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    STP1405

    Behavior of Different Austenitic Stainless Steels, Conventional, Reduced Activation (RA) and ODS Chromium-Rich Ferritic-Martensitic Steels Under Neutron Irradiation at 325°C in PWR Environment

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    Abstract

    The main objective of this paper is to summarize CEA data recently obtained on different kinds of steels irradiated at 325°C in the Osiris experimental reactor in a typical PWR environment, that is, pressurized water — P=155 bars — with controlled PWR type chemistry. The different steels studied can be classified in four groups: 304/316 type austenitic stainless steels, conventional 9–12%Cr(Mo,V,Nb) and reduced activation 7.5–11%Cr(W,V,Ta) martensitic steels, and two ferritic-martensitic alloys strengthened by oxide dispersion (ODS). Some of those steels have been included with different initial metallurgical conditions, that is, (1) for austenitic steels : solution annealed and cold-worked structures; (2) for martensitic steels : tempered, cold-worked and as-quenched martensitic structures. This experimental irradiation, named “Alexandre”, has been carried out in the Osiris experimental reactor (under a mixed fast/thermal neutron flux) for different neutron fluence levels with a maximum irradiation damage of ∼9dpa. The main results obtained are discussed, with a special emphasis on the chemical composition and initial metallurgical condition effects on the tensile and uniform corrosion properties of both conventional and reduced activation chromium-rich martensitic steels.

    Keywords:

    304/316, 8–12%Cr martensitic steels, reduced activation, ODS, neutron irradiation at 325°C, tensile properties, uniform corrosion, PWR environment


    Author Information:

    Brachet, J-C
    Commissariat à l'Energie Atomique, CEA-Saclay, Gif-Sur-Yvette,

    Averty, X
    Commissariat à l'Energie Atomique, CEA-Saclay, Gif-Sur-Yvette,

    Lamagnère, P
    Commissariat à l'Energie Atomique, CEA-Saclay, Gif-Sur-Yvette,

    Alamo, A
    Commissariat à l'Energie Atomique, CEA-Saclay, Gif-Sur-Yvette,

    Rozenblum, F
    Commissariat à l'Energie Atomique, CEA-Saclay, Gif-Sur-Yvette,

    Raquet, O
    Commissariat à l'Energie Atomique, CEA-Saclay, Gif-Sur-Yvette,

    Bertin, J-L
    Commissariat à l'Energie Atomique, CEA-Saclay, Gif-Sur-Yvette,


    Committee/Subcommittee: E10.02

    DOI: 10.1520/STP10553S