Procedure for Simultaneous Determination of Uranium and Transuranium Elements in Groundwater and Liquid Radioactive Wastes from the Shelter

Odintsov, A. A.; Pazukhin, É. M.; Khan, V. E.

doi:10.1007/s11137-005-0130-6

Cited by 4 publications

(5 citation statements)

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“…Increasing salinity (e.g., [Na + ] and [Ca 2+ ]), iron ([Fe 3+ ]), and colloid concentrations in the solution resulted generally in decreasing the chemical recovery of Am. A procedure for the separation of Am from rare-earth elements was developed through step-by-step elution from KU-2 cation-exchange resin in the NH 4 + form with α-hydroxyisobutyric acid (pH 4.75) [ 81 ]. Am 3+ cations have a high distribution factor on cation resin at low acidities, which can be easily eluted from the cation exchangers by concentrated acids.…”

Section: Chemical Separation and Purification Proceduresmentioning

confidence: 99%

Determination of 241Am in Environmental Samples: A Review

et al. 2022

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The determination of 241Am in the environment is of importance in monitoring its release and assessing its environmental impact and radiological risk. This paper aims to give an overview about the recent developments and the state-of-art analytical methods for 241Am determination in environmental samples. Thorough discussions are given in this paper covering a wide range of aspects, including sample pre-treatment and pre-concentration methods, chemical separation techniques, source preparation, radiometric and mass spectrometric measurement techniques, speciation analyses, and tracer applications. The paper focuses on some hyphenated separation methods based on different chromatographic resins, which have been developed to achieve high analytical efficiency and sample throughput for the determination of 241Am. The performances of different radiometric and mass spectrometric measurement techniques for 241Am are evaluated and compared. Tracer applications of 241Am in the environment, including speciation analyses of 241Am, and applications in nuclear forensics are also discussed.

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Section: Chemical Separation and Purification Proceduresmentioning

confidence: 99%

Determination of 241Am in Environmental Samples: A Review

et al. 2022

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“…The error strontium activity measurement was ± 25% at P = 0.95. Uranium, plutonium, and americium were detected by alphaspectrometry after the ion exchange separation [3]. Uranium and plutonium were concentrated and separated on anion exchanger AB-17-8 in Clform obtained from 9 mol/dm 3 of HCl.…”

Section: The Experimentsmentioning

confidence: 99%

“…The objects of the study were the waters containing salts, surface-active agents (surfactants), film-forming and complexing agents, mineral oils, other organic compounds and products of their degradation. The uranium content has been measured for two samples: it is equal to 12 and 34 dm 3 ; their pH ranges within 9.63-9.18.…”

Section: Drain Water Purification From Organic Compounds Transuranic ...mentioning

confidence: 99%

“…The LRW residue taken for the research has the following characteristics: organic matter: 7.4-15 g/dm 3 ; COD: 6000-9500 mg O 2 /dm 3 ; inorganic salts: 50-251 g/dm 3 ; and pH = 13.1-13.5 [14].…”

Section: Purification Of Distillation Residue From Organic Compounds ...mentioning

confidence: 99%

“…Further, as the mixed water accumulates, it is transported to the facilities of Chornobyl NPP for being evaporated to the maximum salt concentration. The concentration of organic compounds in these water is 0.4-0.6 g/dm 3 , while dichromate oxidation factor (COD, chemical oxygen demand index) reaches 2000-3500 mg O 2 /dm 3 . For further treatment of LRW by evaporation the content of organic matter in radioactive water should be reduced to COD ≤ 200 mg O 2 /dm 3 , whereas the volumetric activity of alpha emitters should be at the level of ≤ 370 Bq/dm 3 .…”

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confidence: 92%

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Purification of Drain Water and Distillation Residue from Organic Compounds, Transuranic Elements, and Uranium at the Chornobyl NPP

Rudenko¹

2014

Sci. innov.

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The research deals with the purification of drain water and distillation residue from organic (polymeric) compounds, transuranic elements, and uranium. The pretreatment method with the use of Sizol type coagulant-flocculant and catalytic oxidation with hydrogen peroxide and ultrafiltration has been proposed. This method prevents the evaporator coking by dust-suppressor and other organic substances vulcanized by heating. The removal of alpha-emitting radionuclides results in the increasing safety of the nuclear power plant operation. K e y w o r d s: drain water, distillation residue, the Chornobyl nuclear power plant, organic compounds, transuranic elements, and uranium.

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Speciation of uranium and radionuclides in the bottom sediments of premises 001/3 of the "Shelter" object

Odintsov¹,

Palamar²,

Chikur³

2021

Nucl. Phys. At. Energy

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The results of experimental determination of the forms of uranium and radionuclides 90Sr, 137Cs, 154Eu, 238Pu, 239+240Pu, 241Am, and 244Cm in the bottom sediments of the premises 001/3 of the "Shelter" object are presented. By the sequential extraction procedure, the following amounts are determined: water-soluble, exchange, carbonate, and acid-soluble forms of uranium, fission products (90Sr, 137Cs, 154Eu), and transuranium elements (238Pu, 239+240Pu, 241Am, 244Cm) in the bottom sediments in the premises 001/3 on a mark of -2.60 m of auxiliary systems of the reactor compartment of the "Shelter" object. The concentration of uranium in the bottom sediments of room 001/3 is 3.1 ± 0.5 g/kg. Specific activity of 90Sr, 137Cs in the bottom sediments is within the range of 6·108 - 1·109 Bq/kg, and 239+240Pu and 241Am within the range of 6·105 - 8·106 Bq/kg. Radionuclides 90Sr, 137Cs, 154Eu, 238Pu, 239+240Pu, 241Am, 244Сm in the bottom sediments are in different chemical forms that will define their different potential mobility. Uranium and 137Cs in the bottom sediments of premises 001/3 mainly are in exchange forms. The amount of water-soluble forms of uranium and cesium is 1.5 - 3 %. The basic amount of 90Sr, more than 60 %, is carbonate soluble in a weak acid at рН 4.8. More than 65 % of 238Pu and 239+240Pu in the bottom sediments are in acid-soluble forms. The mobility of 154Eu, 241Am and 244Cm in the bottom sediments is much higher than that of plutonium; at pH 4.8 more than 40 % of 241Am go to soluble state. The ratio between the activities of 137Cs/90Sr, 90Sr/239+240Pu, 241Am/239+240Pu, and 244Cm/239+240Pu in the bottom sediments considerably differ from the analogical relations of radionuclides in a fuel containing materials of the "Shelter" object.

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Procedure for Simultaneous Determination of Uranium and Transuranium Elements in Groundwater and Liquid Radioactive Wastes from the Shelter

Cited by 4 publications

References 3 publications

Determination of 241Am in Environmental Samples: A Review

Determination of 241Am in Environmental Samples: A Review

Purification of Drain Water and Distillation Residue from Organic Compounds, Transuranic Elements, and Uranium at the Chornobyl NPP

Speciation of uranium and radionuclides in the bottom sediments of premises 001/3 of the "Shelter" object

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