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| | Abstract | | For the site selection of high-level radioactive waste geologic repository around the coastal area survey, the geophysical exploration methods that can be applied are limited. Therefore, the authors have developed the marine EM receiver system as part of the seabed electromagnetic exploration method which is important issue in the coastal area of electromagnetic survey for high-level radioactive waste geologic repository project. This article, regarding to electromagnetic noise problems for measurement in accordance with the movement of tidal waves in the coastal area survey, a test survey has been conducted and found out 0.1 Hz band noise by the effect of tidal waves. To apply Electromagnetic exploration method for the coastal area in shallow water depth, new system that had improved to minimize the impact of tidal waves movement by the lower-floor shape of the casing with anchored buoy, and the existing system with topping buoy type receiver have been compared in the test at water depth of 15 meters to 27 meters. As a result of this test, 0.1 Hz band noise in new system has been improved. |
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