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<p>In 2014, the United States Department of Energy and the Japan Atomic Energy Agency (JAEA) reached an agreement to have all separated plutonium and highly enriched uranium removed from Japan’s Fast Critical Assembly (FCA) reactor at Tokai. Dissolution of the spent nuclear fuel for waste treatment and disposal successfully began in early 2024 at the Savannah River Site (SRS). Monitoring of plutonium concentration throughout the FCA dissolution process was supported by methodology developed at the Savannah River National Laboratory (SRNL) utilizing a radiologically-contained quadrupole-inductively coupled plasma-mass spectrometer (Q-ICP-MS). As an alternative to multicollector mass spectrometry, a plutonium Isotope Dilution Mass Spectrometry (IDMS) protocol was developed on the Q-ICP-MS and implemented to quantify plutonium in process grab-samples for high throughput material analysis support. The final method uncertainty for plutonium concentration was determined to be ± 0.456% (1-sigma).</p>

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Application of quadrupole-inductively coupled plasma-mass spectrometry in the analysis of plutonium content of fast critical assembly fuel disposition

  • 期刊论文

  • 发表日期：

    2026年3月28日

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  • H. J. Bonilla,
  • T. L. White,
  • D. M. Odell,
  • M. E. Morales-Arteaga,
  • N. G. Wyeth,
  • M. A. Jones

摘要

In 2014, the United States Department of Energy and the Japan Atomic Energy Agency (JAEA) reached an agreement to have all separated plutonium and highly enriched uranium removed from Japan’s Fast Critical Assembly (FCA) reactor at Tokai. Dissolution of the spent nuclear fuel for waste treatment and disposal successfully began in early 2024 at the Savannah River Site (SRS). Monitoring of plutonium concentration throughout the FCA dissolution process was supported by methodology developed at the Savannah River National Laboratory (SRNL) utilizing a radiologically-contained quadrupole-inductively coupled plasma-mass spectrometer (Q-ICP-MS). As an alternative to multicollector mass spectrometry, a plutonium Isotope Dilution Mass Spectrometry (IDMS) protocol was developed on the Q-ICP-MS and implemented to quantify plutonium in process grab-samples for high throughput material analysis support. The final method uncertainty for plutonium concentration was determined to be ± 0.456% (1-sigma).