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Abstract

From the experiments on the simulated waste solutions the following conclusions were drawn: item - The adjustment of pH with NaOH or ammonia works satisfactorily, so that a need for a denitration step preceding the oxalate precipitation is not evident. However, it might be of interest to denitrate the solution for other reasons (e.g. salt load). item - A decontamination factor of at least 2000 could be obtained; for Am even higher values are feasible with Ba as carrier. item - The carriers Ba and Ca both give high DF-values for americium; for plutonium the carrier Ce is a better choice. This fact could lead to the use of mixed carriers, as discussed in the paper. item - The pH has an important influence on the DF-value in the range 0.6--2.0 pH units; the optimum pH is different for the different carriers. item - There seems to be no advantage in a delayed precipitation; this tendency is more pronounced for Am than for Pu. item - Zirconium and nickel co-precipitate with the actinides to a rather high degree, thereby providing an additional decontamination of the solution.par

Additional information

Authors: BOKELUND H JRC-KARLSRUHE, JRC-KARLSRUHE
Bibliographic Reference: INTERNATIONAL SYMPOSIUM ON THE MANAGEMENT OF LOW AND INTERMEDIATE LEVEL RADIOACTIVE WASTES, STOCKHOLM, MAY 16-20, 1988, AVAILABILITY: CEC-LUXEMBOURG, DG XIII/A2, BP 1907, MENTIONING PAPER ORA 33792 E
Availability: Can be ordered online
Record Number: 1989126083100 / Last updated on: 1989-05-01
Category: PUBLICATION
Available languages: en
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