Closed Circuit Rinsing

Closed Circuit Rinsing. Routing spent rinses into the process baths is very effective in preventing release of toxic materials they contain into the environment. Close circuit rinses are examined in detail in Section 8.2. 

Closed-circuit rinsing SR Kushner 1981, Tallmadge 1961 and 1967a, Meltzer 1989... 

Closed-circuit still rinse performance is dependent on the size of the still rinse relative to the square footage of parts surface that will be cleaned in it. Figure 8-4 depicts performances for three different bath sizes. In bath A, 27 cm2 of workpiece area is rinsed for every cm3 of bath. In bath C, the ratio is only 4.6 cm2/cm3 - i.e. less workpiece area is rinsed per cm3 of bath, and the resulting contaminant removal is higher, as illustrated in the figure. 

When the fluorination has been completed, stopcocks BS and RS are closed, and the entire manifold is evacuated and rinsed with dry air ten times and then retained under diminished pressure.7 The condenser of the fractionating column B is precooled to the boiling temperature of the most volatile reaction product. This is achieved by manually closing relay RP of an electronic control circuit. The control leads of this circuit are connected to manometer MS in such a way as to be actuated at the pressure desired for distillation. 

The relationship between increasing flow rate and decreasing short crack growth rate is consistent with the concept of flow-induced rinsing of the crack enclave. Assuming an aspect ratio of 10, a crack opening of 10 pm is indicated, which would seem to be a reasonable value. While the studies of Choi et al. [102] were carried out under some conditions that closely resemble those that exist in BWR primary circuits and in PWR secondary circuits, the flow rates and Reynolds numbers... 

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