Neutron transport calculation for Activation Evaluation for Decommissioning of PET cyclotron Facility
1 Tokyo Nuclear Services Co. LTD, 1-3-5, Taito, Taito-ku Tokyo, 110-0016, Japan ;
2 KEK, the High Energy Accelerator Research Organization, 1-1 Oho, Tsukuba, Ibaraki , 305-0801 Japan ;
3 Dokkyo Medical. University, 880 Kita-Kobayashi, Mibu-machi, Shimotsuga-gun Tochigi , 321-0293, JAPAN ;
* Corresponding author: email@example.com
Published online: 25 September 2017
In order to evaluate the state of activation in a cyclotron facility used for the radioisotope production of PET diagnostics, we measured the neutron flux by using gold foils and TLDs. Then, the spatial distribution of neutrons and induced activity inside the cyclotron vault were simulated with the Monte Calro calculation code for neutron transport and DCHAIN-SP for activation calculation. The calculated results are in good agreement with measured values within factor 3. Therefore, the adaption of the advanced evaluation procedure for activation level is proved to be important for the planning of decommissioning of these facilities.
© The Authors, published by EDP Sciences, 2017
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