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Title: Determination of Erosion/Corrosion Rates in Hanford Tank Farms Radioactive Waste Transfer System Pipelines

The twenty-eight double-shell underground radioactive waste storage tanks at the U. S. Department of Energy’s Hanford Site near Richland, WA are interconnected by the Waste Transfer System network of buried steel encased pipelines and pipe jumpers in below-grade pits. The pipeline material is stainless steel or carbon steel in 51 mm to 152 mm (2 in. to 6 in.) sizes. The pipelines carry slurries ranging up to 20 volume percent solids and supernatants with less than one volume percent solids at velocities necessary to prevent settling. The pipelines, installed between 1976 and 2011, were originally intended to last until the 2028 completion of the double-shell tank storage mission. The mission has been subsequently extended. In 2010 the Tank Operating Contractor began a systematic evaluation of the Waste Transfer System pipeline conditions applying guidelines from API 579-1/ASME FFS-1 (2007), Fitness-For-Service. Between 2010 and 2014 Fitness-for-Service examinations of the Waste Transfer System pipeline materials, sizes, and components were completed. In parallel, waste throughput histories were prepared allowing side-by-side pipeline wall thinning rate comparisons between carbon and stainless steel, slurries and supernatants and throughput volumes. The work showed that for transfer volumes up to 6.1E+05 m3 (161 million gallons), the highest throughput ofmore » any pipeline segment examined, there has been no detectable wall thinning in either stainless or carbon steel pipeline material regardless of waste fluid characteristics or throughput. The paper describes the field and laboratory evaluation methods used for the Fitness-for-Service examinations, the results of the examinations, and the data reduction methodologies used to support Hanford Waste Transfer System pipeline wall thinning conclusions.« less
Authors:
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Publication Date:
OSTI Identifier:
1227223
Report Number(s):
TOC-PRES--15-3560-FP-Rev.0
TRN: US1601922
DOE Contract Number:
AC27-08RV14800
Resource Type:
Conference
Resource Relation:
Conference: Waste Management Symposia 2016 (WM2016), Phoenix, AZ (United States), 6-10 Mar 2016
Research Org:
Hanford Site (HNF), Richland, WA (United States)
Sponsoring Org:
USDOE Office of Environmental Management (EM)
Contributing Orgs:
AEM Consulting LLC (United States); Washington River Protection Solutions, Richland, WA (United States); USDOE Office River Protection, Richland, WA (United States)
Country of Publication:
United States
Language:
English
Subject:
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; HANFORD RESERVATION; STAINLESS STEELS; CARBON STEELS; RADIOACTIVE WASTES; RADIOACTIVE WASTE STORAGE; COMPARATIVE EVALUATIONS; TANKS; PIPELINES; STORAGE FACILITIES; SLURRIES; CORROSION; WALLS; EROSION; UNDERGROUND STORAGE; SERVICE LIFE; RADIOACTIVE WASTE FACILITIES