Metallurgical and mechanical properties of components

As an example of the metallurgical and mechanical properties of recently manufactured heavy section components, the properties of a nozzle shell with an integrated flange for an EPR reactor (Fig. 2.3) are described. The material is RCC-M Sectionll Part 1-M2112, which is SA508 Grade 3 Class 1 type equivalent. The nozzle portion of the component is around 600mm thick, which is more than twice the thickness of conventional shells for a PWRPV. 

15 Through-thickness macrostructure of the nozzle section of the nozzle shell. 

Tests on the mechanical and impact properties for the other RPV components have demonstrated conformity to the code requirements and excellent properties for the use of RPV components. 

Berger T, Murai E, Kurihara I, Nakamura T, Sasaki T, Yoshida T and Koyama T, Manufacturing and properties of nozzle shell with integral flange for EPR reactor pressure vessel . Ironmaking and Steelmaking, 2007,34,205-210. 

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