Vertically-Mounted, High-Pressure Feedwater Heater Replacements Day & Zimmermann Day & Zimmermann used its technical expertise, welding and rigging partnerships, and managed-task approach to save one nuclear customer more than $2 million on two vertically-mounted, high-pressure feedwater heater (FWH) replacements. The project was completed on time without any first aid incidents or OSHA recordables. The project team engaged with the site approximately eight months prior to the outage, allowing time to identify issues and drive resolution without impacting the schedule. D&Z and its partners implemented a rigging solution to remove the old FWHs from a confined space and install the new FWHs with insulation intact. The team also designed a comprehensive mock-up of the 24-inch nozzle that all

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