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Supercritical Water Reactor: Particle Size
In a Supercritical Water Reactor (SCWR), the size of particles—whether they are impurities, corrosion products , or fuel fragments—can play a critical role in the reactor's performance and safety. Here's how particle size is relevant in different contexts within an SCWR: 1. Fuel Pellet Manufacturing In the context of fuel pellets, particle size affects the sintering behavior, density, and thermal conductivity of the fuel. Uranium dioxide (UO₂) fuel pellets used in SCWRs require specific particle size distributions to ensure uniform sintering and avoid defects. Smaller particles result in better sintering but can lead to higher reactivity and thermal conductivity issues. 2. Corrosion Products and Impurities Particle Size in Coolant: Corrosion products or impurities can form particles within the coolant. The particle size distribution can affect how easily these particles are transported or deposited on surfaces such as fuel cladding. Larger particles are more likely to settle a...
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