G - Physics – 21 – C
Patent
G - Physics
21
C
G21C 1/01 (2006.01) C23F 11/00 (2006.01) C23F 15/00 (2006.01) G21C 5/02 (2006.01) G21C 13/087 (2006.01) G21C 15/28 (2006.01) G21C 17/022 (2006.01) G21C 19/28 (2006.01)
Patent
CA 2145897
A method for mitigating initiation or propagation of a crack in a surface of a metal component in a water- cooled nuclear reactor or associated equipment. The method includes the step of injecting a solution or suspension of a pH-adjusting compound into the water of the reactor. The pH-adjusting compound is added in an amount such that the pH at the tip of the crack or at the point where said crack would otherwise be initiated is between about 6.5 and 8.0 (at temperature) indepen- dent of the electrochemical potential. The compound decomposes under reactor thermal conditions to release ions/atoms which adjust the pH of the water. The adjusted pH of the reactor water is in the range of 6.5 to 8Ø
Company General Electric
Wilson Craig
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