Tank Leak Detection Demonstration at the Hanford Site, Washington in 2001, Using Geophysical Techniques

摘要

During July and August of 2001, Pacific Northwest National Laboratory (PNNL), hosted researchers fromrnLawrence Livermore National Laboratory (LLNL) Lawrence Berkeley National laboratory (LBNL), and a private contractor,rnHydroGEOPHYSICS, Inc., for deployment of the following five geophysical leak-detection technologies at the Hanford SiternMock Tank in a Tank Leak Detection Demonstration (TLDD): 1) Electrical Resistivity Tomography (ERT), 2) Cross-rnBorehole Electromagnetic Induction (CEMI), 3) High-Resolution Resistivity-Steel Casing Resistivity Technology (HRRSCRT),rn4) Cross-Borehole Radar (XBR), and 5) Cross-Borehole Seismic Tomography (XBS).rnOf the five methods tested, the electrical methods (ERT and HRR-SCRT) more consistently detected the simulated leak, underrnthe imposed test conditions. The TLDD was designed to provide data to determine the lower limits of sensitivity, includingrnboth minimum detectable effluent volume and time-to-detection of methods described below. This testing is a precursor tornpossible deployment of the most successful leak-detection methods around an actual single-shell tank at the Hanford Site.