Selection and Design of Spring Foundation of Half Speed Turbine Generator for Ling’ao Phase Ⅱ NPP

Half-speed steam turbine generator for Ling’ao phase II nuclear power plant uses the spring vibration isolation foundation at first.From the type selection,design standards and vibration analysis and comparison with the measured data,the design process of spring foundation is elaborated.Exerting fully the advantages of the spring foundation,such as "low frequency",the earthquake-resistance and the adjustability,the safe operation of the half-speed steam turbine unit is ensured.