Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Yasuda, Kenichiro; Suzuki, Daisuke; Kanazawa, Kazuhito; Miyamoto, Yutaka; Esaka, Fumitaka; Magara, Masaaki
no journal, ,
In order to detect of undeclared activities in nuclear facilities, we develop to technique of safeguards environmental sample analysis in JAEA. As part of this effort, isotope ratio analysis of individual MOX particle was performed using by TIMS without chemical treatment. It is possible to estimate an age determination of plutonium purification by a combination of the plutonium isotope ratios and (Pu-238+Am-241)/(Pu-239+Pu-240) alpha activity ratios were obtained by the alpha spectrometry. Since the plutonium particle size is more than 1
m due to the influence of self-absorption, exactly measurement of the activity ratios has been difficult. Therefore, we were examining how to acid dissolution in the plutonium particles on the TIMS filament before alpha spectrometry.
Yasuda, Kenichiro; Suzuki, Daisuke; Kanazawa, Kazuhito; Miyamoto, Yutaka; Esaka, Fumitaka; Magara, Masaaki
no journal, ,
We are applying a screening technique with alpha spectrometry to the analysis of particles containing nuclear materials in swipe samples. In this presentation, individual plutonium particles with known purification dates prepared from a standard reference material (NBS SRM947) were measured with alpha spectrometry. The obtained 
activity ratios for the particles with the diameters of more than 1 micrometer were consistent with the reference values within the uncertainties. These results indicate that alpha spectrometry can be applied to the quantitative analysis of 
Am in individual plutonium particles.
Yasuda, Kenichiro; Suzuki, Daisuke; Kanazawa, Kazuhito; Miyamoto, Yutaka; Esaka, Fumitaka; Magara, Masaaki
no journal, ,
We are applying a screening technique with alpha-ray measurement to the analysis of particles containing nuclear materials in swipe samples. In the present study, individual plutonium particles with known purification dates prepared from a standard reference material (NBS SRM947) were measured with alpha-ray spectrometry. The obtained (Am+
Pu)/
Pu activity ratios for the particles with the diameters of less than 2 micrometers were consistent with the reference values within the uncertainties. These results indicate that alpha spectrometry can be applied to the quantitative analysis of Am in individual plutonium particles.