一、核动力工程需要的核数据核动力工程的物理设计、安全运行和燃料循环等都需要大量的精度较高的核数据。实际上,核数据是核动力工程的基础性信息,是反应堆物理设计等的基本依据和出发点。裂变堆的物理设计对核数据特別是中子数据提出了大量和苛刻的要求。堆物理计算(如有效增殖系数 keff,临界质量和反应堆中子能谱的计算)都是以核数据作为基本参数输入的。一般来说,对于所有的反应堆材料,反应堆中子能谱覆盖的整个能 I. Nuclear Data Needed for Nuclear Power Engineering The physical design, safe operation and fuel cycle of nuclear power engineering require a large amount of nuclear data with high accuracy. In fact, nuclear data are the basic information of nuclear power engineering and the basic basis and starting point of reactor physical design. The physical design of fission reactors poses numerous and demanding requirements for nuclear data, particularly neutron data. Physical calculations (such as effective multiplication keff, critical mass, and neutron energy spectrum of the reactor) are all based on nuclear data as a basic parameter. In general, for all reactor materials, the neutron energy spectrum of the reactor covers the entire energy