**8.1.8**

In radiation safety aspects it is important to notice that radiation protection is not a solely part body but a team work . Everybody in the facility must be involved in Radiation Protection (RP) tasks and in the Radiation Safety (RS) Program and must be accomplish this minimal recommendations:

RADIATION PROTECTION BASIC RECOMMENDATIONS: (EXAMPLE)


One of the most relevant issues in Cyclotron facility is the activation of the materials inside the cyclotron room during daily operation. As cyclotron room is a close and hardly shielded facility all activation products will ever be contained inside its room and the activation levels will only be monitored and measured during providers maintenances, in this opportunity, frotis are taken of the most suitable materials to be activated and they are measure in spectrometer. On the other hand, gaseous activation is continuously monitored with proper devices set inside the chimney. As first defense line, the facility has a 200 m circuit through which gaseous particles travel during 24 hours before getting into the chimney to be release to the atmosphere. As our cyclotron do not have gaseous target all the airborne particles come from the air inside the room, so they are characterized by their extremely short half lives, around nano or micro seconds. Periodcally, frotis are taken from

For any maintenance that need the "backdoor" of the cyclotron to be removed, exposition rate must be below 0.5 mR/h as it is establish in NVC2259. If it is not, maintenance

Finally, it must be said that in operation conditions Cyclotron is fully shielded allowing a maximum of 10 mSv at 1 m in the axial direction of the magnet, and such a value is only reached one or twice a day in the production time that is less than 2 hours accounting all

*In Pet studies a cyclotron is nothing without radiochemical laboratory* , because cyclotron only produce the ion, in our case, 18F and it has to be joined to the glucose analogue molecule (fluordexoxiglucose) to be driven to the body. In it fluor is send into molecule via electrophilic fluorination or nucleophilic fluorination reaction in which stable fluor is

Fig. 11. Synthesis Lab in Venezuelan Cyclotron facility (courtesy Dorly Coehlo)

**8.1.8.4 Parasite Activation** 

the running.

**8.2 Synthesis laboratory** 

substitute by the activated 18F.

the chimney to be measure in spectrometer.

personnel must wait until this level is reached.

