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| NKS Programme Area: | NKS-R | | Research Area: | Plant life management and extension | | Report Number: | NKS-418 | | Report Title: | Barsebäck as a Research and Development Platform, Extraction and Analysis of Service-aged and Irradiated Reactor Pressure Vessel Material | | Activity Acronym: | BREDA-RPV | | Authors: | Pål Efsing, Magnus Boåsen, Ulla Ehrnstén, Sebastian Lindqvist, Mattias Thuvander, Kristina Lindgren, Jenny Roudén, | | Abstract: | As part of the NKS-R program, VTT, Chalmers University of Technology and KTH has performed a baseline study to analyze the as-aged material properties of the retired reactor pressure vessel, RPV, from Barsebäck unit 2. The current phase included the actual extraction of samples from the RPV of Barsebäck 2, formulation of a preliminary test matrix and continued work to set the scope for future R&D activities related to fracture mechanical testing and microstructural evaluation of aged low alloy steel typical of the operating nuclear power plants in the Nordic countries. Due to the nature of the work, the NKS-project is connected to a number of adjacent activities, including support from the Finnish Nuclear Safety Program, the SAFIR-program, the Swedish Radiation Safety Authority SSM and Swedish Centre for Nuclear Technology, SKC and Energiforsk.
In 2018, base-line microstructural work was finalized of using Light Optical, Scanning Electron and Transmission Electron methodologies to complement the previous high resolution Atom Probe Tomography work. Further the preparation of the mechanical testing of the retrieved samples have proceeded. A literature review of constraint effects on fracture mechanical testing and a suggested preliminary test matrix has also been presented.
Kristina Lindgren, Chalmers University of Technology successfully defended her Ph.D. thesis performed with-in the scope of the project in December 2018. | | Keywords: | Low alloy steel, irradiation effects, fracture toughness, ductile to brittle transition temperature, constraint effects, high resolution microscopy, microstructural characterization | | Publication date: | 06 Febr 2019 | | ISBN: | ISBN 978-87-7893-507-6 | | Number of downloads: | 1744 | | Download: |  NKS-418.pdf |
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