[1A15-20] 1F fuel debris 2

4:50 PM - 5:05 PM JST(7:50 AM - 8:05 AM UTC)

[1A17] Analysis of fuel debris obtained from inside the pedestal of Unit 2 of Fukushima Daiichi Nuclear Power Station(17) Mass spectrometric analysis of the solution obtained by alkali fusion of fuel debris from the second trial retrieval

*Masaki Tambo¹, Hiroyuki Fukaya¹, Fuyumi Kobayashi¹, Arisa Inada¹, Irvin Mardongan Banjarnahor¹, Toru Kitagaki¹, Hirotomo Ikeuchi¹, Masato Mizokami², Shinya Mizokami² (1. JAEA, 2. TEPCO HD)

Keywords:

Fukushima Daiichi Nuclear Power Station accident,Fuel debris,Isotopic composition,Mass spectrometry,Solution analysis

At the Japan Atomic Energy Agency (JAEA), Nuclear Science Research Institute, analytical studies are being conducted to determine the isotopic compositions and elemental ratios of U, Pu, Gd, and Nd in dissolved fuel debris samples. The received fuel debris was converted into a solution by alkaline fusion treatment. The target elements were subsequently separated using anion exchange resin or UTEVA resin, depending on their chemical characteristics. Isotopic measurements were performed using thermal ionization mass spectrometry (TIMS), and the concentrations of each element were determined by isotope dilution mass spectrometry (IDMS).