Analysis of Grounding and Shielding Plan for Nuclear Power Plant Instrumentation and Control Equipments

The instrumentation and control( IC) equipments grounding and shielding methods and implementation in domestic 3rd-generation nuclear power plant( NPP) project are reviewed first. Compared to traditional IC grounding methods, the shielded circuit grounded at both ends design is described in detail. Finally, a general grounding and shielding solution for IC equipments that will be applied for the new nuclear power plant projects is proposed.