The obtained floor response spectra (FRS) using the two studied direct spectra-tospectra methods (DSSM) and the time series method show an overall good agreement in shape and acceleration response at the peaks. The results also show that there is a significant scatter at the peaks between the individual FRS obtained from the time history analyses. These results highlight the importance of using several sets of acceleration time series followed by averaging of the results when using this method. However, the FRS obtained using either of the two DSSMs mainly fall within the scatter of the time-history based FRS.
Direct Spectra-to-Spectra Methods
News
New method for investigating concrete structures in nuclear power plants
Nuclear power, which accounts for about 30% of Sweden's electricity production, plays a crucial role in delivering fossil-free electricity. As many nuclear power plants are approaching the end of their planned lifetime, it is crucial to extend their operating periods to meet current and future needs. Markus Nilsson at Lund University has spent four years investigating how non-linear ultrasonic methods can be used to detect and assess corrosion in concrete-embedded containment liners in nuclear power plants. The work has resulted in a doctoral thesis.
"Lifetime extension of nuclear power needs more focus"
The Life After 60 – Long Term Operation of Nuclear Power conference, hosted by Energiforsk last week, was fully booked. The importance of lifetime extension, the need for competence, and why green politicians acknowledge the necessity of nuclear power were three key topics that resonated throughout the event.
Exploring vibrations in power plants with Professor Rainer Nordmann
Energiforsk and Professor Rainer Nordmann have arranged a one-day-lecture tour of Sweden and Finland on turbogenerator vibrations.
Pump course in the Netherlands strengthened the Nordic nuclear power competence
– I appreciate that we were given the opportunity via Energiforsk to design a course that suited our purposes and hope more colleagues will have the opportunity to take it, says Lena Skoglund.
About the report
2024:1030
Daniel Rydle, Martin Olofsson, Albin Bäckstrand Michele Godio, Gabriel Barslivo