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Study of thermal and radiation stability of the extractant based on CMPO in fluorinated sulfones

Published online by Cambridge University Press:  27 December 2016

S.V. Stefanovsky ,
I.V. Skvortsov ,
E.V. Belova  and
A.V. Rodin
S.V. Stefanovsky*
Affiliation:
A.N. Frumkin Institute of Physical Chemistry and Electrochemistry RAS, Moscow 119071, Russia
I.V. Skvortsov
Affiliation:
A.N. Frumkin Institute of Physical Chemistry and Electrochemistry RAS, Moscow 119071, Russia
E.V. Belova
Affiliation:
A.N. Frumkin Institute of Physical Chemistry and Electrochemistry RAS, Moscow 119071, Russia
A.V. Rodin
Affiliation:
A.N. Frumkin Institute of Physical Chemistry and Electrochemistry RAS, Moscow 119071, Russia Scientific and Engineering Centre for Nuclear and Radiation Safety, Moscow 107140, Russia
*
*(Email: serge.stefanovsky@yandex.ru)
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Abstract

The two-phase systems of pure diluent FS-13 – aqueous solution of 14 mol/L nitric acid and 0.02 mol/L solution of CMPO in diluent FS-13 – aqueous solution of 14 mol/L HNO3 were studied at autoclave temperatures 170 °C and 200 °C. The effect of pre-irradiation on the kinetics of thermolysis was determined. All samples were irradiated using an electron accelerator at a dose rate of 10 kGy/h up to absorbed doses of 0.1, 0.5 and 1 MGy. The parameters of heat and gas emissions were determined during thermolysis of the studied extraction system in a closed apparatus. It has been shown that the conditions required for the growth of autocatalytic oxidation are not created during heating of the two-phase systems in closed vessels even for the extraction systems contacted with 14 mol/l HNO3 for two weeks.

Keywords

electron irradiationnuclear materialswaste management
Type
Articles
Information
MRS Advances , Volume 2 , Issue 12: Scientific Basis for Nuclear Waste Management XL , 2017 , pp. 641 - 647
Copyright
Copyright © Materials Research Society 2016 

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References

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