HEAD-END PROBLEMS IN REPROCESSING OF NITRIDE FUELS CONTAINING 14-N OR 15-N
The fast breeder reactor, FBR, will in the near term be fuelled with mixed oxide fuels, MO-2 with M = U-0.8. However, in a wider perspective the oxides might be replaced by a more dense fuel, such as the mixed carbide, MC, or nitride, MN, capable of attaining very high burn-up values. It is expected that the reprocessing of such advanced fuels will be done by the Purex process in operation for many years on LWR - fuels. As pointed out elsewhere, the advanced fuels must be treated by appropriate head-end procedures in order to produce a feed solution meeting the requirements of the Purex process; one promising procedure for this purpose is based on the direct dissolution of the fuel in nitric acid followed, if required, by additional process steps. Laboratory experiments carried out on advanced fuels in the European Institute for Transuranium Elements have shown that the mixed nitrides are easier to prepare for the Purex process in the head-end by the direct dissolution method than the corresponding carbides. This fact might well favour the nitrides as a future fuel. This paper describes the head-end problems pertinent to the reprocessing of nitrides with emphasis on the direct dissolution procedure. Alternative methods, such as the controlled oxidation, will only be mentioned as a complementary step in the reprocessing of nitrides enriched in nitrogen-15.
Bibliographic Reference: ENC'86 - 4TH EUROPEAN NUCLEAR CONFERENCE AND 9TH FORATOM CONGRESS, GENEVE (SWITZERLAND), JUNE 1-6, 1986 WRITE TO CEC LUXEMBOURG, DG XIII/A2, POB 1907 MENTIONING PAPER E 32695 ORA
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Record Number: 1989125075300 / Last updated on: 1987-12-01
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