Databank

Workreport 1998-7

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Name:

Vesinäytteiden otto ja analysointi Olkiluodon matalista porakonerei'istä PR3 ja PR4 sekä pohjavesiputkista PVP1 ja PVP2 vuonna 1997

Writer:

Marja Tuominen

Language:

Finnish

Page count:

47

Summary:

Working report: HYDROGEOCHEMICAL STUDIES AT OLKILUOTO DURING 1997:
DRILLED HOLES PR3 AND PR4 AND GROUND WATER PIPES PVP1 AND PVP2





ABSTRACT


Posiva Ltd has carried out site characterisation studies in order to determine
the suitability of Finnish crystalline bedrock for the final disposal of spent
nuclear fuel. In 1997 the detailed site investigations continued at Kuhmo,
Äänekoski, Eurajoki and Loviisa. The final site will be selected in 2000.

Hydrogeochemical characterisation and geochemical modelling require
information about groundwater located near the ground level. To fullfill
these requirements, new shallow percussion boreholes and ground water
pipes have been made.

This technical report describes sampling procedures and presents results of
the groundwater samples taken during autumn 1997 by Soil and Water Ltd.
at the Olkiluoto investigation site in Eurajoki. Samples were taken from
percussion borehole wells PR3 and PR4, and ground water pipes PVP1 and
PVP2.

In sampling special attention was made to take representative samples.
Water was pumped so long as it took for the quality of the samples to
stabilize. This was monitored by measuring pH conductivity, temperature
and dissolved oxygen in field during the pumping.

The groundwater samples were analysed in eight laboratories in Finland
and abroad. Some analyses were made in the field laboratory in nitrogen
atmosphere in order to avoid the direct contact with oxygen. The analytical
programme was quite extensive including the most relevant physico-
chemical parameters and also many isotopes.



Keywords: site investigation, groundwater, sampling
HYDROGEOCHEMICAL STUDIES AT OLKILUOTO DURING 1997:
DRILLED HOLES PR3 AND PR4 AND GROUND WATER PIPES PVP1 AND PVP2





ABSTRACT


Posiva Ltd has carried out site characterisation studies in order to determine
the suitability of Finnish crystalline bedrock for the final disposal of spent
nuclear fuel. In 1997 the detailed site investigations continued at Kuhmo,
Äänekoski, Eurajoki and Loviisa. The final site will be selected in 2000.

Hydrogeochemical characterisation and geochemical modelling require
information about groundwater located near the ground level. To fullfill
these requirements, new shallow percussion boreholes and ground water
pipes have been made.

This technical report describes sampling procedures and presents results of
the groundwater samples taken during autumn 1997 by Soil and Water Ltd.
at the Olkiluoto investigation site in Eurajoki. Samples were taken from
percussion borehole wells PR3 and PR4, and ground water pipes PVP1 and
PVP2.

In sampling special attention was made to take representative samples.
Water was pumped so long as it took for the quality of the samples to
stabilize. This was monitored by measuring pH conductivity, temperature
and dissolved oxygen in field during the pumping.

The groundwater samples were analysed in eight laboratories in Finland
and abroad. Some analyses were made in the field laboratory in nitrogen
atmosphere in order to avoid the direct contact with oxygen. The analytical
programme was quite extensive including the most relevant physico-
chemical parameters and also many isotopes.



Keywords: site investigation, groundwater, sampling

Keywords:

paikkatutkimukset; pohjavesi; näytteenotto

File(s):

Vesinäytteiden otto ja analysointi Olkiluodon matalista porakonerei'istä PR3 ja PR4 sekä pohjavesiputkista PVP1 ja PVP2 vuonna 1997 (pdf) (1.1 MB)


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