T-TY Tank Farm Interim Surface Barrier Demonstration - Vadose Zone Monitoring FY10 Report

Zhang, Z. F.¹  Strickland, Christopher E.¹  Field, Jim G.² 

[1] Pacific Northwest National Lab. (PNNL), Richland, WA (United States);Washington River Protection Solutions, Inc., Richland, W

关键词: CONSTRUCTION;    DEPTH;    DRAINAGE;    ELECTRIC POTENTIAL;    GROUND WATER;    HEAD;    MOISTURE;    MONITORING;    MONITORS;    NESTS;    PRECIPITATION;    SAFETY;    SEASONAL VARIATIONS;    SOILS;    STORAGE FACILITIES;    SURFACES;    VARIATIONS;    WATER;    ZONES Tank Farm;    Monitoring;    Vadose Zone;    Sensor;   

DOI  :  10.2172/1006294
RP-ID  :  PNNL--20144
PID  :  OSTI ID: 1006294
Others  :  Other: 830403000
Others  :  TRN: US201106%%95

学科分类：环境科学（综合）

美国|英语

来源: SciTech Connect

【 摘 要 】

The U.S. Department of Energy???s Office of River Protection has constructed interim surface barriers over a portion of the T and TY tank farms as part of the Interim Surface Barrier Demonstration Project. The interim surface barriers (hereafter referred to as the surface barriers or barriers) are designed to minimize the infiltration of precipitation into the soil zones containing radioactive contaminants and minimize the movement of the contaminants. As part of the demonstration effort, vadose zone moisture is being monitored to assess the effectiveness of the barriers at reducing soil moisture. Solar-powered systems were installed to continuously monitor soil water conditions at four locations in the T (i.e., instrument Nests TA, TB, TC, and TD) and the TY (i.e., instrument Nests TYA and TYB) Farms beneath the barriers and outside the barrier footprint as well as site meteorological conditions. Nests TA and TYA are placed in the area outside the barrier footprint and serve as controls, providing subsurface conditions outside the influence of the surface barriers. Nest TB provides subsurface measurements to assess surface-barrier edge effects. Nests TC, TD, and TYB are used to assess changes in soil-moisture conditions beneath the interim surface barriers.