Abstract:

Electrical equipment installation is generally categorized into bolt connections and welding.In order to verify the influence of the two installation methods on the seismic performance, two identical battery cabinets are fixed on the vibration table with various installation methods for seismic test.The test results show that the acceleration response of the welded cabinet is greater than that of the bolted cabinet, with higher resonance frequency, smaller displacement of the cabinet, larger overall stiffness, and greater stress of the welding part.However, bolted cabinets are prone to fastening failure of bottom beams, large battery and cabinet deformation and high stress due to torque.To improve the seismic performance of cabinets,the necessary measures need to be taken to reduce the cabinet deformation and collisions between batteries and cabinets.It is recommended to install battery cabinets with large mass and high center of gravity in full welding approach to reduce the impact of geometric deformation on the seismic performance of battery cabinets.

Key words: nuclear power plant, battery cabinet, response spectrum, seismic waves, seismic capability assessment