INAA of Chlorine
Written and developed by Prof. Tor Bjørnstad (IFE/UiO)
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The exercise will consist of two main parts:
- Thermal INAA of total chlorine in organic solutions using HpGe gamma spectroscopy.
- Lectures/demonstrations in the 4 application areas radiopharmacy, radioecology, radioactive waste management and reactor operations.
The students are divided first into two groups. Each group follows the procedure below.
- The NAA laboratory is inside a barrier. Accordingly, students have to observe and adapt the following procedure:
- All participants have to bring personal dose-meters and a lab-coat.
- Put on lab-coat and dose-meter on the outside of the barrier.
- Put on shoe cover (plastic) according to the demonstrations of the laboratory assistant and enter into the “hot” side of the barrier. Bring a minimum of papers into the laboratory.
- The NAA laboratory facility, which originally consists of 3 wet-chemistry labs and 2 instrument labs, has temporarily only available 1 wet-chemistry lab and 1 instrument lab. All sample preparation, including sample transfer to and from the reactor, is performed in the chemistry lab. As soon as the sample is irradiated, prepared and ready for detection, it is transferred to the instrument, or counting lab.
- Detection will be carried out with an HpGe detector coupled to common nuclear electronics and a PC-operated MCA based on the Maestro-program from Ortec.
- It is important that the students strictly follow the instructions from the lab.-assistant(s) and not operate on “their own”.
- When the practical tasks in the laboratory is finished, it is time to leave the NAA-laboratory. Collect your belongings and follow the procedure:
- Go to the wardrobe with the barrier
- Check your hands and lab-coat for contaminations with a contamination monitor.
- Take off the lab-coat and place it in a designed plastic bag.
- Wash your hands
- Remove the shoe plastic cover according to demonstration by the lab-assistant.
- Enter the non-radioactive side of the barrier.
- Carry out all calculations in the assigned conference room.