Significance Determination on Operating Event of Broken Shaft of RCV Pump for Nuclear Power Plant

The method of the significance determination process (SDP) and its implementation used by Nuclear Regulatory Commission of America were introduced in this paper. And the At-Power SDP method was developed based on this method. An operating event of broken shaft of RCV pump for nuclear power plant (NPP) was analyzed by using the At-Power SDP method. It proves that SDP method is of significance for enhancing the nuclear safety regulatory efficiency and the safety management of NPPs.