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Study on the direct measurement method for trace plutonium in samples from spent fuel reprocessing

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Title: Study on the direct measurement method for trace plutonium in samples from spent fuel reprocessing
Authors: Li Li, Han Yang, Yingtong Fang, Xianlong Chang, Yuning Niu, Guodu Jiang, Songtao Yang, Zhiheng Wang, Zhaoqing Zhang, Yurong Li, Quanwei Liu
Source: International Journal of Advanced Nuclear Reactor Design and Technology, Vol 7, Iss 3, Pp 195-202 (2025)
Publisher Information: Elsevier BV, 2025.
Publication Year: 2025
Subject Terms: Plexiglass, α scintillation counter, TK9001-9401, Nuclear engineering. Atomic power, Plutonium concentration, ZnS(Ag)
Description: To directly, rapidly, and accurately measure trace plutonium in reprocessing samples, two α scintillation counters were developed for the direct measurement of liquids and solids after source preparation. An analytical method for directly determining trace plutonium in process samples was established. Both counters used ZnS(Ag) crystals sprayed onto light-guiding plexiglass as detectors for measuring α nuclide activity concentrations in complex samples containing simultaneous α, β, and γ nuclides. Test results indicated a 75.2 % detection efficiency for the first α scintillation counter for 239Pu surface sources with good linearity over the concentration range 5 × 10−6 g/L to 1 × 10−3 g/L in aqueous plutonium solutions. It could also directly measure the α activity concentration in aqueous Pu solutions without source preparation. The second α scintillation counter, used a baking-dish measurement method. It exhibited excellent linearity for aqueous plutonium concentrations over 1.0 × 10−5 to 1 × 10−3 g/L with ≤1 % precision in the 5 × 10−5 to 1 × 10−2 g/L range. Both systems featured rapid and simple operation.
Document Type: Article
Language: English
ISSN: 2468-6050
DOI: 10.1016/j.jandt.2025.06.001
Access URL: https://doaj.org/article/7eb71c1c7ecc46aeb883738648d7caf9
Rights: CC BY NC ND
Accession Number: edsair.doi.dedup.....b8922cf07d9a7e46cd563c78240ef6c2
Database: OpenAIRE
Description
Abstract:To directly, rapidly, and accurately measure trace plutonium in reprocessing samples, two α scintillation counters were developed for the direct measurement of liquids and solids after source preparation. An analytical method for directly determining trace plutonium in process samples was established. Both counters used ZnS(Ag) crystals sprayed onto light-guiding plexiglass as detectors for measuring α nuclide activity concentrations in complex samples containing simultaneous α, β, and γ nuclides. Test results indicated a 75.2 % detection efficiency for the first α scintillation counter for 239Pu surface sources with good linearity over the concentration range 5 × 10−6 g/L to 1 × 10−3 g/L in aqueous plutonium solutions. It could also directly measure the α activity concentration in aqueous Pu solutions without source preparation. The second α scintillation counter, used a baking-dish measurement method. It exhibited excellent linearity for aqueous plutonium concentrations over 1.0 × 10−5 to 1 × 10−3 g/L with ≤1 % precision in the 5 × 10−5 to 1 × 10−2 g/L range. Both systems featured rapid and simple operation.
ISSN:24686050
DOI:10.1016/j.jandt.2025.06.001