Analysis of cement solidified product and ash samples and preparation of a reference material

Ishimori, Kenichiro ; Haraga, Tomoko   ; Shimada, Asako ; Kameo, Yutaka ; Takahashi, Kuniaki 

Simple and rapid analytical methods for radionuclides in low-level radioactive waste have been developed by the present authors. The methods were applied to simulated solidified products and actual metal wastes to confirm their usefulness. The results were summarized as analytical guide lines. In the present work, cement solidified products and ash wastes were analyzed followed by the analytical guide lines and subjects were picked up and improved for the application of the analytical guide lines to these wastes. Pulverization and homogenization methods for ash wastes were improved to prevent a contamination since the radioactivity concentrations of the ash wastes were relatively high. Pre-treatment method was altered for the ash wastes and cement solidified products taking account for their high composition of Ca. Newly, an analytical method was also developed to measure I with a dynamic reaction cell inductively coupled plasma mass spectrometer. In the analytical test based on the guide lines, -ray emitting nuclides, CoCo and CoCs, were measured to estimate the radioactivity of the other alpha and -ray emitting nuclides. The radionuclides assumed detectable, H,C,Cl,Ni,Sr, and -ray emitting nuclides, were analyzed with the analytical guide lines and their applicability for ash wastes and cement solidified products were confirmed.