CFM In-situ Tracer Test (CFM RUN 02-02RN) 2012

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
Sven, Tom, Thorsten, Karam – final inspection before the CFM Tracer Test started

Ready for sampling
Ready for sampling

Sven, Tom, Thorsten, Karam – final inspection before the CFM Tracer Test started Careful dismantling of CFM tracer tank
Careful dismantling of CFM tracer tank

Lead-shielded tracer tank
Lead-shielded tracer tank

Final destination of the lead-shielded tank in the injection cabinet
Final destination of the lead-shielded tank in the injection cabinet

Preparation of auto sampler
Preparation of auto sampler

and start of the CFM tracer injection…
and start of the CFM tracer injection…

.. before closing the injection cabinet doors.
.. 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)
h

dilution factor 100 Bq/L

max. activity per 250mL after 42 days

n=89 samples à 250mL without sorption

conc. Expected ng/L [ppt]

Na-22

2.00E+06

1.94E+06

8.62E+03

2.16E+03

1.92E+05

0.01

Ba-133

2.52E+06

2.50E+06

1.11E+04

2.78E+03

2.47E+05

0.21

Cs-137

9.00E+05

8.98E+05

3.99E+03

9.97E+02

8.88E+04

0.24

Np-237

1.30E+02

1.30E+02

5.78E-01

1.44E-01

1.29E+01

6.27

Am-243

3.60E+02

3.60E+02

1.60E+00

4.00E-01

3.56E+01

0.01

Pu-242

2.00E+02

2.00E+02

8.89E-01

2.22E-01

1.98E+01

0.76

Th-232

8.50E-03

8.50E-03

3.78E-05

9.44E-06

8.41E-04

1.14

Colloid Formation and Migration Experiment

The GTS underground facilities are also available to interested 3rd parties for underground testing and research. The GTS offers cost-effective access to a fully developed, well characterised underground research facility with round the year logistical support - please contact Dr. Ingo Blechschmidt, Head of the Grimsel Test Site, for further details.
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