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Method of detecting through-wall crack and measuring through-wall length of crack in nuclear steam generator tube
Method of detecting through-wall crack and measuring through-wall length of crack in nuclear steam generator tube
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机译:核蒸汽发生器管中通孔裂缝的检测和通孔裂缝的测量方法
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摘要
Disclosed herein is a method of detecting a through-wall crack and measuring the through-wall length of the crack in a steam generator tube of a nuclear power plant. The method of the present invention is characterized in that the through-wall crack is detected and the through-wall length of the crack is measured in such a way that there are measured the number and positions of inflection points of a graph that is plotted by relating characteristic amplitude values of eddy current signals, which are generated whenever a coil of a motorized rotating probe passes the crack while being spirally rotated, to the positions in the length of the crack.
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