Multitechnique characterisation of 304L surface states oxidised at high temperature in steam and air atmospheres

Multitechnique characterisation of 304L surface states oxidised at high temperature in steam and... 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 http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Applied Surface Science Elsevier

Multitechnique characterisation of 304L surface states oxidised at high temperature in steam and air atmospheres

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Publisher
Elsevier
Copyright
Copyright © 2016 Elsevier B.V.
ISSN
0169-4332
eISSN
1873-5584
D.O.I.
10.1016/j.apsusc.2016.01.185
Publisher site
See Article on Publisher Site

Abstract

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

Journal

Applied Surface ScienceElsevier

Published: Apr 30, 2016

References

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