January-February 2019 NPJ

Nuclear Plant Journal, January-February 2019 NuclearPlantJournal.com 41 gripper temperature. The system also includes advanced maintenance modes for troubleshooting and testing, with the ability to exercise all signals and system logic/software without motor- generator set power and loads if testing is required during an outage prior to motor- generator set or load availability. The Ovation displays can be tailored to each plant operator’s needs and plant-specific Human Factored Engineering programs. Ethernet communication accommodates operators’ use of soft controls to make setpoint modifications for alarms, timing, current level and other system parameters that were not adjustable previously. Operators can also coordinate single rod motion using soft controls, which allows the existing control room lift disconnect switches in Westinghouse plants to be removed or abandoned in place. Current Profile Capture ARCH captures current profiles – coil traces – for every step the system takes, capturing, monitoring and saving them by transmitting them to a computer from which they are archived in a database. Operators can access the database with the Westinghouse Current Profile Viewer tool. This arrangement simplifies the entire troubleshooting experience since the actual trace or misstep that caused the alarm can be accessed and viewed on demand. Operators retrieve the traces by group/subgroup, date and time. They will no longer need to attempt to recreate the condition with a recorder attached, which may be difficult for intermittent error conditions and can delay the operator’s ability to correct the problem. The archived profile data can also be used for future predictive analysis of control rod drive mechanism operation. Installation Since the Westinghouse ARCH is designed to provide utilities with a simpler path to digital rod control with minimal impact to outage schedules, Current Profile Viewer captures current profiles in real time for ease in troubleshooting. many considerations to this effect are designed into the components. In addition to reusing existing cabinets, electronics and cabling, panels are pre-wired and pre-assembled. Its modularity not only allows features to be added during several outages as needed to expand the digital footprint and benefits of digital control, it eases steps for any installation process. ARCH will be installed in two units at the end of 2019, beginning of 2020. ARCH software and electronics incorporate operating experience from the operating units and lessons learned from Westinghouse Digital Rod Control System installations. The ARCH installations will also benefit from this experience. Contact: Donna Ruff, Westinghouse Electric Company, telephone: (412) 374- 4705, email: ruffdl@westinghouse.com . http://digitaleditions.nuclearplantjournal.com