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Since the abundance of 239Pu in spent nuclear fuels after reprocessing is now much lower than before and there has also been major progress in thermal ionisation mass spectrometry instrumentation and procedures, a new demonstration of the metallic spike IDMS method is presented. The three metallic spikes used were carefully analysed at CBNM to characterise the isotopic and elemental compositions with the best possible accuracy. The three spikes were added to separate aliquands of undiluted spent fuel solution, dissolved in 8M HNO(3)/0.05M HF and diluted by a factor of about 150 with 1.5M HNO(3). These were sent, together with diluted unspiked spent fuel solution, to each of the four participating laboratories. The results are presented and discussed. It is concluded that an accuracy of the order of 0.1-0.2% in the IDMS of uranium and plutonium in solutions of highly irradiated spent fuel can be achieved under normal inspection conditions. The use of an internal standard with multi-collection mass spectrometry could improve this further.

Additional information

Authors: KLEVER H, DWK, Hannover (DE);DE BIEVRE P, JRC Geel (BE);HENDRICKX F, JRC Geel (BE);GALLET M, JRC Geel (BE);DAMEN R, JRC Geel (BE);WENZEL U, IAEA, Wien (AT);SIRISENA K, IAEA, Wien (AT);SWIETLY H, IAEA, Wien (AT);CAPPIS J, IAEA, Wien (AT);FIEDLER R, IAEA, Wien (AT);ZOIGNER A, IAEA, Wien (AT);DERON S, IAEA, Wien (AT);STOJANIK B, WAK, Eggenstein-Leopoldshafen (DE);BERG R, WAK, Eggenstein-Leopoldshafen (DE);ROMKOWSKY M, TUI, Karlsruhe (DE);DE MEESTER R, TUI, Karlsruhe (DE)
Bibliographic Reference: Paper presented: 1989 American Nuclear Society Winter Meeting, San Francisco (US), Nov. 26-30, 1989
Availability: Available from (1) as Paper EN 35113 ORA
Record Number: 199010065 / Last updated on: 1994-12-01
Original language: en
Available languages: en