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[en] As a result of the process of technological renovation of the heaters system and the power increase project, Almaraz Nuclear Power Plant has made several design changes in the feedwater heaters system. Within these changes, the old heaters control loops are replaced because the new power will increase the heaters drainage caudal. This modernization is carried out using the OVATION control system.
[en] During the last decade the Spanish PWR nuclear power plants designed by Westinghouse have planned and implemented the modernization of the non-1E Control systems. The driving forces behind the modernization of the original Control Systems are the management of the obsolescence of these systems and the implementation of functional improvements in the plants to increase the Control System reliability and availability. Westinghouse Ovation platform has been used in the modernization of the Reactor Control System, Turbine Control System, Plant Computer and Feedwater Heaters Level and MSR s Drains tanks Level control. Modernizations have been spread through the years in such a way that there is not impact on the outages and the different organizations on the customer and estinghouse can have dedicated teams to work in these projects. (Author)
[en] Improving the security of a plant's Distributed Control System (DCS) is an important consideration for plant safety and profitability, as well as the necessity to comply with the regulation. The U.S. Nuclear Regulatory Commission has produced Regulatory Guide (RG) 5.71, and the Nuclear Energy Institute (NEI) has produced NEI 08-09 to assist plants in meeting 10 CFR 73.54, Protection of digital computer and communication systems and networks. These requirements, which address the establishment, implementation and maintenance of a cyber security program, present challenges to ensure that safety, security and emergency preparedness functions of nuclear facilities are not negatively impacted by the vulnerability scanning and testing process.