ANSTO-SINAP Joint Research Centre
A team of experts have adapted two former electrochemistry rigs for testing of TMSR materials at elevated temperatures in fluoride and chloride molten salt systems.
Corrosion of materials within a molten salt environment is of major importance to a number of industries; of most relevance to this project is the nuclear industry.
The chemistry of the molten salt itself has a significant influence on the behaviour of the material being tested. A controlled atmosphere test cell environment has been developed, capable of testing a wide range of materials, in halide based molten salt systems, over a wide temperature range (up to 850°C).
The performance of materials, in a molten salt environment in-situ, is required to assess suitable candidature materials for future molten salt reactors.
In the short term, most of this work will be conducted using ion beam facilities and our own in-house plasma irradiator at ANSTO, with some in situ experiments being conducted at the ANU and overseas.
A small suite of samples are also being irradiated in OPAL and will be examined later, once sufficient neutron dose has been obtained.
This aspect of the JRC involves analysis of the defects produced in TMSR materials by radiation damage and the potential effects on important properties that relate to the materials application.
There is currently a strong interest in quantifying the residual stresses in welds used in nuclear and conventional power stations; some of which have been in operation for more than two decades.
In most cases it is impractical to perform residual stress measurements for every single weld in a structure or assembly. Additionally, the dimensions of real structural components are typically large and usually inaccessible, hence non-destructive neutron and X-ray methods cannot be employed.
In such cases validated numerical methods may be the only method available for reliable determination of residual stress.
The aim of numerical weld simulations is to develop models that are usable for control and design of welding processes. The results obtained allow prediction of appropriate mechanical performance of the welded component. However, reliable prediction and validation of residual stresses in a weld structure remains, a difficult task because of the complexity of the welding process (Fig. 3).
- Gilles, P., El-Ahmar, W., Jullien, J.F., 2009. Robustness analyses of numerical simulation of fusion welding NeT – TG1 application: single weld-bead-on-plate. International Journal of Pressure Vessels and Piping 86, 3–12.
- Muránsky, O., Smith, M.C., Bendeich, P.J., Holden, T.M., Luzin, V., Martins, R.V., Edwards, L., 2012. Compehensive numerical analysis of a three-pass bead-in-slot weld and its critical validation using neutron and synchrotron diffraction residual stress measurements. International Journal of Solids and Structures 49, 1045-1062.
This Project has been supported by the Commonwealth of Australia under the Australian-China Science and Research Fund