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on 4/24/26 at 5:37 PM
The 2014 NEA workshop on the Robustness of Electrical Systems of Nuclear Power Plants in Light of the Fukushima Daiichi Accident (ROBELSYS) identified that the OPC phenomenon affected several nuclear power plants around the world. However, there was little common understanding of the effects or how to detect and manage the issue. Participants in this workshop, including a number of active members of the NEA Working Group on the Safety of Electrical Systems (WGELEC), collaborated with the IAEA to develop the IAEA Safety Report Series No. 91 entitled “Impact of Open Phase Conditions on Electrical Power Systems of Nuclear Power Plants” (NEA, 2016a).
The establishment of the NEA’s WGELEC coincided with the drafting of the IAEA Safety Report Series No. 91 (SRS-91), when methods for detecting OPCs were still under development. While SRS-91 identified some early possible solutions, there was little experience with their deployment or use and therefore it was too early to provide any definitive advice on suitable solutions.
