The document discusses seismic analysis methods for nuclear assets according to Russian methodology. It describes analyzing structural response to seismic loads using time history and response spectrum methods. The Russian approach models systems as spatial structures and uses SRSS and CQC methods to combine modal responses. Pipelines are modeled as 3D rod systems and damping is assumed to be 2% of critical. The methodology is similar to American approaches but with some differences like a lower cut-off frequency for static analysis.