Surface-to-Borehole and Surface Electromagnetic Surveys at the Hanford Leak Experiment

Hoversten, Gary M.

Pacific Northwest National Laboratory (U.S.)

关键词: Magnetic Fields;    Boreholes;    Fluid Flow;    11 Nuclear Fuel Cycle And Fuel Materials;    Electric Fields;   

DOI  :  10.2172/15010153
RP-ID  :  PNNL-13793
RP-ID  :  AC05-76RL01830
RP-ID  :  15010153

美国|英语

来源: UNT Digital Library

【 摘 要 】

This is a preliminary report detailing the electromagnetic (EM) surveys and data interpretation for the leak experiment at the Hanford site. Two types of EM surveys were planned for the Hanford leak experiment held between June 5 and July 23, 2000. One survey used surface EM transmitters and borehole vertical magnetic field receivers (surface to borehole). Another survey consisted only of surface measurements, where an EM transmitter was located on the surface, and EM impedance measurements (complex ratio of electric field divided by orthogonal magnetic field) were made on a line across the expected path of the fluid flow from the leak experiment. Both these types of measurements were carried out at three times, once before any water was released, once just after the first 1000 gal were released, and once after all five 1000 gal releases were completed. The object of the measurements was to try to image conductivity changes in the top 20 m of the vadose zone caused by the introduction of the fluids.