Chemical-technological and mineralogical-geochemical aspects of the radioactive waste management

Stefanovsky, S. V.; Yudintsev, S. V.; Винокуров, С. Е.; Myasoedov, Β. F.

doi:10.1134/s001670291613019x

Cited by 19 publications

(11 citation statements)

References 85 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Vitrification is the only industrial technology for HLW management [2]. The use of the magnesium potassium phosphate (MKP) compound based on the MgKPO 4 × 6H 2 O matrix has particular interest as an alternative to aluminophosphate or borosilicate glass.…”

Section: Introductionmentioning

confidence: 99%

The Influence of Zeolite (Sokyrnytsya Deposit) on the Physical and Chemical Resistance of a Magnesium Potassium Phosphate Compound for the Immobilization of High-Level Waste

Kulikova

Винокуров

2019

Molecules

View full text Add to dashboard Cite

The manuscript presents the results of the development of new material for high-level waste (HLW) management: the magnesium potassium phosphate (MKP) compound. The possibility of using zeolite (Sokyrnytsya deposit) to increase the mechanical, thermal, and hydrolytic resistance of this compound with immobilized HLW was studied. The main component of the used natural zeolite is a mineral of the clinoptilolite–heulandite series, and quartz, microcline, and clay minerals (illite, sepiolite, and smectite) are present as impurities. The compressive strength of the compound, containing at least 4.2 wt % zeolite, is about 25 MPa. Compound containing 28.6 wt % zeolite retains high compressive strength (at least 9.0 MPa), even after heat treatment at 450 °C. The adding of zeolite to the composition of the compound increases its hydrolytic stability, while the leaching rate of the mobile nuclides 137Cs and 90Sr decreases up to one order of values. Differential leaching rate of radionuclides from the compound containing 28.6 wt % zeolite is 2.6 × 10−7 for 137Cs, 2.9 × 10−6 for 90Sr, 1.7 × 10−9 for 239Pu, and 2.9 × 10−9 g/(cm2∙day) for 241Am. Thus, the properties of the resulting compound correspond to the requirements for solidified HLW in Russia.

show abstract

Section: Introductionmentioning

confidence: 99%

The Influence of Zeolite (Sokyrnytsya Deposit) on the Physical and Chemical Resistance of a Magnesium Potassium Phosphate Compound for the Immobilization of High-Level Waste

Kulikova

Винокуров

2019

Molecules

View full text Add to dashboard Cite

show abstract

“…Long-term controlled storage or disposal is one of the key stages of the liquid radioactive waste (LRW) management in terms of radiation safety. The preparation of the LRW for this stage involves the transfer of waste into a stable solidified form using preserving matrices [ 1 , 2 ]. Cementation has found wide use in the nuclear industry for radioactive waste (RW) management of low and intermediate activity levels, in spite of significant disadvantages of the method, especially the relatively low degree of incorporation of waste salts, as well as low hydrolytic stability and frost resistance of cement compound.…”

Section: Introductionmentioning

confidence: 99%

Magnesium Potassium Phosphate Compound for Immobilization of Radioactive Waste Containing Actinide and Rare Earth Elements

2018

View full text Add to dashboard Cite

The problem of effective immobilization of liquid radioactive waste (LRW) is key to the successful development of nuclear energy. The possibility of using the magnesium potassium phosphate (MKP) compound for LRW immobilization on the example of nitric acid solutions containing actinides and rare earth elements (REE), including high level waste (HLW) surrogate solution, is considered in the research work. Under the study of phase composition and structure of the MKP compounds that is obtained by the XRD and SEM methods, it was established that the compounds are composed of crystalline phases—analogues of natural phosphate minerals (struvite, metaankoleite). The hydrolytic stability of the compounds was determined according to the semi-dynamic test GOST R 52126-2003. Low leaching rates of radionuclides from the compound are established, including a differential leaching rate of 239Pu and 241Am—3.5 × 10−7 and 5.3 × 10−7 g/(cm2∙day). As a result of the research work, it was concluded that the MKP compound is promising for LRW immobilization and can become an alternative material combining the advantages of easy implementation of the technology, like cementation and the high physical and chemical stability corresponding to a glass-like compound.

show abstract

“…High-Level Waste (HLW) is generated by reprocessing nuclear fuel after uranium and plutonium extraction ( Stefanovsky et al., 2016 ). Its management is principally concerned with the processing of HLW solutions for the recovery of valuable actinides such as uranium and plutonium; removal of minor actinides and other long-lived fission products ( Sengupta and Gupta, 2017 ).…”

Section: Introductionmentioning

confidence: 99%

Toward a cleaner and more sustainable world: A framework to develop and improve waste management through organizations, governments and academia

Anuardo

Espuny

Costa

et al. 2022

Heliyon

View full text Add to dashboard Cite

Chemical-technological and mineralogical-geochemical aspects of the radioactive waste management

Cited by 19 publications

References 85 publications

The Influence of Zeolite (Sokyrnytsya Deposit) on the Physical and Chemical Resistance of a Magnesium Potassium Phosphate Compound for the Immobilization of High-Level Waste

The Influence of Zeolite (Sokyrnytsya Deposit) on the Physical and Chemical Resistance of a Magnesium Potassium Phosphate Compound for the Immobilization of High-Level Waste

Magnesium Potassium Phosphate Compound for Immobilization of Radioactive Waste Containing Actinide and Rare Earth Elements

Toward a cleaner and more sustainable world: A framework to develop and improve waste management through organizations, governments and academia

Contact Info

Product

Resources

About