Separation and determination of 90Sr in low- and intermediate-level radioactive wastes using extraction chromatography and LSC

Temba, Eliane S. C.; Júnior, Aluísio Souza Reis; Amaral, Ângela Maria; Monteiro, Roberto Pellacani Guedes

doi:10.1007/s10967-011-1327-0

Cited by 15 publications

(4 citation statements)

References 14 publications

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“…The sensitivity of this procedure was higher than those of various previously established approaches for the determination of Sr-90 in solid matrices (Heilgeist 2000;Kabai et al 2011;Shuzhong et al 2015;Temba et al 2011) and comparable to several others (Gerstmann and Tschöpp 2006;Lopes et al 2010;Suomela et al 1993).…”

Section: Accuracysupporting

confidence: 58%

Fast and Sensitive Radiochemical Method for Sr-90 Determination in Food and Feed by Chromatographic Extraction and Liquid Scintillation Counting

et al. 2022

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Strontium-90 (Sr-90) contamination in food is a major public health issue. Several radiochemical methods are available for the determination of Sr-90. However, the application of these procedures is not focused on solid foods, but only on liquid (milk, water, etc.) and environmental matrices, and they were not fully validated. The aims of this work were to establish and validate a fast, sensitive method for the determination of Sr-90 in solid food matrices such as meat and dairy products, seafood, vegetables, and animal feed, using a specific resin for extraction and ultra-low-level liquid scintillation counting for detection. The method was optimised and validated according to relevant legislation. Good analytical performance was obtained, including high specificity and linearity together with low measurement uncertainty (13.1%). The minimal detectable activity was 11 mBq kg−1, and the mean repeatability (CV%) and recovery values were 10.7% and 100.1%, respectively. These parameters assured method applicability for official food safety controls. The method was applied to reference materials and submitted to proficiency test round to confirm its reliability for Sr-90 quantification in solid foodstuffs and feed. The newly established method may be broadly applicable to complex matrices.

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Section: Accuracysupporting

confidence: 58%

Fast and Sensitive Radiochemical Method for Sr-90 Determination in Food and Feed by Chromatographic Extraction and Liquid Scintillation Counting

et al. 2022

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“…is a pure beta emitter with a half-life of about 29 years (the reported half-life varies from 27.7 to 29.1 years), that decays to (T ½ ≈ 64 hours) with the emission of a 546 keV maximum energy beta particle [16]. Based on a research survey [9][10][11] the separation of was carried out by using one or two chromatographic extraction processes (Eichrom ® Sr Resin in 2 mL columns), depending on the activity of the interferences in the elution samples after the first separation process. The purpose was to obtain high decontamination efficiency values.…”

Section: Radiochemical Protocol For Separationmentioning

confidence: 99%

“…Several radiochemical separation methods for , and applied for radioactive waste samples are reported in the literature [7][8][9][10][11][12][13][14], including precipitation/co-precipitation, liquid-liquid extraction, ion exchange chromatography, and extraction chromatography. One of the most frequently used methods for , and separation and purification is extraction chromatography using columns with a selective resin.…”

Section: Introductionmentioning

confidence: 99%

Studies to Establish the Scaling Factor Methodology for Liquid Radioactive Waste Generated by Triga Reactor

DIACONESCU,

DIANU,

BUCUR

et al. 2024

J. Sci. Arts

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During TRIGA reactor operation significant amounts of liquid radioactive waste are generated requiring appropriate management to ensure their safe disposal. Radiological characterization is an important activity needed to accomplish the waste acceptance criteria for different management steps including disposal. The purpose of this paper is to assess the activity concentrations of the (_1^3)H , (_38^90)Sr, (_28^63)Ni (difficult-to-measure), and gamma emitters (easy-to-measure) radionuclides in liquid radioactive waste generated by the TRIGA reactor operation and to establish a correlation among them to determine the scaling factors for this waste category. The radiological protocols applied for (_28^63)Ni and (_38^90)Sr, separation and purification involve extraction chromatography using selective resins, while for (_1^3)H separation the distillation technique was applied. The assessment of gamma emitters was carried out using gamma-ray spectrometry and the detection of (_1^3)H , (_38^90)Sr, and (_28^63)Ni was performed by liquid scintillation counting. The chemical yield of each experiment was determined by measuring the carrier added in each test by inductively coupled plasma optical emission spectrometry. The activity concentrations of (_38^90)Sr, and (_28^63)Ni obtained were correlated with the activity concentration of (_27^60)Co for establishing the scaling factor for the liquid radioactive waste stream. There were obtained good correlations but more experimental data are needed to determine the relevant scaling factors for these difficult-to-measure radionuclides. The scaling factors, once established, will improve and optimize the radiological characterization methodology applied for liquid radioactive waste as an easy and rapid method for assessment of concentration activities of difficult-to-measure radionuclides. Until now, no scaling factors data were reported for this liquid radioactive waste generated by TRIGA reactor operated by Institute for Nuclear Research Pitesti. The results obtained in this work represent preliminary data for establishing correlations between difficult-to-measure and easy-to-measure radionuclides and will be used for developing a scaling factor methodology. This will further be used to determine the inventory of difficult-to-measure radionuclides in different waste streams generated by TRIGA operation and decommissioning (foreseen after 2035).

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“…Among the HTM, 90 Sr is of great interest due to its toxicity and high energy emission. Its determination is time consuming and requires the separation from interferences and quantification using LSC or spectroscopic methods 3 4 5 6 7 8 9 10 11 12 13 .…”

Section: Introductionmentioning

confidence: 99%

Automated <sup>90</sup>Sr Separation and Preconcentration in a Lab-on-Valve System at Ppq Level

Vilas¹,

Millet²,

Sandow³

et al. 2018

JoVE

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A quick, automated and portable system for the separation and determination of radiostrontium in aqueous samples, using Sr-resin and multi sequential flow injection analysis, has been developed. The concentrations of radioactive strontium were determined by flow scintillation counting, allowing for on-line and also on-site determination. The proposed system can determine radioactive strontium at industrial relevant levels without further modification using overall analysis time of less than 10 min per aqueous sample. The limit of the detection is 320 fg·g-1 (1.7 Bq/g).

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Separation and determination of 90Sr in low- and intermediate-level radioactive wastes using extraction chromatography and LSC

Cited by 15 publications

References 14 publications

Fast and Sensitive Radiochemical Method for Sr-90 Determination in Food and Feed by Chromatographic Extraction and Liquid Scintillation Counting

Fast and Sensitive Radiochemical Method for Sr-90 Determination in Food and Feed by Chromatographic Extraction and Liquid Scintillation Counting

Studies to Establish the Scaling Factor Methodology for Liquid Radioactive Waste Generated by Triga Reactor

Automated <sup>90</sup>Sr Separation and Preconcentration in a Lab-on-Valve System at Ppq Level

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