In order to proceed the decommissioning of the FuNushima Daiichi Nuclear Power Plant safely, it is important to maintain integrity of cooling system for fuel debris and spent fuels. Most part of the piping systems are made of carbon steel. This study has been done to understand rate-determining processes of carbon steel corrosion under current and future FuNushima Daiichi NPP conditions as functions of flow conditions and dissolved oxygen level by using electrochemical tests with rotating cylindrical ...
英字タイトル:
Corrosion behavior of carbon steels under flow and its rate-determining processes 渡邉 豊 YutaNa WATANABE Member

Corrosion rate of carbon steel SS400 was investigated in test solution (NaClaq, Cl-:200ppm) with a rotating cylinder electrode system. Polarization resistance measurement was used to determine variation of corrosion rate with time and specimens surface were observed after the measurements. Under aerated condition (dissolved oxygen: 7.3ppm), the corrosion rate increased with increasing rotating speed in low rotation speed ranges , but the corrosion rate decreased in high rotating speed ranges. The reas...
英字タイトル:
Evaluation of corrosion of cooling system piping of Fukushima Daiichi NPP