Development of 2012 edition of JSME code for design and construction of fast reactors, 3; Development of the material strength standard of modified 9Cr-1Mo steel

Onizawa, Takashi  ; Nagae, Yuji ; Takaya, Shigeru  ; Asayama, Tai 

This paper describes the material strength standard of Modified 9Cr-1Mo (ASME Gr.91) steel in the design code for fast reactors of 2012 edition published by the Japan Society of Mechanical Engineers. Modified 9Cr-1Mo is to be used for primary and secondary coolant circuits, including intermediate heat exchangers and steam generators for the Japan Sodium Cooled Fast Reactor (JSFR). Application of Modified 9Cr-1Mo to JSFR needs the material strength standard. Therefore, the authors developed the material strength standard. This paper describes the contents of the material strength standard.