| 摘要 |
PROBLEM TO BE SOLVED: To suppress fluidization accelerated corrosion of a carbon steel constituting a pipe system, when injecting a reducing nitrogen compound into a water flowing pipe system of a nuclear power plant. SOLUTION: When the reducing nitrogen compound such as hydrazine 122 is injected into flowing water in carbon steel pipes 106, 110 in order to suppress stress corrosion crack of a structure material of a core 128 or the like of a nuclear reactor, an oxidizing agent such as oxygen 126 injected originally for suppressing the fluidization accelerated corrosion of the carbon steel is consumed by the hydrazine 122 or the like, to thereby generate the fluidization accelerated corrosion. As the countermeasure therefor, the oxidizing agent 127 of the quantity corresponding to the injection quantity of the reducing nitrogen compound such as hydrazine is injected into the pipes, and thereby the concentration of oxygen or the like in the pipes is maintained at a prescribed value, to thereby suppress the fluidization accelerated corrosion of the carbon steel. COPYRIGHT: (C)2006,JPO&NCIPI
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