Structure and Mechanical Properties of Welded Joints of Large Steel Forgings for Nuclear Power Plants of MIR 1200 Type

Author:

Hermanova Sarka1,Kosňovská Jana1,Kander Ladislav1

Affiliation:

1. Material and Metallurgical Research Ltd.

Abstract

The paper deals with research, development and verification of production technology of selected welded joints for pressure vessels located in primary circuit of nuclear power plants type MIR 1200. Effects of various welding technologies on mechanical and fracture properties were studied. Four types of weld joints made of 10GN2MFA steel grade were prepared for experimental programme consisted of testing of conventional mechanical (tensile and impact tests) as well as fracture toughness and low-cycle fatigue tests and also stress corrosion cracking test in water environment. Effect of elevated operating temperature on material properties was evaluated, too.

Publisher

Trans Tech Publications, Ltd.

Subject

Condensed Matter Physics,General Materials Science,Atomic and Molecular Physics, and Optics

Reference7 articles.

1. ČSN EN ISO 15607 Specification and qualification of welding procedures for metallic materials - General rules. Praha: Česká agentura pro standardizaci, 04/(2021).

2. NTD ASI-II. Material characteristic for equipment and piping of VVER NPP, Praha, (2019).

3. P. G. Tipping. Understanding and Mitigating Ageing in Nuclear Power Plants - Materials and Operational Aspects of Plant Life Management (PLiM). Woodhead Publishing. 2010. ISBN 978-1-84569-511-8.

4. GOST 5632-2014. Alloyed stainless steels and alloys corrosion-resistant, heat resistant and heat-proof. Brand.

5. PN AEG–7-010-89. Equipment and pipelines of nuclear power units. Welding and alloying joints. Rules of control. Normative documents of Gosatomnadzor of Russia, (1990).

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