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.
REPAIR Measurements:




























Sample Description Manufacturer Mass (g) Live Time (days) Run Numbers Counting Dates
(if applicable)






















REPAIR G01 SST Sensing Ltd 158.4 g 1.005 260619 Jun 19, 2026 Results:
238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co
Comments
Zirconium Oxygen Sensor PN: 02S-FR-T2-18BM-A



(mBq/kg) 458.00 +- 28.76 534.30 +- 137.80 19.64 +- 5.39 362.20 +- 28.06 1050.20 +- 181.00 <13.78

<7.51






Efficiency Corrections Not Applied
(ppb or ppm) 37.1 ppb +- 2.33 ppb 43.28 ppb +- 11.16 ppb 34.57 ppb +- 9.49 ppb 89.1 ppb +- 6.9 ppb 33.92 ppm +- 5.85 ppm














Results: 210Pb:
7Be:

54Mn

228Ac:
















(mBq/kg) <135.10

<41.68

<9.17

374.70 +- 42.86
















(ppb or ppm) <10.94 ppb







92.18 ppb +- 10.54 ppb











In Progress and To Be Measured:




























Sample Description Manufacturer Mass (g) Live Time (days) Run Numbers Counting Dates
(if applicable)






















REPAIR G01 SST Sensing Ltd 158.4 g 1.005 260619 Jun 19, 2026 Results:
238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co
Comments
Zirconium Oxygen Sensor PN: 02S-FR-T2-18BM-A



(mBq/kg) 458.00 +- 28.76 534.30 +- 137.80 19.64 +- 5.39 362.20 +- 28.06 1050.20 +- 181.00 <13.78

<7.51






Efficiency Corrections Not Applied
(ppb or ppm) 37.1 ppb +- 2.33 ppb 43.28 ppb +- 11.16 ppb 34.57 ppb +- 9.49 ppb 89.1 ppb +- 6.9 ppb 33.92 ppm +- 5.85 ppm














Results: 210Pb:
7Be:

54Mn

228Ac:
















(mBq/kg) <135.10

<41.68

<9.17

374.70 +- 42.86
















(ppb or ppm) <10.94 ppb







92.18 ppb +- 10.54 ppb











Next Sample




Results:
238U from 226Ra

238U from 234Th

235U

232Th

40K

137Cs

60Co
Comments






(mBq/kg)



























(ppb or ppm)







.




















Results: 210Pb:
7Be:

54Mn:

228Ac:
210Po:














(mBq)





























(ppb or ppm)