Sample design and gamma-ray counting strategy of neutron activation system for triton burnup measurements in KSTAR
| Autor: | Jungmin Jo, Mun Seong Cheon, Yong-Seok Hwang, Kyoung-Jae Chung |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Neutron transport
Materials science Astrophysics::High Energy Astrophysical Phenomena Mechanical Engineering Nuclear Theory Gamma ray Plasma 01 natural sciences 010305 fluids & plasmas Nuclear physics Nuclear Energy and Engineering Deuterium Physics::Plasma Physics KSTAR 0103 physical sciences General Materials Science Neutron Nuclear Experiment 010306 general physics Civil and Structural Engineering Neutron activation Burnup |
| Zdroj: | Fusion Engineering and Design. :545-548 |
| ISSN: | 0920-3796 |
| DOI: | 10.1016/j.fusengdes.2016.02.058 |
| Popis: | On the purpose of triton burnup measurements in Korea Superconducting Tokamak Advanced Research (KSTAR) deuterium plasmas, appropriate neutron activation system (NAS) samples for 14.1 MeV d-t neutron measurements have been designed and gamma-ray counting strategy is established. Neutronics calculations are performed with the MCNP5 neutron transport code for the KSTAR neutral beam heated deuterium plasma discharges. Based on those calculations and the assumed d-t neutron yield, the activities induced by d-t neutrons are estimated with the inventory code FISPACT-2007 for candidate sample materials: Si, Cu, Al, Fe, Nb, Co, Ti, and Ni. It is found that Si, Cu, Al, and Fe are suitable for the KSATR NAS in terms of the minimum detectable activity (MDA) calculated based on the standard deviation of blank measurements. Considering background gamma-rays radiated from surrounding structures activated by thermalized fusion neutrons, appropriate gamma-ray counting strategy for each selected sample is established. |
| Databáze: | OpenAIRE |
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