Method of pressure pulse cleaning heat exchanger tubes, upper tube support plates and other areas in a nuclear steam generator and other tube bundle heat exchangers
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United States of America Patent
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Oct 13, 1987
Grant Date -
N/A
app pub date -
Dec 26, 1984
filing date -
Dec 26, 1984
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention relates to an improved method of cleaning a nuclear steam generator by removing the buildup of deposits which accumulate on the upper tube support plates, on the heat exchanger tubes, on flow holes in the support plates and between the support plates and heat exchanger tubes, and on other secondary side surfaces of a heat exchanger vessel through utilization of a repetitive shock wave induced in the deposits. The shock wave serves to effectively and safely loosen the products of corrosion and other elements which settle on these surfaces of the heat exchanger vessel and thereby facilitiates their easy removal through flushing and vacuuming the vessel. The shock waves are induced by air-gun type pressure pulse shock wave sources or pressurized gas-type pressure pulse shock wave sources.
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