1. Shutdown Dose Rate Analysis for the long-pulse D-D Operation Phase in KSTAR
- Author
-
Yong-Seok Hwang, Jung Hoon Han, Dong Ha Kim, K.S. Joo, and Jin Hun Park
- Subjects
Physics ,Tokamak ,010308 nuclear & particles physics ,Shutdown ,QC1-999 ,Nuclear Theory ,Nuclear data ,01 natural sciences ,law.invention ,Nuclear physics ,Upgrade ,Neutron flux ,law ,KSTAR ,0103 physical sciences ,Neutron ,010306 general physics ,Nuclear Experiment ,Neutron activation - Abstract
KSTAR is a medium size fully superconducting tokamak. The deuterium-deuterium (D-D) reaction in the KSTAR tokamak generates neutrons with a peak yield of 3.5x1016 per second through a pulse operation of 100 seconds. The effect of neutron generation from full D-D high power KSTAR operation mode to the machine, such as activation, shutdown dose rate, and nuclear heating, are estimated for an assurance of safety during operation, maintenance, and machine upgrade. The nuclear heating of the in-vessel components, and neutron activation of the surrounding materials have been investigated. The dose rates during operation and after shutdown of KSTAR have been calculated by a 3D CAD model of KSTAR with the Monte Carlo code MCNP5 (neutron flux and decay photon), the inventory code FISPACT (activation and decay photon) and the FENDL 2.1 nuclear data library.
- Published
- 2017