The dynamic behavior of a sodium system cold trap was numerically simulated on a digital computer. The simulation accounted for mixing in the hold tank, delay times in pipes, temperature variation with distance in the cold trap, impurity buildup on the walls of the cold trap, and simultaneous precipitation and dissolution of the impurity in different portions of the cold trap. The main purpose of the simulation was to generate mass transfer coefficients from experimental data taken from an experimental sodium loop. The program can also help in the design of sodium systems containing cold traps.
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