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Increasing the sensitivity of241Pu determination for emission and immission control of nuclear installations by aid of liquid scintillation counting

  • Measurement of Radionuclides in Environmental Studies
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Abstract

A radiochemical procedure was developed and optimized which allows sensitive241Pu measurement in various sample materials. As a first step, Pu isotopes are separated from matrix elements, purified radiochemically, electroplated, and measured by α-spectrometry. The electrodeposited Pu is then redissolved in nitric acid and extracted with trioctylphosphinic oxide/cyclohexane. The organic phase is mixed with scintillator cocktail (PPO/Xylene) and Pu is measured with a liquid scintillation counter. The detection limit of the optimized procedure for a counting time of 100 minutes is 50 mBq241Pu per sample at a 95% confidence level.

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  1. Central Safety Department, Karlsruhe Nuclear Research Center, Box 3640, D-7500, Karlsruhe, (Germany)

    M. Pimpl

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  1. M. Pimpl
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Pimpl, M. Increasing the sensitivity of241Pu determination for emission and immission control of nuclear installations by aid of liquid scintillation counting. Journal of Radioanalytical and Nuclear Chemistry, Articles 161, 429–436 (1992). https://doi.org/10.1007/BF02040489

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  • DOI: https://doi.org/10.1007/BF02040489

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