Development of High-Strength Ferritic/Martensitic Steel for FBR Core Materials.
Open Access
- 1 January 1991
- journal article
- Published by Atomic Energy Society of Japan in Journal of the Atomic Energy Society of Japan / Atomic Energy Society of Japan
- Vol. 33 (12) , 1157-1170
- https://doi.org/10.3327/jaesj.33.1157
Abstract
Alloy design, manufacturing and evaluation testing have been conducted to apply the ferritic/martensitic steel with superior swelling resistance for FBR core materials. This development was carried out with emphasis on the improvement of irradiation stability and high temperature strength of 12Cr type ferritic/martensitic steels.The optimized composition for ferritic/martensitic steel is Fe-0.12C-11Cr-0.5Mo-2W-0.4Ni-0.2V-0.05Nb-0.05N. To satisfy the requirements for cladding and wrapper tubes, the most suitable heat treatment for normalizing and tempering are 1, 100°C/780°C and 1, 050°C/700°C, respectively. This steel named PNC-FMS exhibits the highest level of high temperature strength among the ferritic/martensitic steels applicable to FBR core, and maintains a superior characteristics under the conditions of fast neutron exposure and high-temperature flowing sodium.Keywords
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