Micro-seismic piezoelectric transmitters installed in the Boom Clay at HADES produce predominantly high frequency signals, above 5 kHz, which favour the generation of P waves. However, above 5 kHz shear (S) waves are not detected by the installation. Recent studies at HADES indicate that it is possible to detect S waves with the current setup when applying a low (5 kHz) cut-off filter. The results also show that S waves have frequencies mainly below 1 kHz, while P waves are detectable at all of the eight transmitted frequencies but show optimum resolution in the range of 7 to 23 kHz. Although the system offers great potential for monitoring the evolution of a geological disposal site, further improvements in signal generation and treatment are necessary. One of these includes the design and testing of a new S-wave source at HADES planned in the framework of the EC MoDeRn project (http://www.modern-fp7.eu/).
|Title of host publication||WM2012 Conference Proceedings (on CD)|
|Place of Publication||Phoenix, AZ, United States|
|State||Published - Feb 2012|
|Event||Waste Management 2012 - American Nuclear Society (ANS), Phoenix, AZ|
Duration: 26 Feb 2012 → 1 Mar 2012
|Conference||Waste Management 2012|
|Period||2012-02-26 → 2012-03-01|