Appendix 20 - The maximum permitted activity of unsealed radionuclides which may be stored/used at one time
NOTE: All radioactivity must be stored in a locked cabinet or room.
The activity of a radionuclide given under STORAGE is the cumulative total and must never be exceeded. The maximum activity of a radionuclide stored in an individual vial must never exceed the activity for that nuclide given under USAGE.
Where more than one radionuclide is involved, the Quantity Ratio must be used. This ratio is derived from the equation
Qp
Sum of ------
Qlim
Qp = Quantity of radionuclide present
Qlim = Quantity of the radionuclide specified in this table
NOTE: The quantity ratio must NOT exceed 1
| Storage |
Usage |
||
| Radionuclide |
Supervised Area (MBq) |
Supervised Area (MBq) |
Teaching Laboratory
(MBq) |
| 3-H |
1000 |
100 |
20 |
| 14-C |
500 |
50 |
10 |
| 22-Na |
50 |
5 |
1 |
| 24-Na |
50 |
5 |
1 |
| 32-P |
50 |
5 |
1 |
| 33-P |
500 |
50 |
10 |
| 35-S |
500 |
50 |
10 |
| 36-Cl |
50 |
5 |
1 |
| 45-Ca |
50 |
5 |
1 |
| 51-Cr |
500 |
50 |
10 |
| 59-Fe |
50 |
5 |
1 |
| 63-Ni |
50 |
5 |
1 |
| 65-Zn |
50 |
5 |
1 |
| 86-Rb |
50 |
5 |
1 |
| 125-I |
10 |
5 |
0.1 |