Details

Autor(en) / Beteiligte

• TAKEUCHI, Masayuki
• TAKEDA, Seiichiro
• NAGAI, Takayuki
• KOIZUMI, Tsutomu

Titel

Effect of Chemical Species in Spent Nuclear Fuel Reprocessing Solution on Corrosion of Austenitic Stainless Steel

Ist Teil von

• Transactions of the Atomic Energy Society of Japan, 2005/03/25, Vol.4(1), pp.32-44

Ort / Verlag

Atomic Energy Society of Japan

Erscheinungsjahr

2005

Link zum Volltext

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• In this study, the corrosion behavior of stainless steel was investigated in consideration of characteristics of reprocessing solution for spent nuclear fuel. The effects of uranium, plutonium, fission products, corrosion products etc. on nitric acid corrosion of austenitic stainless steels were evaluated to understand the corrosion factors in the reprocessing solution and were electrochemically discussed. As results, the oxidizing ions such as Pu(VI), Ru(III) and Cr(VI) accelerated the corrosion of stainless steel in hot nitric acid solutions, however uranium effect was not significant. The effectivitity of the oxidizing ions on corrosion of stainless steel is related to the standard electrode potential (E0). Roughly, the oxidant of equilibrium reaction, which have E0 more than 1.0V vs NHE, are possible to accelerate the corrosion of stainless steel in nitric acid solution. The effectivity of oxidants, which have lower E0 in the range, on stainless steel corrosion was quite significant because they are stabler in hot nitric acid solutions.