Výsledky vyhledávání - "Sergei A. Stepanov"

Akademický článek

Separation and purification of elements from alkaline and carbonate nuclear waste solutions

Autor: Alexander V. Boyarintsev, Sergei I. Stepanov, Galina V. Kostikova, Valeriy I. Zhilov, Alfiya M. Safiulina, Aslan Yu Tsivadze

Publikováno v: Nuclear Engineering and Technology, Vol 55, Iss 2, Pp 391-407 (2023)

This article provides a survey of wet (aqueous) methods for recovery, separation, and purification of uranium from fission products in carbonate solutions during the reprocessing of spent nuclear fuel and methods for removal of radionuclides from alk

Externí odkaz: https://doaj.org/article/a142f775051347b7b3c7e368421fd080

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Akademický článek

Reprocessing of spent nuclear fuel in carbonate media: Problems, achievements, and prospects

Autor: Sergei I. Stepanov, Alexander V. Boyarintsev

Publikováno v: Nuclear Engineering and Technology, Vol 54, Iss 7, Pp 2339-2358 (2022)

The review discusses various alternative approaches for spent nuclear fuel (SNF) reprocessing in aqueous carbonate media. The main stages, schemes, and methods of the most well-known and well-described processes for reprocessing SNF and some high-lev

Externí odkaz: https://doaj.org/article/26fe5d3b7b4c4920bc018c0d9d4f287e

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Akademický článek

Reprocessing of fluorination ash surrogate in the CARBOFLUOREX process

Autor: Alexander V. Boyarintsev, Sergei I. Stepanov, Alexander M. Chekmarev, Aslan Yu. Tsivadze

Publikováno v: Nuclear Engineering and Technology, Vol 52, Iss 1, Pp 109-114 (2020)

This work presents the results of laboratory scale tests of the CARBOFLUOREX (CARBOnate FLUORide EXtraction) process – a novel technology for the recovery of U and Pu from the solid fluorides residue (fluorination ash) of Fluoride Volatility Method

Externí odkaz: https://doaj.org/article/09ddb6f4f8bb4be0b5493a63e886b4c9

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Akademický článek

Reprocessing of simulated voloxidized uranium–oxide SNF in the CARBEX process

Autor: Alexander V. Boyarintsev, Sergei I. Stepanov, Galina V. Kostikova, Valeriy I. Zhilov, Alexander M. Chekmarev, Aslan Yu. Tsivadze

Publikováno v: Nuclear Engineering and Technology, Vol 51, Iss 7, Pp 1799-1804 (2019)

The concept of a new method, the CARBEX (CARBonate EXtraction) process, was proposed for reprocessing of spent uranium oxide fuel. The proposed process is based on use of water solutions of Na2CO3 or (NH4)2CO3 and solvent extraction (SE) by the quate

Externí odkaz: https://doaj.org/article/71dd224a51964bfdbbc348fe390daf16

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Akademický článek

Separation of Rare-Earth Elements from Nitrate Solutions by Solvent Extraction Using Mixtures of Methyltri-n-octylammonium Nitrate and Tri-n-butyl Phosphate

Autor: Sergei I. Stepanov, Nguyen Thi Yen Hoa, Ekaterina V. Boyarintseva, Alexander V. Boyarintsev, Galina V. Kostikova, Aslan Yu. Tsivadze

Publikováno v: Molecules, Vol 27, Iss 2, p 557 (2022)

The article presents data on the solvent extraction separation of rare-earth elements (REEs), such as La(III), Ce(III), Pr(III), and Nd(III), using synergic mixtures of methyltrioctylammonium nitrate (TOMANO3) with tri-n-butyl phosphate (TBP) from we

Externí odkaz: https://doaj.org/article/7d549a4ff351464baebaeae1423ef335

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Многомасштабное понижение порядка модели термоупругости с фазовым переходом с использованием обобщенного многомасштабного метода конечных элементов

Autor: Dmitrii Andreevich Ammosov, Vasilii Ivanovich Vasiliev, Mariya Vasil'evna Vasil'eva, Sergei Pavlovich Stepanov

Publikováno v: Teoreticheskaya i Matematicheskaya Fizika. 211:181-199

Для освоения криолитозоны необходимо строить и численно реализовывать математические модели мультифизичных процессов термоупругости

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::26df0ddbd25a0c220e3f6d589aa68063
https://doi.org/10.4213/tmf10244

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Совершенствование модели материального баланса для учета изменения коэффициента продуктивности скважин

Autor: Nikita Olegovich Shevtsov, Sergei Viktorovich Stepanov

Publikováno v: Математическое моделирование. 34:3-16

Модель материального баланса в виде аналитической емкостно-резистивной модели (CRM) находит все большее применение для математического �

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d60addf053a270b0c415b39435020537
https://doi.org/10.20948/mm-2022-02-01

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