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Microwave acid digestion was applied to the dissolution of nuclear fuel samples and optimum conditions were determined. Samples ranging from 0.2 - 5 g, as obtained for verification measurements in nuclear material safeguards, were dissolved by varying the amount and composition of acid, power and time of the microwave heating. Similarly, aliquots of the same samples were also dissolved by heating on a hot plate at about 100 C, applying the sealed reflux method. Uranium and plutonium concentrations were measured and compared to the microwave values. It was concluded that the microwave acid dissolution method requires a shorter heating time (50 %) than conventional heating systems.

Additional information

Authors: SENA F, JRC Karlsruhe (DE);CROMBOOM O, JRC Karlsruhe (DE);KOCH L, JRC Karlsruhe (DE)
Bibliographic Reference: Paper presented: 15th Annual Symposium of the European Safeguards Research and Development Association (ESARDA), Roma (IT), May 11-13, 1993
Availability: Available from (1) as Paper EN 37284 ORA
Record Number: 199310952 / Last updated on: 1994-11-29
Original language: en
Available languages: en