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Recovery of protactinium from irradiated thorium nitrate by solvent extraction
- Authors: Khokhlov M.L.1, Yakushin A.P.1, Fedorov Y.S.2, Samonin V.V.2, Davidenko V.D.3, Kovalishin A.A.3, Pavlov K.V.3, Titarenko Y.E.3, Kirsanov A.S.3,4, Arkhipov A.A.4, Kotel'nyi M.V.4
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Affiliations:
- Khlopin Radium Institute
- St. Petersburg State Institute of Technology (Technical University)
- National Research Center Kurchatov Institute
- Moscow Polytechnic University
- Issue: Vol 67, No 2 (2025)
- Pages: 112-118
- Section: Articles
- URL: https://ogarev-online.ru/0033-8311/article/view/308135
- DOI: https://doi.org/10.31857/S0033831125020022
- ID: 308135
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Abstract
Recovery of protactinium from irradiated thorium nitrate by solvent extraction is studied in relation to the blanket conditions of a fusion neutron source (FNS) using n-octanol and diisobutylcarbinol (DIBC) as extractants. The degree of extraction of 233Pa from a solution of irradiated thorium nitrate (600 g/dm3) in 3 M nitric acid in one contact exceeded 80%, and the separation coefficients from uranium and thorium were obtained to be more than 600 and 130 000, respectively. To minimize the content of 232U in 233U (to less than 5 ppm), a procedure is proposed that includes short-term irradiation of thorium nitrate and continuous extraction of protactinium.
About the authors
M. L. Khokhlov
Khlopin Radium Institute
Email: fys54@mail.ru
2-i Murinskii pr. 28, St. Petersburg, 194021 Russia
A. P. Yakushin
Khlopin Radium Institute
Email: fys54@mail.ru
2-i Murinskii pr. 28, St. Petersburg, 194021 Russia
Yu. S. Fedorov
St. Petersburg State Institute of Technology (Technical University)
Email: fys54@mail.ru
Moskovskii pr. 24-26/49 lit. A, St. Petersburg, 190013 Russia
V. V. Samonin
St. Petersburg State Institute of Technology (Technical University)
Email: fys54@mail.ru
Moskovskii pr. 24-26/49 lit. A, St. Petersburg, 190013 Russia
V. D. Davidenko
National Research Center Kurchatov Institute
Email: fys54@mail.ru
pl. Akademika Kurchatova 1, Moscow, 123182 Russia
A. A. Kovalishin
National Research Center Kurchatov Institute
Email: fys54@mail.ru
pl. Akademika Kurchatova 1, Moscow, 123182 Russia
K. V. Pavlov
National Research Center Kurchatov Institute
Email: fys54@mail.ru
pl. Akademika Kurchatova 1, Moscow, 123182 Russia
Yu. E. Titarenko
National Research Center Kurchatov Institute
Email: fys54@mail.ru
pl. Akademika Kurchatova 1, Moscow, 123182 Russia
A. S. Kirsanov
National Research Center Kurchatov Institute; Moscow Polytechnic University
Email: fys54@mail.ru
pl. Akademika Kurchatova 1, Moscow, 123182 Russia; ul. Bol’shaya Semenovskaya 38, Moscow, 107023 Russia
A. A. Arkhipov
Moscow Polytechnic University
Email: fys54@mail.ru
ul. Bol’shaya Semenovskaya 38, Moscow, 107023 Russia
M. V. Kotel'nyi
Moscow Polytechnic University
Author for correspondence.
Email: fys54@mail.ru
ul. Bol’shaya Semenovskaya 38, Moscow, 107023 Russia
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