Abstract:
Heavy ions accelerators are used to simulate the neutron-induced radioactivity by carbon ion at 400Mev in iron (Fe) target and surrounding coolants (sodium-potassium alloy (NaK), lead (Pb), water (H2O), liquid sodium (Na), and carbon dioxide (CO2)). Radionuclides were produced inside the target material and each coolant was evaluated with time by FLUKA Monte Carlo code. All induced elements were evaluated with time through the graph. Neutron yield was measured at 400Mev incident energy. It was observed that low-energyneutrons were the main cause of activation. During the shutdown,56Mn was observed with a high ratio inside the target, and 41Ar, 200Pb, 11C, and24Na contribute the main NaK, Lead, water, carbon dioxide, and liquid sodium respectively to total activity inside coolants. From the start of irradiation to saturation and with elapsed cooling time growth and decay curves for each major induced element were summarized. A large amount of short-lived beta decay radionuclides appeared while the accelerator was shut down, Induced radionuclides with low activity were ignored due to low hazard. For irradiation protection and maintenance of workers, It is judged that Lead (Pb) is the most radiation-contaminated liquid coolant used in nuclear reactors. It needed suitable cooling time after the termination of the operation.
Page(s):
287-287
DOI:
DOI not available
Published:
Journal: Abstract Book on International Conference on Food and Applied Sciences (ICFAS-23) 3-5 August 23, Volume: 0, Issue: 0, Year: 2023
Keywords:
heavy ion accelerators
,
FLUKA
,
coolants
,
neutron activation
,
induced radioactivity