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Geophysical investigations of the Romuvaara area, Finland. Summary report

Technical Report:

Abstract

In the study area of Romuvaara, investigations have been carried out during 1987 - 90 with the aim of finding out whether the polyphasically deformed Precambrian gneiss complex is suitable for the final disposal of spent nuclear fuel. The bedrock has been studied by geological, geophysical, geohydrological and geochemical methods. Airborne, ground and borehole geophysical surveys were used in studying the rock type distribution, fracturing and hydraulic conductivity of the bedrock to a depth of one kilometre. Airborne surveys (magnetic, radiometric and two electromagnetic methods) and ground surveys (VLF and VLF-R, magnetic and soil radar methods) were useful in distinguishing the metadiabases, amphibolites and granodiorites from the less magnetized migmatites. The electromagnetic and seismic refraction surveys were used in locating crushed and fractured zones. The rock type distribution was studied by single-hole logging of susceptibility, natural {gamma} radiation and radiometric {gamma}-{gamma} -density. Electrical and acoustic logging served the mapping of fractures and the interpretation of water injection tests. The flow conditions in the boreholes were studied by fluid logging and tube-wave sounding. The rock volume surrounding the boreholes was mapped by borehole radar with a frequency of 22 MHz. The upper parts of the boreholes were also studied by vertical  More>>
Authors:
Saksa, P; [1]  Ahokas, H; [2]  Paananen, M [3] 
  1. ed.
  2. Saanio and Riekkola Consulting Engineers, Helsinki (Finland)
  3. Geological Survey of Finland, Kupis (Finland); and others
Publication Date:
Jun 01, 1991
Product Type:
Technical Report
Report Number:
YJT-91-15
Reference Number:
SCA: 052002; 540250; PA: AIX-23:007606; SN: 92000619551
Resource Relation:
Other Information: PBD: Jun 1991
Subject:
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; 54 ENVIRONMENTAL SCIENCES; FINLAND; GEOPHYSICAL SURVEYS; UNDERGROUND DISPOSAL; SPENT FUELS; FRACTURING; GNEISSES; HYDRAULIC CONDUCTIVITY; RADIOACTIVE WASTE DISPOSAL; SITE SURVEYS; 052002; 540250; WASTE DISPOSAL AND STORAGE; SITE RESOURCE AND USE STUDIES
OSTI ID:
10104352
Research Organizations:
Voimayhtioeiden Ydinjaetetoimikunta, Helsinki (Finland)
Country of Origin:
Finland
Language:
English
Other Identifying Numbers:
Other: ON: DE92612736; TRN: FI9100114007606
Availability:
OSTI; NTIS (US Sales Only); INIS
Submitting Site:
FIN
Size:
146 p.
Announcement Date:
Jun 30, 2005

Technical Report:

Citation Formats

Saksa, P, Ahokas, H, and Paananen, M. Geophysical investigations of the Romuvaara area, Finland. Summary report. Finland: N. p., 1991. Web.
Saksa, P, Ahokas, H, & Paananen, M. Geophysical investigations of the Romuvaara area, Finland. Summary report. Finland.
Saksa, P, Ahokas, H, and Paananen, M. 1991. "Geophysical investigations of the Romuvaara area, Finland. Summary report." Finland.
@misc{etde_10104352,
title = {Geophysical investigations of the Romuvaara area, Finland. Summary report}
author = {Saksa, P, Ahokas, H, and Paananen, M}
abstractNote = {In the study area of Romuvaara, investigations have been carried out during 1987 - 90 with the aim of finding out whether the polyphasically deformed Precambrian gneiss complex is suitable for the final disposal of spent nuclear fuel. The bedrock has been studied by geological, geophysical, geohydrological and geochemical methods. Airborne, ground and borehole geophysical surveys were used in studying the rock type distribution, fracturing and hydraulic conductivity of the bedrock to a depth of one kilometre. Airborne surveys (magnetic, radiometric and two electromagnetic methods) and ground surveys (VLF and VLF-R, magnetic and soil radar methods) were useful in distinguishing the metadiabases, amphibolites and granodiorites from the less magnetized migmatites. The electromagnetic and seismic refraction surveys were used in locating crushed and fractured zones. The rock type distribution was studied by single-hole logging of susceptibility, natural {gamma} radiation and radiometric {gamma}-{gamma} -density. Electrical and acoustic logging served the mapping of fractures and the interpretation of water injection tests. The flow conditions in the boreholes were studied by fluid logging and tube-wave sounding. The rock volume surrounding the boreholes was mapped by borehole radar with a frequency of 22 MHz. The upper parts of the boreholes were also studied by vertical radar profiling (VRP). Larger volumes of rock were mapped by vertical seismic profiling (VSP) using 4 - 5 transmitter shotholes per borehole.}
place = {Finland}
year = {1991}
month = {Jun}
}