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| The Scottish Abstract of Statistics No 26,1998 |
| Table 10E4 Discharges of radioactive waste to the atmosphere from nuclear sites, 1992-1996 |
| Nature of radioactivity | Annual discharge |
|||||
1992 |
1993 |
1994 |
1995 |
1996 |
||
| From Chapelcross Works | (terabecquerels)1 | |||||
| Tritium | 1,500 |
1,500 |
1,600 |
1,600 |
1,120 |
|
| Sulphur 35 | 0.022 |
0.021 |
0.022 |
0.025 |
0.028 |
|
| Argon 41 | 3,000 |
3,200 |
3,200 |
3,200 |
3,210 |
|
| From Dounreay 2 | (gigabecquerels)3 | |||||
| Alpha emitters (excluding curium 242 and 244) | 0.16 |
0.094 |
0.085 |
0.19 |
0.0287 |
|
| Beta emitters (excluding tritium and krypton 85) | 4 |
2.3 |
2.7 |
7.4 |
1.15 |
|
| Tritium4 | 0.31 |
<0.29 |
<0.029 |
<0.034 |
0.276 |
|
| Krypton 85 4 | 448 |
640 |
647 |
494 |
218 |
|
| Strontium 90 | 0.96 |
0.65 |
0.98 |
2.4 |
0.663 |
|
| Ruthenium 106 | 0.15 |
0.3 |
0.15 |
0.84 |
0.0306 |
|
| Iodine 129 | <0.12 |
<0.081 |
<0.068 |
<0.30 |
0.0206 |
|
| Iodine 131 (organic and inorganic) | 0.021 |
<0.015 |
<0.027 |
<0.020 |
0.0147 |
|
| Caesium 134 | 0.14 |
0.044 |
<0.051 |
0.23 |
0.0051 |
|
| Caesium 137 | 2.23 |
0.085 |
1.48 |
3.7 |
0.177 |
|
| Cerium 144 | 0.44 |
<0.13 |
0.071 |
<0.71 |
0.0163 |
|
| Plutonium 241 | 0.06 |
1.3 |
1.4 |
2.2 |
0.597 |
|
| Curium 242 | 0.017 |
<0.006 |
<0.0032 |
0.1 |
0.00756 |
|
| Curium 244 5 | 0.008 |
<0.0024 |
<0.0032 |
0.014 |
0.0736 |
|
| From Hunterston | (terabecquerels) 1 | |||||
| A Station | Tritium4 | 0.069 |
0.035 |
0.031 |
0.016 |
0.000558 |
| Carbon 14 | 0.043 |
0.015 |
0.037 |
0.032 |
0.00975 |
|
| Sulphur 35 | nd 6 |
na 7 |
na 7 |
na 7 |
na 7 |
|
| Argon 41 | nd 6 |
na 7 |
na 7 |
na 7 |
na 7 |
|
| Beta particulate 8 | 0.0011 |
0.0036 |
0.0025 |
0.0013 |
0.000161 |
|
| B Station | Tritium4 | 2.6 |
4.6 |
2.9 |
5 |
2.18 |
| Carbon 14 | 0.84 |
0.99 |
1.1 |
1.3 |
1.35 |
|
| Sulphur | 0.051 |
0.15 |
0.059 |
0.086 |
0.0788 |
|
| Argon 41 | 21 |
30 |
30 |
55 |
49.5 |
|
| Beta particulate 8 | 0.12 |
0.18 |
0.13 |
0.074 |
0.0356 |
|
| From Torness | (terabecquerels) 1 | |||||
| Tritium4 | 1.3 |
1.7 |
1.7 |
1.3 |
1.26 |
|
| Carbon 14 | 0.35 |
0.55 |
0.49 |
0.49 |
0.571 |
|
| Sulphur 35 | 0.03 |
0.021 |
0.021 |
0.025 |
0.0254 |
|
| Argon 41 | 3.8 |
5 |
8.1 |
7 |
6.99 |
|
| Beta particulate 8 | 0.013 |
0.026 |
0.071 |
0.014 |
0.0148 |
|
Source: HM Industrial Polution Inspectorate (up to 31/3/96 ) and the RIFE report (from 1/4/96) |
| 1 1 terabecquerel = 1012
becquerels. 2 From Dounreay fuel cycle area. 3 1 gigabecquerel = 109 becquerels. 4 For tritium and krypton 85 the unit is terabecquerels. 5 The discharge figures include any curium 243 present. 6 nd: not detected. 7 na: not analysed. 8 For beta particulate the units are gigabecquerels. |
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