METHOD OF IDENTIFYING DAMAGED HEAT EXCHANGER TUBE IN DOUBLE HEAT EXCHANGER TUBE TYPE STEAM GENERATOR

METHOD OF IDENTIFYING DAMAGED HEAT EXCHANGER TUBE IN DOUBLE HEAT EXCHANGER TUBE TYPE STEAM GENERATOR

PROBLEM TO BE SOLVED: To positively identify a damaged double heat exchanger tube with simple constitution by reproducing leakage, caused by damage, using helium. SOLUTION: In this method, helium 20 is pressure-fed to a helium plenum 18 formed between an inner-tube tube plate 16 connected to each in...

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Bibliographische Detailangaben
1. Verfasser: WATABE ICHIRO
Format: Patent
Sprache:eng
Schlagworte:
MEASURING
NUCLEAR ENGINEERING
NUCLEAR PHYSICS
NUCLEAR REACTORS
PHYSICS
TESTING
TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES
TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR
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Zusammenfassung:PROBLEM TO BE SOLVED: To positively identify a damaged double heat exchanger tube with simple constitution by reproducing leakage, caused by damage, using helium. SOLUTION: In this method, helium 20 is pressure-fed to a helium plenum 18 formed between an inner-tube tube plate 16 connected to each inner tube 13a and an outer-tube tube plate 17 connected to each outer tube 13b in a double heat exchanger tube 13 forming a helical coil inside a body drum and connected to a feed water inlet 11 and a steam outlet 9. Sound collector 40 is inserted in regular order into the inner tubes 13a and blowing sound of helium from the damaged double heat exchanger tube 13 is detected by the sound collector 40 to identify the damaged double heat exchanger tube 13.