Microstructure in a cast stainless steel used for a PLR pump casing cover in a BWR was investigated by atom probe tomography and nanoindentation testing. Ferrite phase decomposition and G-phase precipitation were no t observed in the as-received PLRP casing cover. Thermal aging and solution treatment were carried out on the as-received PLRP casing cover and an unused model alloy of cast stainless steel. The ferrite phase decomp osition and G-phase precipitates in the thermal aged model alloy disappeared af...
英字タイトル:
Microstructure in cast stainless steel used for long-term in BWR environment

Between 2010 and 2015 the American Society of Testing and Materials (ASTM) developed a new embrittlement trend curve (ETC) to represent trends in a large international collection of reactor pressure vessel (RPV) surveillance data. This work was concluded in 2015 and resulted in an update to the ASTM Standard E900. In this paper we explore options for using an E900-15 style fitting function to represent trends in surveillance data collected from Japanese nuclear power plants....
英字タイトル:
Options for Using an ASTM E900-15-Style Function to Represent Trend in Domestic RPV Surveillance Data

Irradiation embrittlment prediction of Japanese surveillance data and MTR irradiation data was performed by using five different embrittlement trend curves, RG.1.99R2, ENOY, E900-15, EDF2010 and JEAC4201-2007[2013 addendum] (JEAC4201-2013). The comparison result showed that the prediction by JEAC 4201-2013 brought more appropriate prediction results than those by the other curves....
英字タイトル:
Embrittlement predictions of Japanese surveillance data using the typical embrittlement trend curves in the world