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Electrical and Thermomechanical Co-Simulation Platform for NPP
Authors
Poria Hasanpor Divshali
Seppo Hänninen
+3 more
Pasi Laakso
Matti Lehtonen
Robert John Millar
Publication date
10 February 2021
Publisher
'MDPI AG'
Doi
Cite
Abstract
Publisher Copyright: © 2021 by the authors. Licensee MDPI, Basel, Switzerland.In order to analyze the safety of nuclear power plants (NPP), interactions between ther-momechanical and automation processes, the on-site electrical grid, and the off-site transmission system should be studied in detail. However, an initial survey of simulation tools used for the modelling and simulation of NPP shows that existing simulation tools have some drawbacks in properly simulating the aforementioned interactions. In fact, they simulate detailed electrical power systems and thermomechanical systems but neglect the detailed interactions of the electrical system with thermomechanical and automation processes. To address this challenge, this paper devel-ops an open-source co-simulation platform which connects Apros, a proprietary simulator of the thermomechanical and automation processes in NPP, to power system simulators. The proposed platform provides an opportunity to simulate both the electrical and thermomechanical systems of an NPP simultaneously, and study the interactions between them without neglecting any details. This detailed analysis can identify critical faults more accurately, and provides better support for probabilistic risk analyses (PRA) of NPP. To investigate the effectiveness of the proposed platform, detailed thermomechanical and electrical models of an NPP, located in Finland, are cosimulated. The preliminary results emphasize that neglecting the detailed interactions between domains of NPP may lead to inaccurate simulation results and may affect NPP safety.Peer reviewe
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