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Nuclear wastes are stored in large, underground carbon-steel storage tanks at the Hanford site. Carbon steels can become susceptible to localized corrosion. This paper presents the results of ongoing electrochemical investigations to understand the reasons behind the noble drift in the OCP of carbon steel in these waste simulants.
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Laboratory investigation performed to evaluate the impact of key Hanford tank waste chemical constituents on corrosion of Type 304L stainless steel (UNS S30403), which is the material of construction for the site’s evaporator.
Nuclear wastes are stored in large, underground carbon steel storage tanks. Carbon steels can be susceptible to localized corrosion (e.g., pitting) and stress corrosion cracking (SCC). This paper presents work done to evaluate changes in SCC susceptibility over time.
High-level radioactive waste generated during reprocessing of spent nuclear fuel at Hanford has been stored in several single- and 27 double shell tanks (DSTs). Each DST consists of a primary shell (inner) surrounded by secondary (outer) liner. The secondary liner rests on a concrete foundation. Rainwater may seep in and accumulate in the drain slots and may corrode the exterior of the secondary liner. Evidence of wall thinning has been detected via ultrasonic inspections of the annulus floor between the primary and secondary tank shells. Since the inspection is confined to this region, there is a concern that corrosion is widespread on the underside of the bottom plate.
High-level radioactive waste generated during reprocessing of spent nuclear fuel at Hanford has been stored in 149 single- and 27 double shell tanks (DSTs). Each DST consists of a primary shell (inner) surrounded by secondary (outer) shell. The secondary shell’s bottom rests on a concrete foundation.
The Effluent Treatment Facility (ETF) at the Hanford nuclear-waste storage facility is a waste treatmentfacility permitted under the Resource Conservation and Recovery Act of 1976 (RCRA). The facility removes radioactive and hazardous contaminants from various sources such as condensate wastewatergenerated by 242-A Evaporator campaigns, groundwater projects, solid waste disposal facilities, andother Hanford clean-up activities. The waste processed by the ETF is substantially more dilute than thewaste stored in the tanks.
The Hanford site contains approximately 55 million gallons (2.08 x 108 liters) of radioactive and chemically hazardous wastes arising from weapons production, beginning with World War II and continuing through he Cold War era. The wastes are stored in 177 carbon steel underground storage tanks, of which 149 are single-shell tanks (SSTs) and the remaining are double-shell tanks (DSTs). Historically, tank failures have been associated with the SSTs