17.08.2015   IAEA RADIATION TECHNOLOGY SERIES No

Experimental parameters used at each participating laboratory

Table 18 lists the experimental parameters used in different laboratories.

TABLE 17. SALINE WATER COMPOSITIONS

Series 3: Artificial Gullfaks formation water, Series 4: Tordis produced water

salts dissolved in distilled tap water (samples have been in contact with live oil)

NaCl

41.04 g/L

Na+

12 400 ppm

KCl

0.635 g/L

K+

230 ppm

MgCl2-6H2O

2.546 g/L

Ca2+

800 ppm

Na2SO4

0.047 g/L

Mg2+

175 ppm

NaHCO3

0.212 g/L

Ba2+

30 ppm

Sr2+

150 ppm

Cl-

21 000 ppm

so2-

23 ppm

TABLE 18. EXPERIMENTAL PARAMETERS USED AT THE DIFFERENT LABORATORIES ON COMPLETION OF THE ROUND ROBIN TEST

Brazil, CDTN Radiochemistry Laboratory

Sample treatment:

1A-3E: No treatment, 4A-4E: Distillation

Calibration:

Dilutions from NIST SRM 4926E, 3 Sept 1998

Equipment/method:

Quantulus 1220, 22 mL PE vials

Scintillation cocktail:

Optiphase HighSafe III, C/W = 12/10

Counting time:

12 x 10 min = 120 min

Background coun trate:

1.89 ± 0.49 cpm

Indonesia, Hydrology and Geothermic Laboratory Center for the Application of Isotope and Radiation Technology, National Nuclear Energy Agency

Sample treatment:

Distillation of all samples

Calibration:

Dilutions from NIST SRM 4926D-11, 25 July 1989

Equipment/method:

Packard 1900 TR, PP vials

Scintillation cocktail:

Ultimo Gold, C/W = 11/10

Counting time:

720 min

Background count rate:

2.98 ± 0.29 cpm

China, Industrial Application of Radioisotopes, China Institute of Atomic Energy

Sample treatment:

All samples filtered with 0.45 |im filter. No distillation

Calibration:

H-3 Standard Sample Series, National Institute of Metrology

Equipment/method:

Wallac 1414, Win Spectral, PP vials

Scintillation cocktail:

Optiphase HighSafe III, C/W = 2/1

Counting time:

60 min

Background count rate:

8 cpm

Argentina, Porous Media Group, Comahue National University

Sample treatment:

Distillation of all samples

Calibration:

No direct calibration. Based on internal non-quenched spectra and measured quenching parameters

Equipment/method:

Wallac 1414, Win Spectral, PP vials

Scintillation cocktail:

Optiphase HighSafe II, C/W=16/4

Counting time:

90 min

Background countrate:

34 cpm

Vietnam, Centre for Applications of Nuclear Technique in Industry, NRI

Sample treatment:

A1-E2: No treatment. 3A-4E: Both with and without distillation

Calibration:

No direct calibration. Based on internal non-quenched spectra and measured quench curves

Equipment/method:

Packard TriCarb 2900TR

Scintillation cocktail:

Instagel Plus, C/W = 12/8

Counting time:

90 min

Background count rate:

12 cpm

Pakistan, Radioisotope Hydrology Laboratory, Pakistan Institute of Nuclear Science and Technology

Sample treatment:

A1-2E: No treatment. 3A-3E: Distilled, 4A-4E: Filtered and distilled

Calibration:

NIST SRM 4926D-15, 3 September 1998

Equipment/method:

Packard TriCarb 3170, 22 mL PE vials

Scintillation cocktail:

Ultima Gold, C/W = 12/8

Counting time:

10 x 50 min

Background count rate:

1.1 cpm

Norway, Department for Reservoir and Exploration Technology, Institute for Energy Technology

Sample treatment:

1A-3E: Filtering (0.45 pm), 4A-3E: Filtering and distillation

Calibration:

Wallac and Packard secondary standard tablets (with expiring date). Check with internal quench parameters and with addition of internal standard

Equipment/method:

Quantulus 1220, 22 mL PP vials

Scintillation cocktail:

Ultima Gold, C/W = 12/8

Counting time:

3 h

Background count rate:

Undistilled blank: 2.1 ± 0.5 cpm, distilled blank 1.8 ± 0.5 cpm