Material Characterisation and Selection for the International Research Project PRIMAVERA

The international research project "PRIMAVERA" is aiming at the development of a physically validated prediction model for transition temperature shift dependence ( ) of VVER-400 weld metals versus neutron fluence after reactor pressure vessel annealing. RRC «Kurchatov institute» (Russia), Fortum Nuclear Services and VTT Manufacturing Technology (Finland), JRC EC (The Netherlands) and IMS (Bulgaria) participate of "PRIMAVERA" project. The reactor pressure vessel of VVER type has several ring welds between forgings and are characterised large overall dimensions and related structure heterogeneity and mechanical properties variations. The weld metal results to be a mild low-alloy steel of pearlite class with rather complex structure depending on chemical composition, manufacturing technology and heat treatment. The selection of the weld sample is crucial for the success of the project and finally a critical weld with high phosphorus contents, weld 501 manufactured at Izhora plant following standard VVER-440/230 weld technology, has been identified and selected for the project.

CHERNOBAEVA Anna;  SHTROMBAH J;  KRJUKOV A;  ERAK D.;  PLATONOV P;  NIKOLAEV J;  KRASIKOV E.;  DEBARBERIS Luigi;  KOHOPAA Jyrki;  VALO M.;  VODENICHAROV Nicola; 

2008-01-31

ELSEVIER SCI LTD

JRC34106

0308-0161,   

http://dx.doi.org/10.1016/j.ijpvp.2006.09.016,    https://publications.jrc.ec.europa.eu/repository/handle/JRC34106,   

10.1016/j.ijpvp.2006.09.016,