基于功率密度谱的压水堆核电厂中子噪声特性研究

分析了压水堆核电厂中子噪声功率密度谱的计算方法,利用该方法以核电厂堆内构件振动监测系统长期的监测数据为基础,计算了中子噪声的功率密度谱,分别分析了百万千万级核电厂、不同功率核电厂和不同燃料周期核电厂中子噪声功率密度谱特性。结果表明,通过分析压水堆核电厂的中子噪声功率密度谱特性,能有效的认识压水堆核电厂堆内构件的振动行为,为压水堆核电厂堆内构件状态分析提供了基础。 

Study on Neutron Noise Characteristics of PWR Nuclear Power Plants Based on Power Density Spectrum

The calculation method of neutron noise power density spectrum for PWR nuclear power plants is analyzed. By using this method, the power density spectrum of noise neutron is calculated on the basis of long-term internal vibration monitoring system in nuclear power plants. Therefore, the power density spectrum characteristics of noise neutron for PWR nuclear power plants of million kilowatt is analyzed with different power and different fuel cycles. The results show that it can recognize the internal vibration behavior of PWR nuclear power plants through the analysis of power density spectrum characteristics, which can provide a basis for internal state analysis of PWR nuclear plants.