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Pretreatment of radioactive concentrate from leadbismuth cooled fast reactors: flocculant screening and process optimization

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creativeworkseries.issn2452-3038
dc.contributor.authorPeng, S.
dc.contributor.authorWang, D.
dc.contributor.authorLi, S.
dc.contributor.authorLi, J.
dc.contributor.authorXie, H.
dc.date.accessioned2026-05-28T14:43:38Z
dc.date.available2026-05-28T14:43:38Z
dc.date.issued2026
dc.description.abstractThe processing of radioactive concentrates generated during the operation of lead bismuth fast reactors is extremely difficult, with complex components including heavy metals such as Pb and Bi, radioactive nuclides such as Cs, Sr, and Co, alpha emitters such as 210-Po, as well as organic matter and suspended particles. This study focuses on the pretreatment challenges of this radioactive liquid waste, systematically screening 13 types of mature commercial flocculants and evaluating their efficiency in the flocculative removal of key heavy metals and simulated radionuclides from the concentrate. The experimental results showed that the flocculant #9 had a removal efficiency of over 99% for Pb, Bi, and Co within 20 minutes, and a removal efficiency of 96% for the 210-Po analog element Te. The effluent pH was close to neutral, which was superior to other reagents. Through optimization via single-factor experiments and Response Surface Methodology, the optimal process parameters for flocculant #9 were determined as follows: pH 7.8, dosage of 1.17 g/L, and flocculation time of 15.9 minutes. This study provides an efficient and low-cost pretreatment process for radioactive concentrate from lead-bismuth reactors, which can significantly reduce the subsequent deep purification load of 21°Po and offers technical support for the optimization of nuclear waste liquid treatment processes.
dc.description.urihttps://nucet.pensoft.net/article/173459/
dc.identifier.citationPeng S, Wang D, Li S, Li J, Xie H (2026) Pretreatment of radioactive concentrate from lead-bismuth cooled fast reactors: flocculant screening and process optimization. Nuclear Energy and Technology 12(1): 29-39.https://doi.org/10.3897/nucet.12.173459
dc.identifier.doi10.3897/nucet.12.173459
dc.identifier.urihttps://openrepository.mephi.ru/handle/123456789/42574
dc.publisherНИЯУ МИФИ
dc.subjectLead-bismuth reactor
dc.subjectResponse surface methodology (RSM)
dc.subjectProcess optimization
dc.subjectHeavy metals
dc.subjectFlocculation sedimentation
dc.subjectFission products
dc.titlePretreatment of radioactive concentrate from leadbismuth cooled fast reactors: flocculant screening and process optimization
dc.typeArticleru
dspace.entity.typePublication
journal.titleNuclear Energy and Technology (NUCET)
journalvolume.identifier.nameNuclear Energy and Technology (NUCET)
relation.isJournalIssueOfPublicationc591352d-eef6-4b8e-bf6d-08c7f7c3677e
relation.isJournalIssueOfPublication.latestForDiscoveryc591352d-eef6-4b8e-bf6d-08c7f7c3677e
relation.isJournalOfPublicatione11ecc6c-1851-485a-af73-18119b4fce7f
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