Method and structure for repairing an elongated metal hollow member
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Nov 30, 1993
Grant Date -
N/A
app pub date -
Jan 9, 1991
filing date -
Jan 12, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A part of an ICM housing including a portion to be repaired, welded to a wall of a reactor pressure vessel in operation, is cut and removed and a new ICM housing half is welded to the remaining part of the ICM housing to form a new ICM housing. The new ICM housing is provided at the welding portion thereof with a molten metal layer containing 4 wt % or more .delta. ferrite. A sleeve made of stainless steel is located at the welding portion of an inner peripheral surface of the new ICM housing made so as to be molten by a TIG welding machine to form the molten metal layer, with the molten metal layer preventing stress corrosion cracking of the new ICM housing.
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