Method for welding of end plug of control rod
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United States of America Patent
Stats
-
Mar 28, 1995
Grant Date -
N/A
app pub date -
Nov 19, 1993
filing date -
Nov 20, 1992
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method is disclosed for welding an end plug to an open end of a surface-coated tube in order to provide a control rod. First, the end plug is brought into pressed abutment with the open end of the surface-coated tube. Then, resistance welding is performed in order to join the end plug with the open end of the surface-coated tube by applying electric current between the surface-coated tube and the end plug to heat the same while keeping the end plug pressed in abutment with the open end of the surface-coated tube. With these procedures, even when a surface-coated tube having a hard coating formed over its entire length is employed, the coating material is prevented from dissolving into the welded portion and therefore ensures an excellent welding quality, and the resulting control rod exhibits excellent characteristics over its entire length.
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