System parameter identification for reactor building using forced vibration test and earthquake records

To verify the seismic design procedure for BWR-type reactor buildings, a forced vibration test was performed after a plant was constructed. Furthermore, several earthquake records have been obtained from the installed earthquake observation network. This paper describes a newly developed system parameter identification method applied to both the vibration test results and the observed earthquake records. The soil-structure interaction effect and the rigidity and damping of the reactor building were successfully identified and the validity of the seismic design model and its evaluation method were confirmed. (author)