: In case of a severe accident occurring in a nuclear reactor, surfaces of the reactor coolant system (RCS), Received 17 November 2015 made of stainless steel (304L) rich in Cr (>10%) and Ni (8–12%), are oxidised. Fission products (FPs) are Received in revised form 20 January 2016 released from melt fuel and ﬂow through the RCS. A part of them is deposited onto surfaces either Accepted 21 January 2016 by vapour condensation or by aerosol deposition mechanisms. To be able to understand the nature of Available online 27 January 2016 interactions between these FPs and the RCS surfaces, a preliminary step is to characterize the RSC surface states in steam and air atmosphere at high temperatures. Pieces of 304L stainless steel have been treated Keywords: ◦ ◦ in a ﬂow reactor at two different temperatures (750 C and 950 C) for two different exposition times Oxidation (24 h and 72 h). After surfaces analysing by a unique combination of surface analysis techniques (XPS, Stainless steel ToF-SIMS and LEIS), for 304L, the results show a deep oxide scale with multi layers and the outer layer is XPS composed of chromium and manganese oxides. Oxide proﬁles differ in air
Applied Surface Science – Elsevier
Published: Apr 30, 2016
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