Pu(IV) Nitrate crystallization behavior confirmation experiment

*; *; *; *

JNC TJ8400 2000-061, 92 Pages, 2000/03

JNC-TJ8400-2000-061.pdf:8.79MB

Crystallization procedure is considered to have an advantage in recovering rather pure uranium from contaminated uranium solution and to be applicable for a new reprocessing process. It was confirmed until last year that the reprocessing process with crystallization procedure has a sufficient advantage. But the data for Pu crystallization is very rare. although it is necessary for design of the process with crystallization procedure. In this study, a beaker scale plutonium test was performed in AEA Technology Harwell Laboratory to confirm a behavior of Pu (IV) nitrate under crystallization condition. The results were examined by Mitsubishi Materials Corporation. Test item was a measurement of temperature in case of Pu (IV) nitrate crystallization or freezing of the solution in the following six parameters. (Pu(g/L):200, 100, 50, HNO(m):6, Pu valence:4). (Pu(g/L):200, 100, 50, HNO(m):4, Pu valence:4). Test results were as follows. (1)Pu(IV) nitrate crystallization was not observed even in the case 200g Pu/L and HNO 6M and 4M which were considered to the best condition but crystal of HO and HNO 3HO were observed. (2)Similar results were obtained for the other parameter with lower Pu concentration. (3)We can estimate that Pu(IV) nitrate crystallization will not occurred in the reprocessing process with crystallization procedure. (4)The solubility data of Pu(NO) - HNO-HO system was obtained.

Influence of NO and HNO on iodine quantity in spent-fuel solutions

Sakurai, Tsutomu; ; ; Komaki, Yoshihide;

Nuclear Technology, 116(3), p.319 - 326, 1996/12

https://doi.org/10.13182/NT96-A35287

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