Detailed procedures for operations before, during and after injection should be described in the technical safety report. Some of the important points to be considered for radiation safety at an injection site involve:

• Informing well site personnel about the nature of the work to be done. In the case of radiotracers, explanations should be given in some detail, especially with regard to contamination/decontamination, radiation risks, doses etc.

• Preparing the injection site, setting up the equipment and connecting to the injection pipeline. In the case of injection against high pressure (several hundred bars), all connection points have to be leak tested before starting to pump the radiotracer solution. The injection area has to be cordoned off and signs displayed in order to deter unauthorized persons from entering.

• Ensuring that all operational personnel wear suitable protective clothing and personal dosimeters.

• Preparing monitoring and decontamination equipment to handle potential spills and leakages according to the written procedures.

• Flushing pure injection water through the injection apparatus and connected equipment for an extended period (~1 h) to clean out any traces of the radiotracer before disconnecting injection equipment.

• In the case of any leakages, performing the planned and prepared-for decontamination operation and enclosing any contaminated parts in suitable plastic bags for transportation back to radiotracer company’s premises for further decontamination.

• As a final check of the injection site before leaving, carrying out sweep tests for on-site analysis with relevant nuclear detection equipment.

• Finally, collecting urine samples from all personnel present during injection for subsequent laboratory analysis for any ingested or inhaled activity.