Fortum's Loviisa nuclear power plant gets digital I&C update

摘要

Working under a contract awarded in October 2014, the upgrading of part of the safety-critical instrumentation and control systems at the Loviisa plant, located in Finland on the shores of the Baltic Sea, was completed during planned outages between 2016 and 2018. The Loviisa plant's two Russian-designed VVER-440 reactors have been operating since 1977 (Unit 1) and 1980 (Unit 2). Both units' I&C systems were based on Siemens technologies-Simatic and Teleperm-for normal operation and safety-related systems, and Russian technology for reactor trip, rod control, and neutron flux monitoring. For the modernization project, called ELSA, Rolls-Royce's objectives were to update the reactor protection, control, and power limitation systems and the accident management systems to a standard that would sustain the plants throughout their operating lives. Rolls-Royce based the solution on its Spinline digital safety platform and supplied a hardwired backup system for accident management, monitoring, and normal control systems based on third-party programmable logic controllers.