Some Useful Information Concerning the results:

The Conversion factors for the primordial nuclides are given by:

1 Bq 238U/kg = 81 ppb U (81 x 10-9 gU/g)

The 238U decay chain gammas used are:

226Ra: 186.1 keV

214Pb: 295.21 and 351.92 keV

214Bi: 609.31, 1120.29, 1764.49 and 2204.21 keV

The relationships are valid for any daughters in the 238U, 235U or 232Th chain only if the chain is in equilibrium.

1 Bq 232Th/kg = 246 ppb Th (246 x 10-9 gTh/g)

The 232Th decay chain gammas used are:

212Pb: 238.63 and 300.09 keV

208Tl: 583.19 and 2614.53 keV,

228Ac: 911.21 keV

1 Bq 40K/kg = 32300 ppb K (32300 x 10-6 gK/g)

The 40K decay chain gamma used is:

40K: 1460.83 keV

1 Bq 235U/kg = 1.76 ppm U (1.76 x 10-6 gU/g)

The 235U decay chain gammas used are:

235U: 143.76, 163.33 and 205.31 keV

The measurements of the samples below take into account the background measurements. If a measurement is below the background then the upper bound shown is the 90% confidence limit.

CUTE Measurements:

Sample Description

Manufacturer

Mass (g)

Live Time (days)

Counting Dates
(if applicable)

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

CUTE 001

4 Samples each is 1” x 3.75” x 3.75”

904.3 g

13.604

Oct 1, 2018

(mBq/kg)

<0.45 ppb

9.73

12.67

0.22

0.60

<0.54

<6.37

<0.369

<0.15

HDPE Sheet SR Natural Cube

Oct 15, 2018

(ppb or ppm)

<36.81 ppt

0.79 ppb

1.03 ppb

0.38 ppb

1.06 ppb

<0.14 ppb

<205.70 ppb

CUTE 002

Sample Plates are 9.5 x 9.0 x 0.5 cm

1022.6 g

6.799

Oct 15, 2018

(mBq/kg)

<0.79

53.55

37.73

2.16

1.33

0.22

0.86

<15.12

<0.54

8.50

0.98

54Mn Signal:

SAS Stainless Steel Drywell Plates

Oct 22, 2018

(ppb or ppm)

<64.08 ppt

4.34 ppb

3.06 ppb

3.81 ppb

2.35 ppb

0.05 ppb

0.21 ppb

<488.45 ppb

1.83 mBq/kg

0.66 mBq/kg

CUTE 003

Sample Plates are 9.5 x 9.0 x 0.5 cm

1024.1 g

6.125

Nov 2, 2018

(mBq/kg)

<0.89

<53.85

<1.73

<0.50

<8.38

<0.58

8.57

1.04

54Mn Signal:

SAS Stainless Steel Drywell Plates

These plates have welds

Nov 8, 2018

(ppb or ppm)

<72.05 ppt

<4.36 ppb

<3.05 ppb

<0.12 ppb

<270.64 ppb

0.90 mBq/kg

0.64 mBq/kg

CUTE 004

FA 412 Lead
(low activity lead)
2” x 2” x 0.2”

242.5 g

13.972

Jan 15, 2019

(mBq/kg)

1.85

1.76

16.82

71.02

10.13

11.68

17.46

3.30

<15.73

<1.23

<0.21

210Po:

<116200.00

Lead Disk

Fonderie de Gentilly

Jan 30, 2019

(ppb or ppm)

0.15 ppb

0.14 ppb

1.36 ppb

5.75 ppb

17.83 ppb

20.56 ppb

4.3 ppb

0.81 ppb

<508.08 ppb

<9.41 ppm

Additional Activities:

(mBq/kg)

228Ac:

<2.33

(ppb or ppm)

(Not in Equilibrium with other Th daughters)

<0.57 ppb

CUTE 005

TFA 393 Lead
(very low activity lead)
4” (d) x 0.2” (th)

221.6 g

23.812

Aug 1, 2019

(mBq/kg)

0.95

1.21

<60.36

<11.19

<2.72

5.72

11.69

<1.17

<0.63

210Po:

<43780.00

Lead Disk

Fonderie de Gentilly

Aug 26, 2019

(ppb or ppm)

0.08 ppb

0.1 ppb

<4.89 ppb

<19.69 ppb

<0.67 ppb

184.72 ppb

377.59 ppb

<3.55 ppm

CUTE 006

1-Bromo-3-Chloro-5,5-Dimethylimidazolidine-2,4-Dione

999.9 g

6.000

Apr 23, 2019

(mBq/kg)

8.42

1.25

11.39

30.07

<2.90

2.51

1.04

19.44

9.71

<1.13

<0.60

BROM-N-8 Tablets

Mursatt Chemicals Ltd, Woodbridge ON, Canada

Apr 29, 2019

(ppb or ppm)

0.68 ppb

0.1 ppb

0.92 ppb

2.44 ppb

<5.1 ppb

0.62 ppb

0.26 ppb

627.82 ppb

313.7 ppb

CUTE 007

Ultra Pure Water and Other Things

968.43 g

8.625

Mar 20, 2019

(mBq/kg)

17.45

1.31

<30.48

0.57

0.48

1.82

0.78

11.47

7.21

<0.67

<0.39

Water Sample from CUTE Shielding Tank

Mar 29, 2019

(ppb or ppm)

1.41 ppb

0.11 ppb

<2.47 ppb

1 ppb

0.85 ppb

0.45 ppb

0.19 ppb

370.55 ppb

232.95 ppb

CUTE 008

Copper Disk Cut Into Four Quarters

3242.4 g

20.499

Apr 26, 2021

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

Copper Sheet Material

May 17, 2021

(mBq/kg)

<0.27

<9.23

<0.47

<0.22

<3.88

<0.48

<0.10

Run: 210426
210429

(ppm / ppb / ppt)

<21.87 ppt

<0.75 ppb

<0.83 ppb

<54.12 ppt

<125.32 ppb

Results:

7Be:

54Mn

228Ac:

57Co

58Co

(mBq/kg)

<2.98

<0.18

<0.38

0.90

0.79

1.35

0.22

(ppm / ppb / ppt)

<93.48 ppt

CUTE 009

M16 Brass

51.0 g

11.673

Jun 11, 2021

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

Brass Screws and Nuts

Five bags of parts, there are 100 parts in each bag

Run: 210611

Jun 23, 2021

(mBq/kg)

7.12

4.00

<155.60

<2.50

<7.08

<87.59

<5.63

<1.84

(ppm / ppb / ppt)

0.58 ppb

0.32 ppb

<12.6 ppb

<4.4 ppb

<1.74 ppb

<2.83 ppm

Results:

7Be:

54Mn

228Ac:

57Co

58Co

(mBq/kg)

<42.57

3.07

2.02

<5.66

<6.66

1.91

1.75

(ppm / ppb / ppt)

<1.39 ppb

CUTE 010

OSA #905 – UPW batch from CUTE batch before leaching – Case #0002

1054.4 g

13.687

Feb 11, 2022

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

Ultra Pure Water

Run: 220211
220222

Feb 25, 2022

(mBq/kg)

0.95

0.35

<9.84

0.15

0.21

0.42

<3.96

<0.36

<0.14

(ppm / ppb / ppt)

0.08 ppb

0.03 ppb

<0.8 ppb

0.26 ppb

0.37 ppb

0.05 ppb

0.1 ppb

<127.91 ppb

Results:

7Be:

54Mn

228Ac:

(mBq/kg)

<2.91

<0.23

0.03

0.46

(ppm / ppb / ppt)

0.01 ppb

0.11 ppb

CUTE 011

OSA #905 – UPW case #2, First leach (2 weeks)

992.3 g

13.868

Mar 11, 2022

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

Ultra Pure Water

Run: 220311

Mar 25, 2022

(mBq/kg)

0.11

0.32

<8.66

<0.23

0.25

0.43

<6.46

<0.451

<0.071

(ppm / ppb / ppt)

9.06 ppt

25.66 ppt

<0.7 ppb

<0.4 ppb

0.06 ppb

0.1 ppb

<0.21 ppm

Results:

7Be:

54Mn

228Ac:

(mBq/kg)

<3.94

<0.18

0.30

0.56

(ppm / ppb / ppt)

0.07 ppb

0.14 ppb

CUTE 012

OSA #905 – UPW second rinse (2 weeks)

998.6 g

9.646

Mar 25, 2022

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

Ultra Pure Water

Run: 220325

Apr 4, 2022

(mBq/kg)

1.45

0.47

<18.03

0.15

0.25

<0.57

<12.19

<0.55

<0.13

(ppm / ppb / ppt)

117.53 ppt

38.3 ppt

<1.46 ppb

0.26 ppb

0.44 ppb

<0.14 ppb

<0.39 ppm

Results:

7Be:

54Mn

228Ac:

(mBq/kg)

<3.86

<0.14

<0.93

(ppm / ppb / ppt)

<0.23 ppb

CUTE 013

OSA #905 – UPW Leach water at 4 week mark

986.4 g

9.833

Apr 4, 2022

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

Ultra Pure Water

Run: 220404

Apr 14, 2022

(mBq/kg)

<0.52

5.38

10.53

<0.31

<0.75

5.03

5.04

<0.56

<0.12

(ppm / ppb / ppt)

<42.12 ppt

0.44 ppb

0.85 ppb

<0.55 ppb

<0.18 ppb

162.45 ppb

162.76 ppb

Results:

7Be:

54Mn

228Ac:

(mBq/kg)

<1.62

<0.26

0.45

0.69

(ppm / ppb / ppt)

0.11 ppb

0.17 ppb

CUTE 014

OSA #905 – UPW second rinse (4 weeks)

977.3 g

10.798

Apr 14, 2022

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

Ultra Pure Water

Run: 220414

Apr 25, 2022

(mBq/kg)

0.37

0.39

<12.63

<0.59

<1.06

2.14

4.69

<0.36

<0.068

(ppm / ppb / ppt)

29.96 ppt

31.55 ppt

<1.02 ppb

<1.04 ppb

<0.26 ppb

69.1 ppb

151.39 ppb

Results:

7Be:

54Mn

228Ac:

(mBq/kg)

<3.33

<0.11

<0.58

(ppm / ppb / ppt)

<0.14 ppb

CUTE 015

5.6 g

13.784

May 17, 2022

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

Coax Stainless Steel Connector

Run: 220517

May 31, 2022

(mBq/kg)

<18.87

276.10

727.30

<19.30

<29.41

314.37

334.60

<24.43

<10.06

(ppm / ppb / ppt)

<1.53 ppb

22.36 ppb

58.91 ppb

<33.97 ppb

<7.23 ppb

10.15 ppm

10.81 ppm

Results:

7Be:

54Mn

228Ac:

(mBq/kg)

<231.50

6.99

10.03

<64.68

(ppm / ppb / ppt)

<15.91 ppb

CUTE 016

257.8 g

6.312

Sep 16, 2022

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

133Ba SRS-22-001-A Rinse Solution

Run: 220916
220919
22091901
220920

Sep 23, 2022

(mBq/kg)

<2.00

<64.04

<1.53

5.58

3.29

<21.44

<4.55

<0.41

(ppm / ppb / ppt)

<0.16 ppb

<5.19 ppb

<2.69 ppb

1.37 ppb

0.81 ppb

<692.51 ppb

Results:

7Be:

54Mn

228Ac:

133Ba:

(mBq/kg)

<17.74

<0.76

3.43

3.61

117.43

10.31

(ppm / ppb / ppt)

0.84 ppb

0.89 ppb

CUTE 017

Sample collected on Sep 20, 2024

971.0 g

6.326

Sep 25, 2024

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

Water from CUTE tank Pre-Treatment

Run: 240925
240930

Oct 2, 2024

(mBq/kg)

1.19

0.61

<15.74

<0.33

6.09

1.01

<11.37

<0.51

<0.17

(ppm / ppb / ppt)

96.55 ppt

49.41 ppt

<1.27 ppb

<0.58 ppb

1.5 ppb

0.25 ppb

<0.37 ppm

Results:

7Be:

54Mn

228Ac:

(mBq/kg)

<2.40

<0.53

<0.24

(ppm / ppb / ppt)

<0.06 ppb

CUTE 018

Sample collected on Sep 20, 2024

931.8 g

6.826

Oct 2, 2024

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

Water from CUTE tank Post-Treatment

Run: 241002
24100201

Oct 9, 2024

(mBq/kg)

1.30

0.58

<30.89

0.10

0.32

<0.64

8.38

6.83

<0.17

<0.15

(ppm / ppb / ppt)

105.06 ppt

46.83 ppt

<2.5 ppb

0.18 ppb

0.56 ppb

<0.16 ppb

270.76 ppb

220.61 ppb

Results:

7Be:

54Mn

228Ac:

(mBq/kg)

<2.38

<0.20

<1.38

(ppm / ppb / ppt)

<0.34 ppb

CUTE 019

Sample collected on Sep 23, 2024

981.7 g

6.847

Oct 9, 0204

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

Water from CUTE tank Pre-Disinfection

Run: 241009

Oct 16, 2024

(mBq/kg)

2.00

0.58

<21.47

<0.50

<1.30

4.87

6.32

<0.29

<0.097

Pre-Recirculation

(ppm / ppb / ppt)

162.32 ppt

47.03 ppt

<1.74 ppb

<0.88 ppb

<0.32 ppb

157.25 ppb

204.23 ppb

Results:

7Be:

54Mn

228Ac:

(mBq/kg)

<2.76

<0.37

<1.40

(ppm / ppb / ppt)

<0.34 ppb

CUTE 020

Sample collected on Sep 23, 2024

1003.5 g

7.861

Oct 16, 2024

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

Water from CUTE tank Post-Disinfection

Run: 241016

Oct 24, 2024

(mBq/kg)

0.18

0.44

<13.10

0.40

0.30

<0.54

7.14

5.84

<0.29

<0.16

Post-Recirculation

(ppm / ppb / ppt)

14.37 ppt

35.92 ppt

<1.06 ppb

0.71 ppb

0.52 ppb

<0.13 ppb

230.64 ppb

188.6 ppb

Results:

7Be:

54Mn

228Ac:

(mBq/kg)

<3.22

0.19

0.21

<0.78

(ppm / ppb / ppt)

<0.19 ppb

In Progress and To Be Measured:

Sample Description

Manufacturer

Mass (g)

Live Time (days)

Counting Dates
(if applicable)

Next Sample

Queue: Empty

Results:

238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co

Comments

(mBq/kg)

(ppm / ppb / ppt)

Results:

7Be:

54Mn

228Ac:

(mBq/kg)

(ppm / ppb / ppt)