Parallel full-scale reactors

In parallel, an experimental procedure has to be run in the pilot plant to produce a set of experimental conditions to be met by the full-scale reactor. The criteria for the scale-up for MSSR will be discussed later. 

Collins et al. (1971) carried out an experimental program to investigate parallel-channel instability in a full-scale simulated nuclear reactor channel op-... 

Particle Size and Desorption Rates. Bench-scale reactor studies of the desorption of toluene from single, 2- to 6-mm porous clay partides (14) showed desorption times that increased with the square of the particle radius, suggesting that diffusion controls the rate desorption. Parallel experiments performed in a small, pilot-scale rotary kiln at 300°C showed no effect of day partide size for diameters ranging from 0.4 to 7 mm. Additional single-partide studies with temperature profiles controlled to match those in the pilot-scale kiln had desorption times that were a factor of 2—3 shorter for the range of sizes studied (15). Hence, at the conditions examined, intrapartide mass transfer controlled the rate of desorption when single particles were involved and interpartide mass transfer controlled in a bed of particles in a rotary kiln. These results apply to full-scale kilns. As particle size is increased, intraparticle resistances to heat and mass transfer eventually begin to dominate. 

There is one point which is most important for the development of lead cooled reactors. When carrying out studies on the models of lead-bismuth cooled reactor flow path (including full-scale model), it was found that in parallel with the toroidal eddies appearing at the core diagrid inlet, sufficiently stable horizontal eddies may arise near the bottom of the... 

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