Paragraph 1 Table 1
(1)
The Table 1 referred to in paragraph 4 of Part 2 (NORM industrial activities) is—
Table 1
Concentration of radionuclides: NORM industrial activities
| Radionuclide | Solid or relevant liquid concentration in becquerels per gram (Bq/g) | Any other liquid concentration in becquerels per litre (Bq/l) | Gaseous concentration in becquerels per cubic metre (Bq/m3) |
|---|---|---|---|
| U-238secf1 | 0.5 | 0.1 | 0.001 |
| U-238+ | 5 | 10 | 0.01 |
| U-234 | 5 | 10 | 0.01 |
| Th-230 | 10 | 10 | 0.001 |
| Ra-226+ | 0.5 | 1 | 0.01 |
| Pb-210+ | 5 | 0.1 | 0.01 |
| Po-210 | 5 | 0.1 | 0.01 |
| U-235sec | 1 | 0.1 | 0.0001 |
| U-235+ | 5 | 10 | 0.01 |
| Pa-231 | 5 | 1 | 0.001 |
| Ac-227+ | 1 | 0.1 | 0.001 |
| Th-232sec | 0.5 | 0.1 | 0.001 |
| Th-232 | 5 | 10 | 0.001 |
| Ra-228+ | 1 | 0.1 | 0.01 |
| Th-228+ | 0.5 | 1 | 0.001 |
(2)
The Table 1 summation rule in respect of column 2, 3 or 4 means the sum of the quotients A/B where—
(a)
“A” means the concentration of each radionuclide listed in column 1 of Table 1 that is present in the substance or article, and
(b)
“B” means the concentration of that radionuclide specified in column 2, 3 or 4 (as appropriate) of Table 1.
Annotations
Footnotes
- f1
-
For the meaning of ‘sec’ and ‘+’ in this Part, see paragraph 3.