The paper discusses scientific challenges faced in the beginning and achievements made throughout the projects, including the industrial impact and lessons learned. | Reactor performance system reliability instrumentation and control EPJ Nuclear Sci. Technol. 6 43 2020 Nuclear Sciences A. Schumm et al. published by EDP Sciences 2020 amp Technologies https epjn 2019017 Available online at https REVIEW ARTICLE Reactor performance system reliability instrumentation and control Andreas Schumm1 Madalina Rabung2 Gregory Marque1 and Jary Hamalainen3 1 EDF Labs Les Renardières EDF R amp D Avenue des Renardières 77818 Moret sur Loing France 2 Fraunhofer IZFP Campus 66123 Saarbrücken Germany 3 VTT Technical Research Centre of Finland Vuorimiehentie 3 Espoo Finland Received 12 March 2019 Accepted 4 June 2019 Abstract. We present a cross-cutting review of three on-going Horizon 2020 projects ADVISE NOMAD TEAM CABLES and one already finished FP7 project HARMONICS which address the reliability of safety- relevant components and systems in nuclear power plants with a scope ranging from the pressure vessel and primary loop to safety-critical software systems and electrical cables. The paper discusses scientific challenges faced in the beginning and achievements made throughout the projects including the industrial impact and lessons learned. Two particular aspects highlighted concern the way the projects sought contact with end users and the balance between industrial and academic partners. The paper concludes with an outlook on follow-up issues related to the long term operation of nuclear power plants. 1 Introduction HARMONICS 5 the only project of the four already terminated extends this approach to the software of The effective maintenance of nuclear power plants is computer-based I amp C safety systems. essential for their safe operation. Maintenance ensures that This review is intended to be voluntarily cross-cutting the level of reliability and effectiveness of all safety- focusing on achievements challenges and impacts of these relevant components and systems remains in accordance projects rather than