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Home Environmental Calixarene Extractants For Radiowaste Partition

Calixarene Extractants For Radiowaste Partition

Description

Efficient reprocessing of liquid wastes arising from nuclear power remains one of the most complicated problems of radiochemical industry. Long-lived radionuclides, especially actinides, are the most hazardous components of the high level wastes (HLW) of nuclear power stations. Their separation from the total waste mass and disposal or reprocessing (transmutation) should enable significantly to raise the ecological safety and efficiency of nuclear fuel cycle. A combined approach to HLW reprocessing, i.e. the recovery of several radionuclide groups immediately in one cycle, seems to be promising.

The HLW partitioning problem can be solved by the extraction technology with the use of organophosphorus extractants recovering TRU, technetium and platinides. The widely used extractants like trialkylphosphine oxide, carbamoylphosphine oxides or diphosphine dioxides possess low efficiency and insufficient selectivity, affording no separation of hazardous radionuclides from acidic high-level waste.

We propose a new class of perspective extractants on the base of calixarenes functionalized with phosphine oxide, carbamoylphosphine oxide or diphosphine dioxide groups. In such compounds the binding groups may be best located around a metal cation, increasing the extraction efficiency and selectivity to a great extent.

Innovative Aspect and Main Advantages

Calix[4]arene alkylphosphine oxides, carbamoylphosphine oxides or diphosphine dioxides developed jointly by the Institute of Organic Chemistry NASU (Kiev) and Khlopin Radium Institute (St. Petersburg) extract simultaneously actinides, lanthanides, technetium and palladium from real HLW hundred times more efficient than the industrial extractants. In three contacts ~ 99,9 % of gross a-activity, more than 98 % of Tc and Pd were recovered from real HLW.

Areas of Application

High-level HLW partitioning technology. Radiowastes management.



Stage of Development

The Institute of Organic Chemistry of the National Academy of Sciences of Ukraine is enable to product the calixarene extractants in kilo scale quantities.

The testing of the calixarene extractants has being successfully performed with the real HLW on the “MAYAK” plant by specialists of the Khlopin Radium Institute, St.-Petersburg, in the framework of the joint project STCU (RUS-09) / ISTC (2068).

Contact Details

Vitaly KALCHENKO Institute of Organic Chemistry National Academy of Sciences of Ukraine
Murmanskaya str. 5, 02660 Kiev-94, Ukraine
Tel 38-044 551 0616
Fax 38-044 573 2643
E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it

Igor SMIRNOV
V. G. Khlopin Radium Institute
2nd Murinskiy Av., 28, 194021, St. Petersburg, Russia
Tel. +7 (812) 297 58 45,
Fax. +7 (812) 297 80 95
E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it

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