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Article | REF: BN3732 V1

Welding of the Main Components of Pressurized Water Recator Nuclear Power Plants

Authors: Denis BUISINE, Gérard PERRAT

Publication date: January 10, 2016

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1. Welding the nuclear boiler

1.1 Overview of materials used in nuclear boiler components

The base materials for pressure vessels such as vessels, steam generators (SGs) and pressurizers are made of low-alloy manganese-nickel-molybdenum steel with a bainitic structure . The base grade 16MnNiMo05, known as "16MND5", guarantees an excellent compromise between pressure resistance (up to 150 bar) at high temperatures (up to 350°C) and toughness. The first pressure vessels for 900 MW nuclear power...

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