| 摘要 |
PROBLEM TO BE SOLVED: To provide an anticorrosion method and anticorrosion system of an instrument material in a nuclear reactor capable of suppressing a stress corrosion crack by estimating the time at which the effectiveness of online injection of a noble metal is lost in a rating operation period of the nuclear reactor.SOLUTION: An anticorrosion system 1 includes: a hydrogen injection device 4 for injecting hydrogen into a water supply pipe 6; a noble metal injection device 5 for injecting a noble metal into the water supply pipe 6; two or more electrodes 2 that are disposed in a branch pipe 7 so as to be dipped into a nuclear reactor coolant and are made of the same type of material as that of the nuclear reactor configuration material; and an electrochemical noise measuring apparatus 3. The electrochemical noise measuring apparatus 3 measures the electrochemical noise between the electrodes, estimates the adhesion amount of the noble metal remaining on surfaces of the electrodes 2, detects the time at which the noble metal is added to the water supply pipe 6, and controls the noble metal injection device 5 so that the noble metal is injected into the water supply pipe 6.SELECTED DRAWING: Figure 1 |
