corrosion in acidic solutions. Tank 8D-2, which contains the alkaline PUREX waste, is made of carbon steel. Corrosion aspects of the carbon steel tanks were reviewed previously (Cragnolino, 1993). Initial activities that were completed in November 1990 included removal of radioactive Cs from the liquid present as a supernatant above the PUREX CORROSION EXPERIENCE IN CALCINATION OF LIQUID years of extensive corrosion studies and pilot-plant experience, became opera-tional in 1963. Since that time approximately "13,337,137 litres (3,523,375 gallons) of liquid nuclear wastes, generated during the reprocessing of spent nuclear fuel materials, have been reduced to dry granular solids. The volume reduction, about seven or eight gallons of liquid waste to one gallon of dry
Corrosion test coupons removed from the high level liquid waste (HLLW) tanks at the Idaho chemical Processing Plant (ICPP) during a 1987-1988 coupon recovery operation have been evaluated. The data indicate that the fluoride containing first cycle raffinates are the most corrosive solutions with an average general corrosion rate of 2.9 /times/ 10/sup /minus/2/ mil per year. POTENTIAL FOR STRESS CORROSION CRACKING OF A537 Apr 26, 2010 · The Type IV tanks for this waste do not have cooling coils and have not undergone heat treatment to stress-relieve the tanks. After the waste is concentrated by evaporation, it becomes very alkaline and can cause stress corrosion cracking (SCC) and pitting corrosion of the tank materials. Seminar:Safe Storage of Radioactive Wastes in the Hanford The wastes are generally highly alkaline, from pH 10 to hydroxide concentrations in excess of 6 M. The steel is passive in these environments, but is susceptible to localized corrosion and stress corrosion cracking because of the generally high nitrate concentrations and elevated temperatures.
Management of a tank farm for liquid radioactive wastes requires careful planning several years ahead. The technology for safe storage of high-level liquid waste in tanks over periods of many years have been demonstrated in several countries. Some leakage has occurred from tanks in the USA. This, however, was from mild steel tanks of early design.Corrosion of steel in simulated nuclear waste solutions Dec 01, 1993 · OSTI.GOV Conference:Corrosion of steel in simulated nuclear waste solutions. Corrosion of steel in simulated nuclear waste solutions