Appendix 21 - System of work for entry into a 'Controlled Area'
System of work for the use of the following workers:
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The 'Controlled Area' may be sued by the above named workers for the purposes of keeping and using radioactive substances subject to the following conditions:
1. Permission to enter is obtained from all other workers presently operating in the 'Controlled area';
2. On entering the area, a radiation survey is performed in order to verify that (i) the radiation dose rate does not exceed 7.5 microSv hr-1 (<20 cps on a Mini monitor with an end window Geiger-Muller tube) and (ii) the working surface to be used has no unfixed contamination;
3. That only one radioisotope is involved and that the quantity of stock solution and the quantity to be dispensed and used do not exceed the values given below;
| Radionuclide | 3H | 14C | 32P | 35S | 86Rb | 125I |
| Stock Solution
Max. Activity (MBq) |
200 |
200 |
50 |
200 |
50 |
5 |
| Dispensed Aliquot
Max. Activity (MBq) |
100 |
50 |
5 |
50 |
5 |
5 |
4. All manipulations are carried out in accordance with the School/Unit local rules and any instructions specified below.
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Signed ......................................................................... (DRPS) Date ............................................