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Table 1 Ghana’s inventory of disused sources (Essel et al. 2011)

From: Numerical modeling of radionuclide migration through a borehole disposal site

Disused low dose sources

Radionuclide

Total initial activity (Bq)

Application

Form

Unit pieces

Cs-137

5.66 × 1012

Level gauges

Sealed

30

Co-60

1.75 × 106

Non-Destructive Testing (NDT)

Sealed

2

Cs-137/Co-60

4.09 × 10°/4.90 × 10-1

-

Sealed

2

Cs-137/Am-241

3.70 × 1011/1.85 × 1012

-

Sealed

3

Cs-137/Am 241:Be

3.00 × 101/ 1.80 × 103

Nuclear gauges

Sealed

1

Am-241

3.50 × 101

Smoke detectors

Sealed

105

Sr-90

1.25 × 104

Thickness gauges

Sealed

33

Ir-192

2.26 × 106

NDT

Sealed

1

Cd-109

6.66 × 102

Research

Sealed

6

Am-241

1.67 × 103

Nuclear gauge

Sealed

1

I-131

6.21 × 109

-

Unsealed

2

Cf-252

2.22 × 1010

-

Sealed

2

Ra-226

7.03 × 109

-

Sealed

19 needles

H-3

3.70 × 107

Nuclear gauge

Unsealed (liquid)

2750 L

C-14

2.60 × 107

-

Unsealed (gas)

7empty cylinders

Disused high dose sources

Co-60

2.78 × 108

Gamma cell-research

Sealed

1

Co-60

1.85 × 108

Teletherapy

Sealed

1

Co-60

2.22 × 108

Food irradiator

Sealed

1

I-129*

4.25 × 1010

-

sealed

1

Fe-59

2.22 × 104

-

sealed

2

Co-57

1.11 × 102

-

sealed

3

Zn-65

n3.70 × 102

-

sealed

1

Sr-89

4.77 × 103

-

sealed

1

Tl-204

7.40 × 10-1

-

sealed

2

P-32

1.18 × 103

Research

Unsealed

4

S-35

9.25 × 10-6/ml

-

Unsealed

5

Ca-45

1.85 × 102

-

Unsealed

3

Na-22

3.7 × 10°

-

Unsealed

4

In-113 m

2.22 × 103

-

Unsealed

12