| 초록 |
In this study, photodissolution tests of UO2 sintered pellet were carried out in 3M HNO3 and at about 50oC under UV irradiation. The light source is Hg-lamp emitting 254nm wavelength. As a result, UO2 sintered pellet was well dissolved under UV irradiation, whereas it was hardly dissolved under dark reaction. And, when metal ions such as ruthenium or molybdenum ions were contained in nitric acid solution, UO2 sintered pellet was dissolved far faster than in the solution without metal ions under UV irradiation. This was interpreted that these metal ions were excited into the activated states by absorbing the light, and then the activated metal ions oxidized UO2.
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