Protective barrier program: Test plan for plant community dynamics

Technical Report · Tue Jan 01 04:00:00 EST 1991

OSTI ID:5566290

Sackschewsky, M R ^[1]; Chatters, J C; Link, S O; Brandt, C A ^[2]

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1. Westinghouse Hanford Co., Richland, WA (United States)
2. Pacific Northwest Lab., Richland, WA (United States)

The Westinghouse Hanford Company (Westinghouse Hanford) and Pacific Northwest Laboratory (PNL) are jointly developing protective barriers for the long term isolation of low-level radioactive defense waste for the US Department of Energy (DOE) at the Arid Sites. Protective barriers have been identified as an integral part of the overall final disposal strategy for low-level defense waste at the Arid Sites (DOE 1987). At present, the conceptual design of the Arid Site protective barrier is a multilayer structure that will minimize waster infiltration into and through the underlying waste, and will prevent intrusion into the waste by plant roots, animals, and humans. This multilayer system consists of a fine soil layer overlying a coarse sand and/or gravel geo-filter overlying a layer of large cobbles or basalt riprap. Plants contribute several crucial functions to the overall performance of the protective barrier.Through transpiration, plants are capable of removing considerably more moisture from a given volume of soil than the physical process of evaporation alone. This becomes especially important after periods of excessive precipitation when the possibility of saturation of the textural break and leeching to the buried waste is increased. Plants also function in significantly reducing the amount of wind and water erosion that would be expected to occur on the barrier surface. In addition to these physical functions, plants also influence other biotic effects on barrier performance.

• Research Organization: Westinghouse Hanford Co., Richland, WA (United States)
• Sponsoring Organization: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: AC06-87RL10930
• OSTI ID: 5566290
• Report Number(s): WHC-EP-0380; ON: DE92008388
• Country of Publication: United States
• Language: English

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59 BASIC BIOLOGICAL SCIENCES
BIOINTRUSION
BUDGETS
CLIMATE MODELS
CLIMATES
CONTAINMENT
CONTAINMENT SYSTEMS
COST ESTIMATION
DESIGN
DRAINAGE
ENGINEERED SAFETY SYSTEMS
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EVAPORATION
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HAZARDS
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MATHEMATICAL MODELS
MOISTURE
NATIONAL ORGANIZATIONS
PERFORMANCE
PHASE TRANSFORMATIONS
PHENOLOGY
PLANTS
POPULATION DYNAMICS
RADIOACTIVE MATERIALS
RADIOACTIVE WASTE DISPOSAL
RADIOACTIVE WASTE MANAGEMENT
RADIOACTIVE WASTES
SAMPLING
STORAGE FACILITIES
TRANSPIRATION
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