The Spent Fuel-handling Machine moves fuel assemblies between the Transfer System, the spent fuel pool and the New Fuel Elevator. The Spent Fuel-handling Machine consists of a bridge and trolley structure, hoist, (occasionally a rigid mast) and often an auxiliary hoist. The machine is PLC and computer-controlled with an ergonomic touch-screen interface. The equipment’s robust design maximizes the overall safety and reliability of fuel handling and facilitates the efficient movement of fuel.
Safety
- Boundary zone checking verifies the machine operates within established boundaries
- Interlocks interact with other elements of the Fuel-handling System to ensure the correct sequential process
- Speed control allows for higher speeds where possible and slower speeds where necessary
- Load weighing system prevents snagged grid straps, poor grapple engagement and load hang-ups by detecting overload and underload conditions
- Data logging of system moves enables post outage review of machine operation
- Software logs record unexpected events and generate real-time error messages on-screen
- Compatible with ShuffleWorks, CaskWorks files, or user generated ASCII format
Reliability
- Use of proven components ensures that the equipment can perform in the given environment
- Redundancy of components permits continuation of operation and extension of uptime in the event of a single-component failure
Efficiency
- FuelNet™ Controls
- Operation of equipment in automatic, semi-automatic and manual modes allows for appropriate operational mode for a given move
- Automatic controls optimize fuel movement rate
- Simultaneous axis movement in automatic mode shortens travel path
- Fuel sequencing database file generates moves with minimal operator intervention
- Faster bridge and trolley speeds allow fuel to be moved quickly from point to point
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