[3D08-11] Analytical Technique 2

[3D09] Demonstration study of Analytical Methods and Identification of Issues using TMI-2 Debris for Chemical Analysis of Fuel Debris

*Satoshi Nakamura¹, Yasutoshi Ban¹, Mie Sugimoto¹, Masaki Tambo¹, Hiroyuki Fukaya¹, Kenta Hiruta¹, Takuya Yoshida¹, Hiroyuki Uehara¹, Yasuhiko Kimura¹, Masahide Takano¹ (1. Japan Atomic Energy Agency)

Keywords:Fuel debris, Fukushima Daiichi NPP accident, sodium peroxide, alkaline fusion

In Nuclear Science Research Institute at JAEA, detailed studies with regard to the elemental and nuclide compositions of fuel debris have been proceeding. We have conducted dissolution of the samples by alkaline fusion with sodium peroxide and chemical analysis by ICP-AES, alpha and gamma spectrometer, and TIMS. After studying the dissolution methods with various types of simulated debris, a demonstration test with TMI-2 debris was conducted. The elemental composition in the dissolved solution of TMI-2 debris consistent with the results of SEM/WDX and XRD analyses, and the validity of the present method was confirmed. In this presentation, the details of each analysis and the issues raised through the analysis will be introduced.