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[en] The existence of nitrite in the process of U-Pu partition will disturb the partition process. In addition to the reoxidization of Pu3+ to Pu4+, nitrite will also react with reductor. Both reactions are not expected, so that the nitrite ion in the partition process must be eliminated or reduced as much as possible. An experiment on the nitrite elimination in the partition process was done by reacting nitrite with diphenyl thio urea. The experiment result showed that the optimum condition was achieved at a contact time of 6 minutes, at the concentration of 0.004 N (300% stoichiometric), and the elimination result was 90%. This result is competitive enough if compared with hydrazine hydroxide or amido sulphonic acid, where the contact time is 6 minutes, the excess of both reactants are 200% and 300%, and the elimination results are 60% and 50% respectively
Source
Sudjatmoko; Karmanto, Eko Edy; Endang-Supartini (Yogyakarta Nuclear Research Centre, National Atomic Energy Agency, Yogyakarta (Indonesia)); National Atomic Energy Agency, Yogyakarta Nuclear Research Centre, Yogyakarta (Indonesia); 394 p; ISSN 0216-3128; 
; Apr 1996; p. 211-214; Scientific Meeting and Presentation on Basic Research in Nuclear Science and Technology; Pertemuan dan Presentasi Ilmiah Penelitian Dasar Ilmu Pengetahuan Teknologi Nuklir; Yogyakarta (Indonesia); 23-25 Apr 1996; Also available from Centre for Development of Nuclear Informatics, National Nuclear Energy Agency, Puspiptek Area, Fax. 62-21-7560923, PO BOX 4274, Jakarta (ID); 4 refs; 1 tab; 2 figs
; Apr 1996; p. 211-214; Scientific Meeting and Presentation on Basic Research in Nuclear Science and Technology; Pertemuan dan Presentasi Ilmiah Penelitian Dasar Ilmu Pengetahuan Teknologi Nuklir; Yogyakarta (Indonesia); 23-25 Apr 1996; Also available from Centre for Development of Nuclear Informatics, National Nuclear Energy Agency, Puspiptek Area, Fax. 62-21-7560923, PO BOX 4274, Jakarta (ID); 4 refs; 1 tab; 2 figs