51312-01094-Corrosion Monitoring Program at the Accelerated Retrieval Project Facilities

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Product Number: 51312-01094-SG

ISBN: 01094 2012 CP

Author: M. Kay Adler Flitton

Publication Date: 2012

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The 1995 Settlement Agreement with the State of Idaho stipulated removal of all transuranic waste from Idaho by 2018. As part of this agreement the Accelerated Retrieval Project began in 2004 to selectively remove buried waste contaminated with tranuranic radionuclides from various subsurface disposal pits located at the Radioactive Waste Management Complex at the Idaho National Laboratory. Targeted waste included sludges graphite filters and depleted uranium roaster oxide waste that are contaminated with transuranic radionuclides volatile organic compounds and depleted uranium. Within the first six months of operations in the second facility red corrosion product was noted on uncoated mild and stainless steel components within the facility and the associated transition ducts for the high efficiency particulate air filters had been penetrated (pitted through) due to gaseous hydrochloric acid high-chloride dust and condensate in the area. A wax-based coating was applied to the damaged filter transition ducts in April 2008 and a corrosion monitoring program was established to monitor corrosion of a few select facilities during waste excavation and post-excavation activities. This paper briefly describes the corrosion monitoring program and presents corrosion data from carbon and stainless steel coupons and electrical resistance corrosion probes placed within the monitored facilities.