CFM site-preparation was finalised for the hot migration experiment (CFM RUN 12-02RN) and the first “hot” experiment started in the frame of the CFM project on 29th of February 2012. The tracer cocktail was delivered on 29th in the afternoon and injection started at 8pm at the same day. For the proceeding day and night, shifts were organised to develop a comprehensive data set from the tracer injection test. For a description on the input parameters of the injection please see below.
Sven, Tom, Thorsten, Karam – final inspection before the CFM Tracer Test started
Ready for sampling
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Careful dismantling of CFM tracer tank
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Lead-shielded tracer tank
Final destination of the lead-shielded tank in the injection cabinet
Preparation of auto sampler
and start of the CFM tracer injection…
.. before closing the injection cabinet doors.
GTS Phase VI - CFM Project : Radionuclide – Colloid/Conservative Tracer Test _Run CFM 12-02RN
| Input Parameters | |
| Injection/recirculation borehole: | CFM 06.002 |
| Recirculation flow rate: | 20 ml/min |
| Injection flow rate: | 0.33 ml/min |
| Tracer cocktail: | Conservative tracer amino-G acid, Colloids and radionuclides according to Table 1 |
| Concentration: amino-G: | 4.5 mg giving 1500 ppb in the total circulation loop |
| Extraction point: | Pinkel |
| Extraction flow rate | 25 ml/min |
| Gradient: | 57.35 mm / 6.08 m |
| Extraction water analysis: | Colloid using the LIBD from KIT, conservative tracer using fluorometer customised for amino-G acid detection, radionuclide using samples taken by the automatic sampler |
| Sampling | 500 ml samples according to defined schedule taken by the automatic sampler |
| Layout for sampling: | Normal flow direction from extraction surface cabinet to waste tank. The line has an electro-switch valve to allow water path switch to the automatic sampler when sampling is activated. The line has also a second manual switch valve to the LIBD when colloid samples are analysed |
|
Nuclide |
Activity in sample t(0) |
C(t=42d) |
dilution factor 100 Bq/L |
max. activity per 250mL after 42 days |
n=89 samples à 250mL without sorption |
conc. Expected ng/L [ppt] |
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Na-22 |
2.00E+06 |
1.94E+06 |
8.62E+03 |
2.16E+03 |
1.92E+05 |
0.01 |
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Ba-133 |
2.52E+06 |
2.50E+06 |
1.11E+04 |
2.78E+03 |
2.47E+05 |
0.21 |
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Cs-137 |
9.00E+05 |
8.98E+05 |
3.99E+03 |
9.97E+02 |
8.88E+04 |
0.24 |
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Np-237 |
1.30E+02 |
1.30E+02 |
5.78E-01 |
1.44E-01 |
1.29E+01 |
6.27 |
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Am-243 |
3.60E+02 |
3.60E+02 |
1.60E+00 |
4.00E-01 |
3.56E+01 |
0.01 |
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Pu-242 |
2.00E+02 |
2.00E+02 |
8.89E-01 |
2.22E-01 |
1.98E+01 |
0.76 |
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Th-232 |
8.50E-03 |
8.50E-03 |
3.78E-05 |
9.44E-06 |
8.41E-04 |
1.14 |
Colloid Formation and Migration Experiment
