TABLE 16

EMISSIONS FROM SECONDARY SOURCES IN CANADA
TO THE GREAT LAKES BASIN BY RADIONUCLIDE
Activity (MBq)


Radionuclide

Half-Life
(days)


Type


1993


1994


1995

45 Ca 163 Patients
Research
Sewer
Total
40
67

107
8.9
0.30
140
149.2
2.7
0.38
360
363.1

57 Co 271 Patients
Sewer
Total
260
23
283
280
41
321
310
38
348

58 Co 70.8 Patients
Sewer
Total
93
0.37
93.4

93
0.37
93.4
93
0.37
93.4
32 P 14.3 Patients
Research
Sewer
Total
7100

8900
16,000
6200
0.088
9600
15,800
7400
0.14
9900
17,300

33 P 25.3 Sewer
Total
42
42
56
56
400
400

35 S 87.2 Research
Sewer
Total

12,000
12,000
0.51
11,000
11,000
0.43
16,000
16,000

51 Cr 27.7 Patients
Research
Sewer
Total
2600

1600
4200
2500
0.054
1000
3500
2000

940
2940

125 I 59.7 Patients
Research
Sewer
Total
16,000

3400
19,400
8400
2.9
3400
11,803
6800
3.0
3900
10,703

131 I 8.04 Patients
Sewer
Total
2.6 10 6
0.71 10 6
3.31 10 6
2.9 10 6
0.73 10 6
3.63 10 6
3.0 10 6
0.65 10 6
3.65 10 6

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