Databank

Workreport 1997-8

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Name:

Loviisan Hästholmenin tutkimusalueen kallioperän alustava mallikuvaus

Writer:

Juha Lindh; Jorma Nummela; Pauli Saksa

Language:

Finnish

Page count:

52

Summary:

Working report: Lindh, J., Nummela, J. & Saksa, P. 1997. Preliminary bedrock
model of Loviisa Hästholmen site. Fintact Ltd., Helsinki. Work Re-
port POSIVA-97-08. 49 p. (in Finnish).

ABSTRACT

Posiva Oy studies and is responsible for the final disposal of the
high-level nuclear fuel waste into the Finnish bedrock. Site
characterisation was initiated in 1987 and the first phase was
reported in 1992. Further characterisation has been in progress
at Kuhmo Romuvaara, Äänekoski Kivetty and Eurajoki Olkiluoto
sites to collect and supplement detailed site data since 1993.
Posiva decided to begin site characterisation also at Loviisa
Hästholmen area during 1997.

The observations, interpretations and estimates resulting from
site investigations are developed into conceptual bedrock model.
Investigation results have been collected at Hästholmen area
since construction works of nuclear power plants, from
investigations and construction of low and intermediate nuclear
waste repository, from general geological base mappings and
recently, from suitability study of Loviisa area to disposal of spent
nuclear fuel waste. In this report results of Loviisa area from
several sources are combined and compiled to Posiva’s computer
aided geological ROCK-CADTM modelling system. The basic data
is comprised of geographical maps, infrastructure, underground
facilities and realised surveying lines.

The Loviisa Hästholmen bedrock model (version 1.0) contains
data from percussion drilled boreholes, groundwater stations and
core drilled boreholes. Associated fracturing, structural and
lithological data has been incorporated from the most important
Y-labelled boreholes.

The bedrock structure is described numerous fracture and
crushed zones derived from the previous site model. In addition,
other interpreted geometrical features have been covered from
suitability study of Loviisa area. The lithological map has been
utilised to form a 3-D rock body skeleton for future supplement.
The type of rapakivi granite are viborgite, pyterlite, dark pyterlite,
viborgite-pyterlite, porphyritic granite and even-grained granite.
New boreholes HH-KR01 - 03 to be drilled during 1997 have been
described in the model. The Hästholmen area bedrock model
serves as planning base for investigations and it will be
supplemented when new results will be available.


Keywords: CAD, structures, lithology, topography, bedrock
model, borehole
Lindh, J., Nummela, J. & Saksa, P. 1997. Preliminary bedrock
model of Loviisa Hästholmen site. Fintact Ltd., Helsinki. Work Re-
port POSIVA-97-08. 49 p. (in Finnish).

ABSTRACT

Posiva Oy studies and is responsible for the final disposal of the
high-level nuclear fuel waste into the Finnish bedrock. Site
characterisation was initiated in 1987 and the first phase was
reported in 1992. Further characterisation has been in progress
at Kuhmo Romuvaara, Äänekoski Kivetty and Eurajoki Olkiluoto
sites to collect and supplement detailed site data since 1993.
Posiva decided to begin site characterisation also at Loviisa
Hästholmen area during 1997.

The observations, interpretations and estimates resulting from
site investigations are developed into conceptual bedrock model.
Investigation results have been collected at Hästholmen area
since construction works of nuclear power plants, from
investigations and construction of low and intermediate nuclear
waste repository, from general geological base mappings and
recently, from suitability study of Loviisa area to disposal of spent
nuclear fuel waste. In this report results of Loviisa area from
several sources are combined and compiled to Posiva’s computer
aided geological ROCK-CADTM modelling system. The basic data
is comprised of geographical maps, infrastructure, underground
facilities and realised surveying lines.

The Loviisa Hästholmen bedrock model (version 1.0) contains
data from percussion drilled boreholes, groundwater stations and
core drilled boreholes. Associated fracturing, structural and
lithological data has been incorporated from the most important
Y-labelled boreholes.

The bedrock structure is described numerous fracture and
crushed zones derived from the previous site model. In addition,
other interpreted geometrical features have been covered from
suitability study of Loviisa area. The lithological map has been
utilised to form a 3-D rock body skeleton for future supplement.
The type of rapakivi granite are viborgite, pyterlite, dark pyterlite,
viborgite-pyterlite, porphyritic granite and even-grained granite.
New boreholes HH-KR01 - 03 to be drilled during 1997 have been
described in the model. The Hästholmen area bedrock model
serves as planning base for investigations and it will be
supplemented when new results will be available.


Keywords: CAD, structures, lithology, topography, bedrock
model, borehole

Keywords:

tietokoneavusteinen mallintaminen; rakenteet; kivilajit; topografia; kalliomalli; kairanreikä

File(s):

Loviisan Hästholmenin tutkimusalueen kallioperän alustava mallikuvaus (pdf) (3 MB)


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