Optimization,structural deterministic and probabilistic safety analyses of a 3D innovative seismic base isolation system
A majority of new build Nuclear Power Plants(NPPs)are located in high seismicity zones with Peak Ground Acceleration(PGA)design levels of more than 0.3g with return earthquake period of 10000 years.Taking into account new requirements of the International Atomic Energy Agency(IAEA)and National nuclear authorities for NPPs nuclear safety,as well as public pressure and experience gained from accidents at Kashiwazaki and Fukushima NPPs subjected to strong earthquake motions,it is necessary now to prove NPPs seismic capacity at an increased intensity of seismic motion by factors 1.4-1.67 to the standard design level.Thus,the requirements for a seismic stability of NNPs increase in some cases to 0.5-0.8g PGA values now.A construction of NPPs for such intensive seismic impacts with usual rigid supporting of the safety related buildings and structures leads to an essential increase-up to 20%of the NPPs total cost,and also makes questionable the possibility to achieve the specified nuclear safety limits in a core damage frequency(CDF).An alternative approach is to use seismic isolation systems(SIS)for the safety related buildings that makes possible a dramatic decrease in seismic response of structures and their safety upgrading.This paper is devoted to a design of the 3D seismic isolation system based on the optimization modeling a structural seismic response in all three spatial directions.The key problems of the optimal SIS influence on nuclear and seismic safety and its possible cost benefits are also under consideration in the paper.
Seismic isolation optimization deterministic probabilistic analysis
国际会议
The 7th World Conference on Structural Control and Monitoring(7WCSCM)(第七届结构控制与监测世界大会)
青岛
英文
960-969
2018-07-22（万方平台首次上网日期，不代表论文的发表时间）