Databank

Workreport 1998-11

Back

Name:

Vedenjohtavuuden mittaukset Kuhmon Romuvaarassa. kairanreikä RO-KR11

Writer:

Heikki Hämäläinen

Language:

Finnish

Page count:

252

Summary:

Working report: HYDRAULIC CONDUCTIVITY MEASUREMENTS AT ROMUVAARA,
KUHMO, BOREHOLE RO-KR11

ABSTRACT

As a part of the detailed site investigations hydraulic conductivity
measurements were carried out in borehole KR11 at Romuvaara in
Kuhmo. Romuvaara is one of the four areas selected as possible locations
for the final repository of spent nuclear fuel. The objective was to in-
vestigate the distribution of hydraulic conductivity in the surrounding
bedrock volume.
Out of the total measurable length of 517,59 m in the borehole 148 m was
measured with 2 m packer separation. A total of 74 complete tests were
made. Additionally some tests were made to check the real depth of the
fractures at known locations. Double-packer constant-head method was
used throughout with generally 200 kPa head. Both injection and fall-off
stages lasted normally 15 minutes. Test section was stabilised for at least
5 minutes before the injection to find out the natural pressure. Some
sections were, however, stabilised or injected up to several hours. Two
transient (Horner and 1/Q) and one stationary-state (Moye) interpretations
were made immediately after the measurement.
Hydraulic Testing Unit, HTU-system, owned by Posiva Oy, was used and
operated by the crew of Geopros Ltd.

Keywords: HTU, hydraulic conductivity, constant head test, hydraulic injection
test
HYDRAULIC CONDUCTIVITY MEASUREMENTS AT ROMUVAARA,
KUHMO, BOREHOLE RO-KR11

ABSTRACT

As a part of the detailed site investigations hydraulic conductivity
measurements were carried out in borehole KR11 at Romuvaara in
Kuhmo. Romuvaara is one of the four areas selected as possible locations
for the final repository of spent nuclear fuel. The objective was to in-
vestigate the distribution of hydraulic conductivity in the surrounding
bedrock volume.
Out of the total measurable length of 517,59 m in the borehole 148 m was
measured with 2 m packer separation. A total of 74 complete tests were
made. Additionally some tests were made to check the real depth of the
fractures at known locations. Double-packer constant-head method was
used throughout with generally 200 kPa head. Both injection and fall-off
stages lasted normally 15 minutes. Test section was stabilised for at least
5 minutes before the injection to find out the natural pressure. Some
sections were, however, stabilised or injected up to several hours. Two
transient (Horner and 1/Q) and one stationary-state (Moye) interpretations
were made immediately after the measurement.
Hydraulic Testing Unit, HTU-system, owned by Posiva Oy, was used and
operated by the crew of Geopros Ltd.

Keywords: HTU, hydraulic conductivity, constant head test, hydraulic injection
test

Keywords:

HTU; vedenjohtavuus; vakiopainekoe; vesimenekkikoe

File(s):

Vedenjohtavuuden mittaukset Kuhmon Romuvaarassa. kairanreikä RO-KR11 (pdf) (3.7 MB)


Back


Share article:
This website stores cookies on your computer. These cookies are used to improve our website and provide more personalised services to you.
Close

Cookies

To make this site work properly, we sometimes place small data files called cookies on your device. Most big websites do this too.

1. What are cookies?

A cookie is a small text file that a website saves on your computer or mobile device when you visit the site. It enables the website to remember your actions and preferences (such as login, language, font size and other display preferences) over a period of time, so you don’t have to keep re-entering them whenever you come back to the site or browse from one page to another.

2. How do we use cookies?

A number of our pages use cookies to remember your actions and preferences (such as login, language, font size and other display preferences.)

Also, some videos embedded in our pages use a cookie to anonymously gather statistics on how you got there and what videos you visited.

Enabling these cookies is not strictly necessary for the website to work but it will provide you with a better browsing experience. You can delete or block these cookies, but if you do that some features of this site may not work as intended.

The cookie-related information is not used to identify you personally and the pattern data is fully under our control. These cookies are not used for any purpose other than those described here.

3. How to control cookies

You can control and/or delete cookies as you wish – for details, see aboutcookies.org. You can delete all cookies that are already on your computer and you can set most browsers to prevent them from being placed. If you do this, however, you may have to manually adjust some preferences every time you visit a site and some services and functionalities may not work.

Close