Radioactivity analysis for EPS waste using organic solvents

Jun Woo Bae; Hee Reyoung Kim

doi:10.1016/j.net.2021.06.008

Radioactivity analysis for EPS waste using organic solvents

Jun Woo Bae, Hee Reyoung Kim

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

In this study, the recovery rates of the dissolution method for radioactivity analysis of expandable polystyrene (EPS) with a liquid scintillation counter (LSC) using tetrahydrofuran (THF), toluene, and acetone as solvents were estimated. The detection efficiency calibration curve for each solvent was derived. Two methods—the volumetric ratio method and the quenching agent method—were used to prepare quench source sets, and calibration curves were derived by linking the data from the two quench source sets. The R² value of the calibration curve for THF was found to be 0.984. The relationship between the mass of dissolved EPS and the quench level was estimated: the quench level increased as the mass of dissolved EPS increased. Premix and postmix dissolution methods were tested. The recovery rates using THF with the premix method were 84.9 ± 0.9% and 96.5 ± 1.5% for ³H and ¹⁴C, respectively. Furthermore, the stability of the recovery rate over time when using THF was evaluated. The dissolution method with the premixed solution exhibited a more stable recovery rate over time. The dissolution methods were found to be applicable for analysis using LSC, and THF was found to be the most suitable solvent for the proposed method.

Original language	English
Pages (from-to)	3717-3722
Number of pages	6
Journal	Nuclear Engineering and Technology
Volume	53
Issue number	11
DOIs	https://doi.org/10.1016/j.net.2021.06.008
State	Published - Nov 2021
Externally published	Yes

Funding

This work was supported by the Korea Institute of Energy Technology Evaluation and Planning and the Ministry of Trade, Industry and Energy, Republic of Korea (grant no. 20191510301110), and by the National Research Foundation of Korea (NRF) grant funded by the Korean government (Ministry of Science, ICT and Future Planning; grant nos.: NRF-2016M2B2B1945082 and NRF-22A20153413555). This work was supported by the Korea Institute of Energy Technology Evaluation and Planning and the Ministry of Trade, Industry and Energy , Republic of Korea (grant no. 20191510301110 ), and by the National Research Foundation of Korea (NRF) grant funded by the Korean government ( Ministry of Science, ICT and Future Planning ; grant nos.: NRF-2016M2B2B1945082 and NRF-22A20153413555 ).

Funders	Funder number
Ministry of Trade, Industry and Energy , Republic of Korea
Ministry of Trade, Industry and Energy	20191510301110
Ministry of Science, ICT and Future Planning	NRF-22A20153413555, NRF-2016M2B2B1945082
National Research Foundation of Korea
Korea Institute of Energy Technology Evaluation and Planning

Keywords

C
H
Acetone
Expandable polystyrene
Tetrahydrofuran
Toluene

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10.1016/j.net.2021.06.008

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title = "Radioactivity analysis for EPS waste using organic solvents",

abstract = "In this study, the recovery rates of the dissolution method for radioactivity analysis of expandable polystyrene (EPS) with a liquid scintillation counter (LSC) using tetrahydrofuran (THF), toluene, and acetone as solvents were estimated. The detection efficiency calibration curve for each solvent was derived. Two methods—the volumetric ratio method and the quenching agent method—were used to prepare quench source sets, and calibration curves were derived by linking the data from the two quench source sets. The R2 value of the calibration curve for THF was found to be 0.984. The relationship between the mass of dissolved EPS and the quench level was estimated: the quench level increased as the mass of dissolved EPS increased. Premix and postmix dissolution methods were tested. The recovery rates using THF with the premix method were 84.9 ± 0.9% and 96.5 ± 1.5% for 3H and 14C, respectively. Furthermore, the stability of the recovery rate over time when using THF was evaluated. The dissolution method with the premixed solution exhibited a more stable recovery rate over time. The dissolution methods were found to be applicable for analysis using LSC, and THF was found to be the most suitable solvent for the proposed method.",

keywords = "C, H, Acetone, Expandable polystyrene, Tetrahydrofuran, Toluene",

author = "Bae, {Jun Woo} and Kim, {Hee Reyoung}",

note = "Publisher Copyright: {\textcopyright} 2021 Korean Nuclear Society",

year = "2021",

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doi = "10.1016/j.net.2021.06.008",

language = "English",

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AB - In this study, the recovery rates of the dissolution method for radioactivity analysis of expandable polystyrene (EPS) with a liquid scintillation counter (LSC) using tetrahydrofuran (THF), toluene, and acetone as solvents were estimated. The detection efficiency calibration curve for each solvent was derived. Two methods—the volumetric ratio method and the quenching agent method—were used to prepare quench source sets, and calibration curves were derived by linking the data from the two quench source sets. The R2 value of the calibration curve for THF was found to be 0.984. The relationship between the mass of dissolved EPS and the quench level was estimated: the quench level increased as the mass of dissolved EPS increased. Premix and postmix dissolution methods were tested. The recovery rates using THF with the premix method were 84.9 ± 0.9% and 96.5 ± 1.5% for 3H and 14C, respectively. Furthermore, the stability of the recovery rate over time when using THF was evaluated. The dissolution method with the premixed solution exhibited a more stable recovery rate over time. The dissolution methods were found to be applicable for analysis using LSC, and THF was found to be the most suitable solvent for the proposed method.

KW - C

KW - H

KW - Acetone

KW - Expandable polystyrene

KW - Tetrahydrofuran

KW - Toluene

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IS - 11

ER -

Radioactivity analysis for EPS waste using organic solvents

Abstract

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