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FP5

Irradiation Effects in Martensitic Steels under Neutron and Proton Mixed Spectrum Spire, Final Scientific and Technical Report

Project ID: FIKW-CT-2000-00058
Funded under: FP5-EAECTP C

Abstract

SPIRE project dealing with the "irradiation effects in martensitic steels under neutron and proton mixed spectrum", started in August 2000 and finished in July 2004. It was carried out with participation of eleven European partners and had as a main objective the investigation of the specific irradiation effects undergone by the structural materials constituting the spallation target of an Accelerator Driven System (ADS).
The high Chromium martensitic steels, 9-12%Cr, appeared to be the most promising candidates to resist such as severe irradiation conditions. So, the selected candidates are:
- Conventional 9Cr and 12Cr martensitic steels: 9Cr-1Mo (EM10), 9Cr1MoVNb (T91) and 12Cr1MoVW (HT9)
- Experimental alternative clean steels: 7-9 Cr1-2WTa.
To study the evolution of the microstructure and mechanical properties of these materials under conditions simulating the spallation environment, a large number of experiments were performed using important facilities existing in Europe like SINQ spallation source facility, Materials Testing Reactors (HFR, BR2), Jülich compact cyclotron for He-implantations, other ions accelerators, the corresponding hot cells for Post-irradiation Examinations and also BOR60 fast reactor implanted in RIAR (Russia).

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