The jet pump plug is an essential tool used in the maintenance of Boiling Water Reactors (BWRs) in nuclear power plants. The jet pump system involves driving water through a nozzle to create a high-velocity jet, which in turn induces a lower pressure that draws additional water along with it, effectively mixing and circulating the water. Jet pump […]
Preferred Invests in our Local Community
At Preferred Utilities in Danbury, Connecticut, we often talk about our products and services and how they make an impact on the environment, but we rarely speak about the impact our organization makes locally. We are so pleased with what we are able to contribute to our community and would like to share the good news. True to […]
Emergency Removal of a Main Steam Line Plug: A Case Study
Preferred Engineering has decades of experience in the nuclear industry with the Main Steam Line Plug, and sometimes unique situations arise that make our our expertise in installation and removal especially important. A recent project required us to employ an MSLP Emergency Removal tool during the installation process. One of the latch mechanisms on the plug jammed during […]
Fuel/Air Cross-Limiting
What is the Application? Steam supply and heating loads in a boiler plant vary throughout the course of the boiler firing cycle. In response to this, the boiler firing rate output % is continuously adjusting to maintain steam or temperature setpoint. This means that the boiler controller’s outputs (typically a fuel valve positioner, air damper positioner, and variable […]
Drum Level Control Essentials
What is the Application? As boilers convert water into steam to supply the plant’s load demand, more water must be supplied to the boiler to maintain the drum level at setpoint. In a modulating PID system, Boiler feedwater flow is controlled by the drum level controller by modulating a feedwater control valve which can be opened to give […]
Learning from Preferred’s Main Steam Line Plug Operating Experience
Preferred Engineering has extensive experience in the nuclear industry with the installation and removal of Main Steam Line Plugs. Over the years, we’ve developed a number of best practices that are key to maximizing efficiency and cutting critical path time. Here are some of the most important procedures we’ve established in recent MSLP projects: Camera Positioning Camera placement […]