STUDY ON PLASMA TEMPERATURE CHANGES IN LASER-INDUCED BREAKDOWN SPECTROSCOPY (LIBS) FOR DECOMMISSIONING OF FUKUSHIMA DAIICHI NUCLEAR POWER STATION

抄録

We propose using Laser-Induced Breakdown Spectroscopy (LIBS) for preliminary, simple analysis to efficiently analyze the fuel debris generated by the accident at TEPCO’s Fukushima Daiichi Nuclear Power Plant (FDNPP). LIBS is an elemental analysis method that uses laser-generated plasma. The plasma emission is measured by a spectrometer to identify is used to create the calibration curve, but this ratio may be affected by the plasma temperature. Therefore, it is preferable for the plasma temperature to remain constant in LIBS. However, the plasma temperature can change depending on the measurement conditions, which may also affect the spectrum. This study conducted experiments under various conditions to verify whether the plasma temperature changes.