Verification of a quantitative method of uranium 238 in the radioactive waste using photon occurred by Compton effect

Yokoyama, Kaoru; Hata, Haruhi   ; Naganuma, Masaki; Ohara, Yoshiyuki; Ishimori, Yuu  

Authors developed the new analysis technique (hereinafter referred to as the equivalent model) which calculates the amount of uranium by correcting the influence of uneven distribution of the uranium. Two rays different in the shelter effect are used in the equivalent model. The rays (766 keV, 1001 keV) released from Pa are used for uranium quantitative determination. The quantity error is decided by the ray with the small calculation rate. The way to get the high calculation rate is considered to reduce the quantity error. Many rays are scattered by the Compton effect in radioactive waste, and scattered photons occur. We applied the scattered photon with the big count rate to equivalent model. It was effective to apply the count rate of the scattered photon by the Compton effect to equivalent model.