 |
 |
 |
 |
|
|
|
|
| The Scottish Abstract of Statistics No 26,1998 |
| Table 10E3 Discharges of liquid radioactive waste from nuclear sites, 1992-1996 |
| Nature of radioactivity | Annual discharge |
|||||
1992 |
1993 |
1994 |
1995 |
1996 |
||
| From Chapelcross Works | (terabecquerels)1 | |||||
| Tritium | 0.7 |
0.5 |
0.49 |
0.5 |
0.368 |
|
| Alpha emitters | 0.0002 |
0.0005 |
0.0008 |
0.0007 |
0.00122 |
|
| Beta emitters (excluding tritium) | 0.071 |
0.27 |
0.31 |
0.16 |
0.111 |
|
| From Dounreay | (terabecquerels)1 | |||||
| Alpha emitters (excluding curium 242) | 0.026 |
0.099 |
0.1 |
0.086 |
0.071 |
|
| Beta emitters (excluding tritium) | 6.4 |
8 |
9 |
7 |
6.28 |
|
| Tritium | 2.9 |
1 |
3.2 |
1.1 |
2.03 |
|
| Cobalt 60 | 0.025 |
<0.019 |
<0.01 |
<0.027 |
0.035 |
|
| Strontium 90 | 1.8 |
1.4 |
1.6 |
0.6 |
0.587 |
|
| Zirconium 95 + Niobium 95 | <0.012 |
<0.015 |
<0.012 |
<0.13 |
0.127 |
|
| Ruthenium 106 | 0.5 |
<0.81 |
0.35 |
0.76 |
1.78 |
|
| Silver 110m | <0.0060 |
<0.0073 |
<0.0068 |
<0.0060 |
0.014 |
|
| Caesium 137 | 3.1 |
3.8 |
4.7 |
3.7 |
4.61 |
|
| Cerium 144 | <0.024 |
<0.092 |
<0.026 |
<0.033 |
0.03 |
|
| Plutonium 241 | 0.044 |
1.3 |
0.94 |
0.55 |
0.356 |
|
| Curium 242 | 0.00094 |
<0.0013 |
<0.0007 |
<0.0065 |
0.0006 |
|
| From Hunterston | (terabecquerels)1 | |||||
| A Station | Tritium | 0.17 |
0.36 |
0.2 |
0.041 |
0.0229 |
| Total alpha + beta (excluding tritium) | 0.21 |
0.29 |
0.21 |
0.15 |
0.141 |
|
| B Station | Tritium | 245 |
362 |
423 |
449 |
399 |
| Sulphur 35 | 1.7 |
2.1 |
1.5 |
1.7 |
1.37 |
|
| Cobalt 60 | na 2 |
na 2 |
na 2 |
na 2 |
0.0019 |
|
| Total alpha + beta (excluding tritium and sulphur 35) | 0.02 |
0.034 |
0.031 |
0.023 |
0.0041 3 |
|
| From Torness | (gigabecquerels)4 | |||||
| Tritium5 | 250 |
235 |
220 |
270 |
298 |
|
| Sulphur 355 | 0.048 |
0.021 |
0.019 |
0.042 |
0.044 |
|
| Cobalt 60 | 3.5 |
1.4 |
0.26 |
0.67 |
0.502 |
|
| Total beta (excluding tritium, sulphur 35 and cobalt 60) | 11 |
8.4 |
1.2 |
1.6 |
1.3 |
|
| Total alpha | <0.014 |
<0.012 |
0.008 |
<0.009 |
0.0058 |
|
Source:HM Industrial Pollution Inspectorate (up to 31/3/96) and the RIFE report (from 1/4/96) |
| 1 1 terabecquerel = 1012
becquerels. 2 na = not analysed. 3 Also excludes Cobalt 60. 4 1 gigabecquerel = 109 becquerels. 5 For Tritium and Sulphur 35 figures are in terabequerels. |
|
|
|