Research On The Effects Of Flow Accelerate Corrosion And Its Countermeasures On Secondary Loop Material In Nuclear Power Stations

The serious accident happened in mihama 3,a nuclear power station in Japan. This make people remind of the similar several occurrence for carbon steel pipe break in PWR, in 80/90's 20 centuries. These also make International Atomic Energy Agency valued very much to the problem of Flow-accelerated corrosion (FAC). Several nuclear power station in domestic, QINSHANâ… , DAYA BAY etc, have been operated for more than a decade. The FAC problem would more outstanding in future. There are more than 30 reactors to be construct till 2020. Therefore, for guarantee that power station safety, the study on the formation mechanism of FAC and the affects factor not only is very important to operating nuclear power station, and to being designed or constructed nuclear power station in china also have reference to be worth.This paper discusses and studies the characteristic of FAC, the contact of FAC and metals corrosion; distinguish of FAC and metals corrosion, the formation mechanism of FAC. systemic studies main factor of the influence to the FAC, such as, The influence of the fluid dynamics, the water pH value, temperature, redox-reduction potential, dissolved oxygen, flow rate, the material, etc.Based on the research of FAC mechanism, influence factors and characteristics of QINSHANâ…¢. The countermeasure to repress secondary loop material FAC has been put forward. In order to prevent from similar serious trouble of FAC of the MIHAMA nuclear power station by the root, this paper put forward building up secondary loop material FAC aging management system, and introduced and discussed how to set up and carry out.