gefinex 400s (sampo) fm-soundings at olkiluotosampo results have been processed with gtk sampo...

Working Report 2005-43

Gefinex 400S (SAMPO) fM-soundings at Olkiluoto 2005

POSIVA OY

Fl-27160 OLKILUOTO, FINLAND

Tel. +358-2-8372 31

Fax +358-2-8372 3709

Tarmo ..Jokinen

~ukka Lehtimaki

August 2005

TEKIJAORGANISAATIO:

TILAAJA:

TILAAJAN YHDYSHENKILO:

TILAUSNUMEROT:

TEKIJAORGANISAA TION YHDYSHENKILO:

TARKASTAJA:

Geologian tutkimuskeskus PL 96 (Betonimiehenkuj a 4) 02151 ESPOO

Posiva Oy 27160 Olkiluoto

~~~ Turo Ahokas

9628/05/TUAH

Jukka Lehtimaid

Work Report:

Posiva Oy

GTK

Gefinex 400S (SAMPO) EM-soundings at Olkiluoto 2005

Ilmo Kukkonen GTK Toimialapaallikko Etela-Suomen yksikko/ geofysiikka

Working Report 2005-43

Gefinex 400S (SAMPO) [M-soundings at Olkiluoto 2005

Tarmo .Jokinen

.Jukka Lehtimaki

Geological Survey of Finland

August 2005

Base maps: ©National Land Survey, permission 41 /MYY/05

Working Reports contain information on work in progress

or pending completion.

The conclusions and viewpoints presented in the report

are those of author(s) and do not necessarily

coincide with those of Posiva.

GEFINEX 400S (SAMPO) EM-LUOTAUKSET OLKILUODOSSA 2005

TIIVISTELMA

Geologian tutkimuskeskus teki kesan 2005 alussa sahkomagneettisia taajuusluotauksia Gefinex 400S-laitteistolla (Sampo) Olkiluodon ydinvoimala-alueella. Nyt mitattiin samat pisteet kuin edellisena vuotena samaan aikaan kayttaen hyvaksi maastoon edellisen mittauksen yhteydessa merkittyja lahetin- ja vastaanotinpisteiden paikkoja. Monitorointimittausten tavoitteena on selvittaa sahkoistenjohteiden sijainti ONKALO:nja loppusijoitustilojen alueella, esimerkiksi suolaisen pohjaveden tasomuutosten tarkkailussa. Kaikkiaan tehtiin 48 luotausta, joista muodostuu kaksi toisistaan 200 m:n etaisyydella sijaitsevaa 1400 m pitkaa rintamamittaus profiilia, joilla pistevali on 200 m. Profiilit on mitattu kelavaleilla 200, 500 ja 800 m.

Luotaustuloksissa esiintyy runsaasti alueen lukuisten kaapelien ja sahkolinjojen aiheuttamia hairioefekteja. Hairioiden takia 8 pisteessa ei saatu mittaustulosta, naista muutamassa ei pystytty tekemaan edes taustamittausta. Kuitenkin yleensa luotausten toistettavuus on hyva ja osa pisteista sopii hyvin monitorointiin. Vertaamalla uusia kayria vuoden 2004 mittauksiin voidaan havaita pienia muutoksia joissakin ARD-kayrissa.

Avainsanat: Elektromagneettiset taajuusluotaukset, Sampo, Olkiluoto, ONKALO, loppusijoitus, sahkoisten johteiden monitorointi

GEFINEX 400S (SAMPO) EM-SOUNDINGS AT OLKILUOTO 2005

ABSTRACT

In the beginning of summer 2005 Geological Survey of Finland carried out electromagnetic frequency soundings with Gefinex 400S equipment (called also Sampo) at Olkiluoto nuclear power plant area. The aim of the measurements was to repeat the same soundings as in 2004 and map the changes of the electric conductivity at ONKALO and repository area. The target of monitoring is for example the level of the salty groundwater.

The total number of the soundings was 48. The measurements form two 1400 m long broadside profiles, which have 200 m mutual distance and 200 m station separation. The profiles have been measured using 200, 500, and 800 m coil separations.

The numerous power lines and the cables of the area generate strong disturbances and 3-D effects on the sounding curves, but the repeatability of the results is good. Compared with the 2004 curves small deformation can be seen in some ARD curves.

Key Words: Electromagnetig frequency soundings, Sampo, Olkiluoto, ONKALO, repository, monitoring of electric conductors

2

GEFINEX 400S (SAMPO) EM SOUNDINGS AT OLKILUOTO 2005

TIIVISTELMA

ABSTRACT

TABLE OF CONTENTS

1. FOREWORD 2. METHOD AND INSTRUMENTATION 3. DATA PROCESSING 4. FIELD WORK 5. DATA PRESENTATION AND STORING 6. COMPARISON OF THE 2004 AND 2005 RESULTS 7. SUMMARY

BffiLIOGRAPHY

APPENDICES

GEFINEX 400S (SAMPO) EM SOUNDINGS AT OLKILUOTO 2005

1.FOREWORD

The work was done using electromagnetic frequency domain sounding system Gefinex 400S owned by GTK. The field team consisted of geophysicist Jukka Lehtimaki and assistants Jukka Piispa, Keijo Kontio and Terho Turunen. This report is prepared by Tarmo J okinen and Jukka Lehtimaki

2. METHOD AND INTSRUMENTATION

3

GEFINEX 400S (known also as SAMPO) is a frequency domain wide band electromagnetic sounding system developed in cooperation by Outokumpu Elektroniikka and Geological Survey of Finland (GTK). The system has been used in general structural mapping, mineral exploration, groundwater studies, especially mapping of saline interfaces and in engineering site investigations and other environmental applications.

The transmitter is a horizontal current loop that creates a vertical magnetic dipole. The diameter of the loop varies according to the used transmitter- receiver (Tx- Rx) separation from 10- 65 m. The receiver measures 3 perpendicular components of the total field. The relations Bz/Br, Bz/Bt and the phase differencies between the components are calculated. The system operates at 81 fixed frequencies within the band 2 - 20000 Hz. The maximum investigation depth is about the same as the distance between the Tx and the Rx, which can be selected from 50 to 1500 m.

There is a radio link between Tx and Rx and no cable connection is needed. The profiles can be measured using in-line or broad-side configuration. For data presentation the midpoint of Tx-Rx represents the measurement point, but the method is not reciprocal. Figure (1) shows the measurement configuration of the system.

TRANSMITTER RECEIVER

! 1 010-65 m

E'Y> L=50-1500m

Figure 1. Measurement configuration of the SAMPO EM system.

SAMPO measurement program controls the quality of the data during the sounding. Every measured frequency is controlled separately. If the variation of the readings is higher than the value set by the operator, the instrument stacks more readings to get the good result. The readings are stored in the memory of receiver. It takes typically less than 10 minutes to measure the whole frequency band.

4

3. DATA PROCESSING

At field camp the results are downloaded to PC and a backup copy is done.

In the data processing the apparent resistivity-depth (ARD-) transformation is calculated. The ARD-transformation is calculated individually for every frequency by the measured ratio of the vertical and the radial magnetic fields (Bz/Br) and the coil separation. ARD-transformation is based on a horizontal two-layer model (Aittoniemi et all).The ratio Bz/Br depends on the conductivity structure of the earth and the geometry between transmitter and receiver coils.

In the interpretation it's supposed that the transmitter loop and the horizontal receiver loop are lying on the same plane. The effect of the geometry (tilt and height deviations) is removed mathematically from the ratio Bz/Br. The correction is based on the fact that at low frequencies the Br component is caused almost totally by the alignment errors between transmitter and receiver loops.

The ARD-transformation makes it easier to visually estimate the number and the depth of the layers for the inversion and to estimate the fit between the measured and the calculated theoretical data. The sounding curve is presented in a picture where the resistivities increase to the right on the horizontal axis and the depth increases downwards on the vertical axis (Fig. 2).

If the earth is a homogenous half space the points of the sounding curve form a vertical straight line. The position of the line on the resistivity axis shows the resistivity of the homogenous half space (Fig. 2, curve A). When the second layer of the model is more conductive than the topmost one the curve starts to turn to the left (to the more conductive direction) at the depth of the conductor. After getting through the conductors the sounding curve turns back to the vertical direction (Fig 2, curve B).

I SRt·1PO

, LR\'EP t·10DEL l I t·iT EF~F'RETAT I Dt·i

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1000 -tOO

T·--------------------' j

50

•.. -<:lll- •• - - - - -- - •• - • - . - - .

i

' L. -~m !m

1000

B-

Figure 2. Sampo sounding curves.

, I

a\~lhm-~ l

Homogenious half space (A), conductive intermediate layer (B)

4. FIELD WORK

The field work was done during one week, from 30 May to 3 June. The same LK coordinate system (Fig. 1-3) was used as in the 2004 survey. The Tx- and Rx-station sticks were marked permanently already in 2004.

The coordinates of the common point of KKJ and LK systems are:

5

X=6791.352 Y=1526.200 L=10.000 K=50.000 The angle between X (north) and K is 35.166 degrees

The wooden Tx-marks are placed in the middle of the circular 20 m transmitter loop. With 50 m x 50 m square loops the mark of the loop is in the middle of the side that is situated on the Lline. So the midpoint of the loop is situated 25 m from the line. During the survey some lost marked sticks were replaced and marked with tape using Focus DGPS system.

The study consisted of two parallel 1400 m long broadside lines, which were measured using Tx/Rx distances 200 m, 500 m and 800 m. The Tx loop diameter for 200 m soundings was 20 m and 50 m x 50 m for 500 m and 800 m soundings. The station interval was 200 m. All coil separations of the two adjacent broadside sounding points of lines K=50.400 and 50.600 were measured one after another. Tx and Rx moved along L-lines. In practice the field work resembled in-line measurement using varying coil separations. The final broadside lines were later collected from the in-line data. ·

There are 5 soundings with exceptional Tx/Rx direction. Those soundings are not based on the LK-coordinate system. The site of Rx has been determined with Garmin GPS 48 and the site of Tx with Focus DGPS.

In all 48 soundings were measured. Location coordinates are listed in appendices 1-3. In 8 stations the measurement was not succeeded ("No results" in the appendices note column)

1525000 1525500 1526500

6

1527000

(j) -...J

~~~~------~=---~~~~~~=~~~~~.~~~~=-~-=~~=---~~~~---+~~~~----------~~~ ·' ~~; (]I

1525000 mittakaava 1 : 12500

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SAMPO sounding lines:

x Receiver

l!J Transmitter

e Sounding point (Midpoint)

1526000

K50400 K50600

ig.3 Locations of SAMPO soundings, L=200 m

1526500 1527000

Local LK-coordination system:

Common point:

0 0

XO 6971.352 YO 1526.200 LO 10.000 KO 50.000 X (North)-K angle 35.2 deg.

1525000 1525500 1526000 1526500

7

1527000

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K50400 K50600


8

1526500 1527000


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1525000

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metria

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1525500


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1526000

1526000

K50400 K50600


8

1526500 1527000

1526500 1527000


Common point: XO 6971.352 YO 1526.200 LO 10.000 KO 50.000 X (North)-K angle 35.2 deg.

5. DATA PRESENTATION AND STORING

SAMPO results have been processed with GTK SAMPO program (Saltandgrain , Ville Sipola, M.Sc Thesis 2002) and Geosoft OASIS GTK SAMPO GX (Arto Korpisalo 2005) Principle of the data processing is described in the chapter 3 of this report.

The tilt corrected ARD results are presented in scale 1:5000 on (6 profiles, appendices 4-9). The profiles include both the 2004 (blue curves) and 2005 (red curves) sounding curves. In the figures 4-6 the results from 2004 and 2005 of three separate sounding sites have been presented.

SAMPO sounding data has been collected in 6 broadside line files (ASCII):

2005_K50400_200.sam (Line K50400, coil separation 200 m) 2005_K50400_500.sam (Line K50400, coil separation 500 m) 2005_K50400_800.sam (Line K50400, coil separation 800 m) 2005_K50600_200.sam (Line K50600, coil separation 200 m) 2005_K50600_500.sam (Line K50600, coil separation 500 m) 2005_K50600_800.sam (Line K50600, coil separation 800 m)

SAMPO sounding data is stored on CD disc including the data folders for every measurement day (30.5-3.6) and the summary folder including the 6line files and the OASIS ~ata bases.

6. COMPARISON OF THE 2004 AND 2005 RESULTS

Both the 2004 and the 2005 results are presented in the appendices 4-9. The figure 6 shows an example of soundings (2004 and 2006) using 200 m coil separation, figure 7 500 m coil separation soundings and figure 8 800 m coil separation soundings.

The repeated soundings show that the accuracy and repeatibility of the measurements is fair in spite of the power line, cable etc. noise.

9

The soundings have been classified in three categories according to the quality of the ADRtransformation (Appendices 1-3). The ARD-transformations with slight disturbances are marked in category one (best quality). Category three contains soundings with severe disturbances. * (asterisk) in the quality column means that it was not possible to do the sounding but the background measurement could be done. **means that the site was too noisy even for the background measurement.

The Olkiluoto nuclear power plant and ONKALO region is under very active construction at the moment. Compared with the 2004 curves some of the new sounding curves have likely been deformed by the new structures or by the alteration of the overburden moisture. (Fig 4. Sounding K50600/Ll0.20, coil separation 200 m and Fig 5. Sounding K50400/L10.0, coil separation 500 m).

en

OLKILUOTO SAMPO EM MONITORING

0 ~------------~r-------------~--------------~ 10 00

-50+---------------------------------------------~

100,00 1000,00 100 0,00

-1 00 +----------------------------.::!11

s -150 +-------------------------~------------------1 Cl)

E ~ -200+-----------------------~~L------------------l a Cl)

c E -250 +------------------------------:~111-------------------l Cl) '-ea ~ -300+-------------------------~·._-----------------l <

-450~--------------------------------------------~

Apparent Resistivity, Ohmim

l-+-2004_k50600/11 0.20_200 --a- 2QOS_k50600/L 1 0.20_200 I

Figure 6. SAMPO sounding K50600/L10.200, Coil separation 200 m

10

SAMPO EM MONITORING, OLKILUOTO SAMPO EM MONITORING, OLKILUOTO

10,00 100,00 1000,00 10000,00

0,---------~--------~-------,


1 ~2004_K50400/L10.0_500 ---2005_K50400/L10.0_500 I

Figure 7. SAMPO sounding K50400/L10.000,

Coil separation 500 m.

0,00 10 00 100,00

-100,00

-200,00

en -300,00 Gi i E -400,00 £ a

-500,00 Cl)

c "E ~ -600,00 ea Q. Q.

< -700,00

-800,00

-900,00

-1000,00 _.__ ________________________ --J


1-+-2004_K50400/L 1 0.0 ----2005_K50400/L 1 0.0_800 I

Figure 8. SAMPO sounding K50400/Ll 0.000,

Coil separation 800 m.

11

?.SUMMARY

The field work was done during one week 30.5-3.6.2005 and the same marked Tx/Rx sites were used as in the 2004 survey. The numerous power lines and the cables of the area caused disturbances and 3-D effects on the sounding curves, but however the repeatability of the results was good.

Compared with the 2004 ARD curves some of the new sounding curves have been slightly changed. The differencies may be caused by the new structures or the alteration of moisture of soil and bedrock.

BffiLIOGRAPHY

Aittoniemi, K., Rajala, J. ja Sarvas, J, 1987. Interactive inversion algorithm and apparent resistivity versus depth (ARD) plot in multifrequency depth soundings. Acta Polytechnica Scandinavica, Applied Physics Series No 157, 30 pp+app.

Sipola, Ville -Petteri, 2002. Sahkomagneettisen Sampo-monitaajuusluotaimen uusi tuloskasittely- ja tulkintaohjelmisto. Diplomityo Teknillinen Korkeakoulu, materiaali- ja kalliotekniikan osasto.

Korpisalo, Arto, 2005. Geosoft OASIS GTK SAMPO GX software.

12

APPENDICES

1. List of of SAMPO soundings, coil separation 200 m, line K50.400 and K50.600

2. List of of SAMPO soundings, coil separation 500 m line K50.400 and K60.600

3. List of of SAMPO soundings, coil separation 800 m, line K50.400 and K50.600

4. SAMPO ARD profile K50.400, coil separation 200 m, 2004 and 2005 results






13

Appendix 1

Line L K X y Midpoint Midpoint Quality Note K50.400 X y Class L=200 L K Tx 10.000 50.500 6791.761 1526.488 6791.679 1526.431 1 Rx 10.000 50.300 6791.597 1526.373 10.000 50.400 Tx 10.200 50.500 6791.876 1526.325 6791.794 1526.267 1 Rx 10.200 50.300 6791.712 1526.210 10.200 50.400 Tx 10.400 50.590 6792.065 1526.213 6791.967 1526.144 2 Tx placement Rx 10.400 50.350 6791.869 1526.075 10.400 50.470 Changed, L=240 m Tx 10.600 50.500 6792.106 1525.998 6792.025 1525.940 3 Rx 10.600 50.300 6791.943 1525.883 10.600 50.400 Tx 10.800 50.500 6792.222 1525.835 6792.140 1525.777 * No results Rx 10.800 50.300 6792.058 1525.719 10.800 50.400 Background meas. Tx 11.000 50.500 6792.337 1525.671 6792.255 1525.613 1 Rx 11.000 50.300 6792.174 1525.559 11.000 50.400 Tx 11.200 50.500 6792.452 1525.508 6792.371 1525.450 1 Rx 11.200 50.300 6792.289 1525.392 11.200 50.400 Tx 11.400 50.500 6792.568 1525.344 6792.486 1525.287 * No results Rx 11.400 50.300 6792.404 1525.229 11.400 50.400 Background meas.

Line L K X y Midoint Midpoint Quality K50.600 X y Class L=200 Tx 10.000 50.700 6791.924 1526.604 6791.842 1526.546 1 Rx 10.000 50.500 6791.761 1526.488 10.000 50.600 Tx 10.200 50.700 6792.039 1526.440 6791.958 1526.382 1 Rx 10.200 50.500 6791.876 1526.325 10.200 50.600 Tx 10.400 50.700 6792.155 1526.277 6792.060 1526.245 3 Tx placement Rx 10.400 50.590 6791.965 1526.213 10.400 50.645 Changed, L=11 0 m Tx 10.600 50.700 6792.270 1526.113 6792.188 1526.057 3 Rx 10.600 50.500 6792.106 1525.998 10.600 50.600 Tx 10.800 50.700 6792.385 1525.950 6792.303 1525.892 * No results Rx 10.800 50.500 6792.222 1525.835 10.800 Tx 11.000 50.700 6792.500 1525.786 6792.419 1525.729 2 Rx 11.000 50.500 6792.337 1525.671 11.000 Tx 11.200 50.700 6792.616 1525.623 6792.534 1525.565 1 Rx 11.200 50.500 6792.452 1525.508 11.200 Tx 11.400 50.700 6792.731 1525.460 6792.649 1525.402 * No results Rx 11.400 50.500 6792.568 1525.344 11.400 Background meas.

14

Appendix 2

Line L K X y Midpoint Midpoint Quality Note K50.400 X y Class K=500 L K Tx 9.975 50.650 6791.869 1526.595 6791.671 1526.441 1(2) Rx 10.000 50.150 6791.475 1526.287 9.988 50.600 Tx 10.175 50.650 6791.984 1526.432 6791.7807 1526.277 2(1) Rx 10.200 50.150 6791.590 1526.123 10.188 50.600 Tx 10.375 50.700 6792.140 1526.297 6791.943 1526.142 2 Rx 10.400 50.200 6791.746 1525.988 10.388 50.650 Tx 10.575 50.650 6792.215 1526.105 6792.018 1525.950 3 Repeated Rx 10.600 50.150 6791.820 1525.796 10.588 50.600 sounding Tx 10.775 50.650 6792.330 1525.941 6792.133 1525.787 3 Repeated Rx 10.800 50.150 6791.936 1525.633 10.788 50.600 sounding Tx 10.975 50.650 6792.445 1525.778 6792.248 1525.623 3 Rx 11.000 50.150 6792.051 1525.469 10.988 50.600 Tx 11.175 50.650 6792.560 1525.615 6792.384 1525.474 2 Tx placement

Rx 11.200 50.200 6792.207 1525.334 11.188 50.625 changed, L=450m (Rx=50.190 ?)

Tx 11.375 50.650 6792.676 1525.451 6792.479 1525.296 3 Rx 11.400 50.150 6792.282 1525.142 11.488 50.600

Line L K X y Midpoint Midpoint Quality Note K50.600 X y Class L=500 L K Tx ·9.975 50.850 6792.032 1526.710 6791.835 1526.557 1(2) Rx .10.000 50.350 6791.638 1526.402 9.988 50.600 Tx 10.175 50.850 6792.148 1526.547 6791.971 1526.407 2(3) Rx 10.200 50.350 6791.753 1526.238 10.188 50.600 Tx XY 10.252 50.774 6792.130 1526.440 6792.077 1526.215 2 Rx 10.560 50.407 6792.007 1525.977 10.406 50.590 Tx XY 10.753 50.798 6792.415 1526.030 6792.177 1526.038 3 Rx 10.464 50.399 6791.906 1526.045 10.608 50.598 Tx 10.825 50.850 6792.522 1526.016 6792.311 1525.882 * * No results Rx 10.800 50.350 6792.099 1525.748 10.813 50.600 Tx 11.025 50.850 6792.637 1525.852 6792.426 1525.718 3 Rx 11.000 50.350 6792.214 1525.585 11.013 50.600 Tx 11.175 50.850 6792.734 1525.730 6792.527 1525.575 2 Rx 11.200 50.350 6792.330 1525.421 11.188 50.600 Tx 11.375 50.850 6792.839 1525.566 6792.642 1525.412 * * No results Rx 11.400 50.350 6792.445 1525.258 11.388 50.600

15

Appendix 3

Line L K X y Midpoint Midpoint Quality Note K50.400 y X Class K=800 L K Tx 9.975 50.800 6791.991 1526.682 6791.665 1526.451 2 Rx 10.000 50.000 6791.352 1526.200 9.988 50.400 Tx 10.175 50.800 6792.107 1526.518 6791.787 1526.277 2 Rx 10.200 50.000 6791.467 1526.037 10.188 50.400 TxXY 10.252 50.774 6792.130 1526.440 6791.912 1526.103 * Background Rx 10.553 50.030 6791.695 1525.765 10.403 50.402 meas. Tx XY 10.752 50.771 6792.415 1526.030 6792.027 1525.940 * Background Rx 10.452 50.031 6791.638 1525.849 10.601 50.401 me as. Tx 10.825 50.800 6792.481 1525.987 6792.148 1525.766 2 (3) Rx 10.800 50.000 6791.813 1525.546 10.813 50.400 Tx 11.025 50.800 6792.597 1525.824 6792.263 1525.603 3 Rx 11.000 50.000 6791.928 1525.383 11.013 50.400 Tx 11.175 50.800 6792.683 1525.701 6792.364 1525.460 2(3) Repeated Rx 11.200 50.000 6792.044 1525.219 11.188 50.400 sounding Tx 11.400 50.800 6792.798 1525.538 6792.459 1525.282 3 L=850 Rz 11.400 49.950 6792.118 1525.027 11.400 50.375

Line L K X y Midpoint Midpoint Quality Note K50.600 y X Class K:800 L K Tx 9.975 51.000 6792.155 1526.797 6791.834 1526.557 2 Rx 10.000 50.200 6791.515 1526.315 9.988 50.600 Tx 10.175 51.000 6792.270 1526.633 6791.951 1526.392 2 Rx 10.200 50.200 6791.631 1526.152 1.188 50.600 Tx 10.375 51.050 6792.426 1526.499 6792.086 1526.243 2 (3) Rx 10.400 50.200 6791.746 1525.988 10.388 50.625 Tx 10.575 51.000 6792.501 1526.307 6792.161 1526.051 3 (2) Rx 10.600 50.150 6791.820 1525.796 10.588 50.575 Tx 10.750 51.000 6792.601 1526.163 6792.269 1525.898 3 Tx placement Rx 10.800 50.150 6791.936 1525.633 10.775 50.575 changed,L=850 Tx 10.975 51.000 6792.731 1525.980 6792.428 1525.760 2 (3) Rx 11.000 50.250 6792.133 1525.527 10.988 60.625 Tx 11.175 50.940 6792.798 1525.781 6792.503 1525.558 3 Tx placement Rx 11.200 50.200 6792.207 1525.335 11.188 50.570 changed, L= 7 40 m

Rx=50.190? Tx XY 11.214 50.940 6792.820 1525.750 6792.648 1525.390 3 Rx 11.603 50.243 6792.475 1525.030 11.409 50.592

113209

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Appendix 4

Sampo-profile K50400 ARD-transformation

Vertical Section Broadside

Coil Separation 200 m

Eurajoki - Olkiluoto 30 05 2005

TILT CORRECTION ANGLES Violet numbers- correction angles (in degrees)

LOOPS Green numbers - loop lengths

Black numbers - T-R spacings (in metres) 00200

BASE VALUES Red numbers - base values (in Ohm-m)

TRANSMITTERS (red circle)

MARKED FREQUENCIES 12760.00 6266.00 2480.00 992.10 440.90 60.00

( circle box triangle octagon cross plus )

ARD-scale Scale is logarithm

Resistivity: 2.0 cm equals 1 decade

Common point ofK.KJ and LK systems: X=6791.352 Y=1 526.200 L=IO.OOO K=50.000 X(North)-L rotation angle 35.166 deg.

Geological Survey of Finland PL 96

Belonlmlehenkuja 4

021 51 ESPOO

Finland

Tel. +356 205 50 11

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Appendix 5

SAMPO-PROFILE K50.600 ARD-transformation Vertical section

Broadside Coil separation 200 m

Eurajoki - Olkiluoto 30.5-3.6.2005

Tilt correction angles Violet numbers- correction angles (in degrees)

Loops Green numbers - loop lengths

Base Values Red numbers- base values (in Ohm-m)

Scale Scale is logarithm


Common point ofKKJ and LK systems: X=6791.352 Y=1526.200 L=lO.OOO K=50.000 X(North)-L rotation angle 35.166 deg.

Geological Survey of Finland PL96

Betonimiehenkuja 4 02151 ESPOO

Finland Tel. +358 205 50 11

Appendix 6

113209 Scale 1:5000 100 0 100 200 300

0 0 metres

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o- " o"' o- ~~-~ o- - o«> o"' o- 30052005

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~ ' ' ~ \ \ ' \ \ ' ~ '~ , ~ \ \ \ \ ~ c (red circle) 1 \ . v ; MARKED FREQUENCIES R \ " t. ~ 1 ~~ \ 1276o.oo 6266.oo 2•ao.oo 992.1 o «o.oo 6o_oo '~ ~ ' I\ \ '

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I , L=IO.OOO K=50.000 1 ~ \ \ ~ ~ ~ X(North)-L rotation angle 35.166 deg.

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Copyright Geological Survey of Finland 2005: Red Curves Geological Survey of Finland PL96

2004· Blue Curves Betonimiehenkuja 4 G T K • 02151 ESPOO

· 8/2005 • Finland Pnnted: 16/0 Tel. +358 205 so 11

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Appendix 7



Coil separation 500 m

Eurajokl - Olklluoto 30.5-3.6. 2005

TILT CORRECTION ANGLES Violet numbers- correction angles (In degrees)


Black numbers- T-R spacings (in metres)







Common point ofKKJ and LK systems: X=6791.352 Y=1526.200 L=IO.OOO K=50.000 X(N orth)-L .rotation angle 3 5.166 de g .

Black line is measurement line Calculation point middle

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Finland Tel. +358 205 50 11

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Printed: 16/08/2005

Appendix 8




Eurajoki • Olkiluoto 30.5-3.6. 2005



Black numbers- T-R spacings (in metres)

BASE VALUES Red numbers- base values (in Ohm-m)






Common point ofKKJ and LK systems: X=6791.352 Y=1526.200 L=IO.OOO K=SO.OOO X(North)-L rotation angle 35.166 deg .


+ + + +

+ + + + Rx

IQ I ... l: s: + + + + -

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Betonimlehenkuja 4 02151 ESPOO

Finland Tel. +358 205 50 11

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Appendix 9




Eurajoki- Olklluoto 30.5-3.6. 2005



Black numbers- T-R spaclngs (in metres)







Common point of KKJ and LK systems: X=6791.352 Y=1526.200 L=lO.OOO K=50.000 X(North)-L rotation angle 35.166 deg.


+ + + + + + + + Rx:

Q • x + + + + l

+ + + + -f



Finland Tel. +358 205 50 11

&.) GTK

gefinex 400s (sampo) fm-soundings at olkiluotosampo results have been processed with gtk sampo...

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