Helium leakage dating

If major tube sheet blockage occurs, the condenser vacuum can be significantly degraded.Regardless of the tube material, the most effective way to ensure that tubes achieve their full life expectancy and heat transfer efficiency is to keep them clean.Both categories of leaks are likely to occur at some point, and a correction strategy can be prepared.

The last three categories of problems, concerning water or air in-leakage, tend to occur randomly.Design flow through condenser tubes is often 7 to 10 ft/s, but this is an average (bulk flow), and some tubes may experience much lower flow than others.This can be a problem if the waterbox is not full and upper tubes receive intermittent flow.Condenser tube fouling, which is mostly a tube interior concern, generally falls into one of the following five categories. Microbiological fouling routinely occurs in natural waters, as many bacterial species will naturally colonize and grow on inert substrates.The temperature at the interior wall of condenser tubes is ideal for growth of some bacteria.

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