Partitioning Of The High-Level Radioactive Waste From The Purex Process By 40% TBF In Isoparaffin Using Magnesium Nitrate As A Salting-Out Agent
Creators
- 1. Radievyj institut im. V.G. Khlopina, Saint-Petersburg (Russian Federation)
Description
Centrifugal contactor rig trials of the partitioning flowsheet were carried out using simulated and real high level waste solutions obtained by reprocessing of WWER-100 spent nuclear fuel with burn-up of 47 MW day/t. 40% TBP in Isopar M was used as a solvent with magnesium nitrate as a salting-out agent. Complete removal of Cs, Sr, Zr and Mo to raffinate was achieved. Rare earth elements, Am and Cm were totally concentrated in TPE and REE product. Comparison of the results of this work with previous trials with iron (III) nitrate as a salting-out agent [1] demonstrated that using magnesium nitrate as a salting-out agent resulted in higher decontamination factors of TPE and REE fraction from Cs (~10000) than using iron (III) nitrate (>7500).
Abstract (Russian)
Проведены стендовые испытания на стенде центробежных экстракторов схемы фракционирования на модельном растворе и на растворах высокоактивного рафината, полученного при переработке ОЯТ ВВЭР-1000 с выгоранием 47 МВт-сут/т, с использованием экстракционной системы на основе 40%-ного ТБФ в Изопаре М и нитрата магния в качестве высаливателя. Показано выведение в рафинат Cs, Sr, Zr и Mo. В реэкстракт ТПЭ и РЗЭ полностью выведены РЗЭ, Am и Cm. Сравнение результатов данных экспериментов с результатами испытаний, проведенных ранее с использованием нитрата железа [1], показало, что очистка фракции ТПЭ и РЗЭ от Cs с использованием нитрата магния выше (коэффициент очистки ~10000), чем при использовании нитрата железа (коэффициент очистки >7500).Additional details
Additional titles
- Original title (Russian)
- FRAKTSIONIROVANIE VYSOKOAKTIVNOGO RAFINATA PUREKS-PROTSESSA С ISPOLьZOVANIEM 40%-NOGO TBF В IZOPARAFINE В PRISUTSTVII VYSALIVATELYA NITRATA MAGNIYA
Publishing Information
- Journal Title
- Radiokhimiya
- Journal Issue
- no.1
- Journal Page Range
- p. 37-41
- ISSN
- 0033-8311
INIS
- Country of Publication
- Russian Federation
- Country of Input or Organization
- Russian Federation
- INIS RN
- 55106228
- Subject category
- S38: RADIATION CHEMISTRY, RADIOCHEMISTRY AND NUCLEAR CHEMISTRY;
- Descriptors DEI
- EXTRACTION; HIGH-LEVEL RADIOACTIVE WASTES; MAGNESIUM NITRATES; PUREX PROCESS; TBP
- Descriptors DEC
- ALKALINE EARTH METAL COMPOUNDS; BUTYL PHOSPHATES; ESTERS; MAGNESIUM COMPOUNDS; MATERIALS; NITRATES; NITROGEN COMPOUNDS; ORGANIC COMPOUNDS; ORGANIC PHOSPHORUS COMPOUNDS; OXYGEN COMPOUNDS; PHOSPHORIC ACID ESTERS; RADIOACTIVE MATERIALS; RADIOACTIVE WASTES; REPROCESSING; SEPARATION PROCESSES; WASTES
Optional Information
- Notes
- 9 refs.