Integrating Risk Analyses and Tools at the U.S. Department of Energy Hanford Site Page: 3 of 15
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WM'02 Conference, February 24-28, 2002, Tucson, AZ
human health and the environment. Most waste management facilities are located in either the 200-East or
200-West Area (Figure 1). The 200-East and 200-West Areas are both approximately 3.2 km (2 miles) across
and are approximately 4 km (2.5 miles) apart. The U.S Department of Energy, Richland Operations Office is
beginning the process of cleaning up contaminated facilities and past practice sites on the 200-Area Plateau.
The U.S Department of Energy, Office of River Protection is moving forward with retreival and treatment of
the 177 tank wastes and associated facilities, evaluating and mitigating the impacts of past tank leaks and
spills, and planning for tank farm closure. Both offices have plans to dispose of low-level mixed waste on the
plateau (Environmental Restoration Disposal Facility, low-level waste burial grounds, Immobilized Low
Activity Waste (from tank waste treatment). In addition there is a commercial low-level waste disposal facility
on the plateau.
Waste Receiving Elilueni
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Future gta lFacility (WE ) A Areas Effluent
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Support Complez (Future) Site T Tanks Dis s i BYTinks C Tanks AY Tanks
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Plutonium Finishing {TeuwFclt
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242-S Evaporalor /hrceraa Dan~fium afl
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SX Talrx WTWRS Effluent Disposal Facility (TEDF)
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Fig. 1. Waste Storage and Disposal Facilities in the 200 Areas. Source: PNNL-11800, Composite
Analysis for Low-Level Waste Disposal in the 200-Area Plateau of the Hanford Site
This paper will focus on tank-specific waste retreival and closure issues, but non-tank waste sites associated
with the 200-Area Central Plateau must be addressed in conjunction with tank issues to understand the overall
impact to human health and the environment. Liquid radioactive and chemical waste from nuclear materials
production and research were transferred to underground, reinforced-concrete, steel-lined tanks for storage.
Large volumes of liquid waste (346 billion gal) with lower radionuclide concentrations were also discharged to
the ground. The single-shell tanks currently contain 125,000,000 L (33,245,000 gal) of radioactive mixed
waste and the double-shell tanks currently contain 78,850,000 L (20,833,000 gal) of radioactive mixed waste.
The single-shell tank system includes 12 individual single-shell tank farms that contain 133 large volume tanks
(1.9 to 3.8 million L [500,000 to 1 million gal]); 16 smaller volume tanks (208,000 L [55,000 gal]); ancillary3
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Lober, R. W.; Yasek, R. M.; Morse, J. G.; Buck, J. W.; Henderson, C. C.; Sams, T. L. et al. Integrating Risk Analyses and Tools at the U.S. Department of Energy Hanford Site, article, February 26, 2002; Tucson, Arizona. (https://digital.library.unt.edu/ark:/67531/metadc781943/m1/3/: accessed May 8, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.