Elemental distribution in a decommissioned high Ni and Mn reactor pressure vessel weld metal from a boiling water reactor
Journal article, 2023

In this paper, weld metal from unique material of a decommissioned boiling water reactor pressure vessel is investigated. The reactor was in operation for 23 effective full power years. The elemental distribution of Ni, Mn, Si and Cu in the material is analysed using atom probe tomography. There are no well-defined clusters of these elements in the weld metal. However, some clustering tendencies of Ni was found, and these are interpreted as a high number density of small features. Cu atoms were found to statistically be closer to Ni atoms than in a fully random solid solution. The impact of the non-random elemental distribution on mechanical properties is judged to be limited.

Elemental distribution

Atom probe tomography

Reactor pressure vessel

Irradiation damage

Boiling water reactor

Author

Kristina Lindgren

Chalmers, Physics, Microstructure Physics

P. Efsing

Royal Institute of Technology (KTH)

Vattenfall

Mattias Thuvander

Chalmers, Physics, Microstructure Physics

Nuclear Materials and Energy

23521791 (eISSN)

Vol. 36 101466

Subject Categories

Tribology

Metallurgy and Metallic Materials

DOI

10.1016/j.nme.2023.101466

More information

Latest update

7/18/2023