Authors & Affiliations

Skomorokhova S.N., Bogdanovich N.G., Martynov P.N., Askhadullin R.Sh., Yagodkin I.V. , Nikolaev A.N., Trifanova E.M., Grushicheva E.A., Sitnikov I.V.
A.I. Leypunsky Institute for Physics and Power, Obninsk, Russia

Abstract

The specific composition of the liquid radioactive waste (LRW) with a high content of chemically toxic salts Pb (Pb-Bi) involves the development of new technological methods of treatment and conditioning of liquid radioactive waste. Experimentally confirmed the feasibility of new way for LRW processing and conditioning of laundering and decontamination solutions, special laundry treatment based on physical-chemical processes: reagent and filtration stage, catalytic thermal oxidative-reductive destruction, radionuclides and organic components sorption, coagulation and sedimentation, microfiltration separation of suspensions and immobilizing concentrates and sorbents in to slag-alkaline cement matrix. Technological process perfected in model samples of plants from the reaction vessel to 40 liters, providing a full cycle of the LRW. Achieved by reducing the volume of liquid radioactive waste in 2-50 times depending on the type of liquid radioactive waste recycled. Perspective initial materials for carrying out process, and also parameters and structures of compoundings for slag-alkaline cementation of the slimes, the fulfilled sorbents on a new technological way are recommended. Synthesise compounds with filling on radioactive sludges and sorbents – up to 35 and 30 wt.%, respectively, the main indicators of quality of which correspond to the NP-019-2000: mechanical strength axial compression – 9-20 MPa, the leaching rate of 137Cs in the water – ≤10-4g/cm2·d. Conducted detailed working out and optimization of the process to create a production plant for the LRW processing of RF with HLMC.

Keywords
liquid radioactive waste (LRW), treatment, conditioning, sorption of radionuclides, the catalytic destruction, microfiltration, immobilization, cementation, alkali-slag binders, matrix material, quality parameters of compounds

Article Text (PDF)

References

UDC 621.039.58 : 621.039.7

Problems of Atomic Science and Technology. Series: Nuclear and Reactor Constants, issue 4:6, 2015