Method of treating alpha-active nitrogenous acid solutions, containing trivalent (ferric) iron

Author: O.M. Slyunchev, D.E. Rezchikov

Reference: Patent, 27.10.2004, Ozersk patent holder: Mayak Production Association

Keywords: liquid waste, treatment, evaporation

Abstract: The invention relate to treatment of liquid radioactive wastes. The method consists of preliminary evaporation of the solution with obtainment of regenerated nitric acid and distillation residue. Then, neutralization of the distillation residue to pH1~2, and partial reduction of ferric iron, using sodium sulfite, to mixed valence state of Fe3+:Fe2+=2:1, are conducted.   

URL: http://www.findpatent.ru/patent/225/2257626.html

Method for treating liquid radioactive wastes

Author: S.A. Dmitriev, D.A. Fyodorov, A.E. Savkin, Yu.V. Karlin

Reference: Patent, 19.03.2007, Moscow, patent holder: Moscow State Enterprise – Joint Environmental-Technological Research Center for the disposal of radioactive waste and the protection of the environment (SIA “Radon”)

Keywords: liquid waste, process, filtration

Abstract: The invention relates to environmental protection, in detail, to process of liquid radioactive wastes. The original flow of the liquid waste is subjected to be defended by the formation of supernatant liquid and sludge. The supernatant fluid is clarified with a mechanical filter to form a filtrate; the filtrate is subjected to ion-selective sorption after deep desalting in two stages.

URL: http://www.findpatent.ru/patent/234/2342720.html

Developing measuring systems for radiometric separation of radioactively contaminated soil

Author: A.S. Danilovich

Reference: Dissertation, 2001

Keywords: radioactive waste, contamination, decontamination, safety

URL: http://library.gpntb.ru/cgi-bin/irbis64r_simplesite/cgiirbis_64.exe

SPECIFIC FEATURES OF THE FORMATION OF THE TECHA RIVER RADIOACTIVE CONTAMINATION

Author: Glagolenko Yu.G., Drozhko E.G., Mokrov Yu.G.

Reference: Gazette “ВОПРОСЫ РАДИАЦИОННОЙ БЕЗОПАСНОСТИ“ (Issues on radiation safety), 2007

ISSN: 1816-9643

DOI: 546.42 : 551.48

Keywords: Techa river, beta-emitting radionuclides, alpha-emitting radionuclides, long-lived 90sr and 137cs, Mayak production

Abstract: During 1949-1956 while implementing the State defense program by the Mayak Production Association routine (specified in the detail design) and accidental discharges of the liquid radioactive waste (LRW) into the open hydrographic system of the Techa river were performed. The discharged LRW consisted mainly of beta-emitting radionuclides of fission-fragment origin with half-life from several days to dozens of years and insignificant amounts (traces) of alpha-emitting nuclides (U, Pu, Am). By the middle of the 1960-s practically all the radionuclides contained in the discharged LRW had been subjected to the natural radioactive decay, and the river system radioactive contamination was determined only by the long-lived 90Sr and 137Cs and to a considerably lesser degree by the plutonium (238, 239, 240Pu) and 99Тс. The major part of the activity of the mentioned above radionuclides was deposited upon the swampy flood-plain area (Asanovsky swamps) in the upper Techa river. The following sources of the Techa river water radioactive contamination have been studied in this wok: – sorption-desorption of the activity from the Asanovsky swamps (90Sr); – bottom sediment stirring and activity transfer with suspensions (137Cs, Pu); – overland radioactive run-off from the catchment territory of the Techa river contaminated as a result of accidents occurred in 1957 and 1967 (90Sr, 137Cs); – filtration transfer of the activity from the Techa reservoir cascade (tritium, 90Sr). The data on activity margin of 90Sr, 137Cs, Pu and 99Тс deposited upon different river sections are provided. The analysis of the experimental and calculated data on volumetric activity and radioactive run-off of tritium, 90Sr, 137Cs, 99Tc and plutonium with the Techa river water depending on the water flow in the river is presented.

URL: http://elibrary.ru/item.asp?id=11643606

On the way to solution of the problem of radioactive waste remediation

Author: Goryachev I. V., Gnedenko V. G., Kuznetsov V. D.

Reference: Gazette “АЛЬТЕРНАТИВНАЯ ЭНЕРГЕТИКА И ЭКОЛОГИЯ“ (alternative energetics and ecology) , 2006

ISSN: 1608-8298

Keywords: remediation, decontamination, Kurcharov Institute

Abstract: A short article on remediation of radioactive waste. The author Goryachev and Gnedenko are members of the Kurcharov Institute, Russia’s leading research centre of nuclear energy. In the Soviet regime the institute was a centre for developing nuclear weapons. Most soviet nuclear reactors were built under the surveillance of the institute.

URL: http://isjaee.hydrogen.ru/pdf/5_2006gnedenko_rus.pdf (full article available)

Heterogeneous electrochemical systems for purification of water contaminated with organic complexing agents and radionuclides

Title: Heterogeneous electrochemical systems for purification of water contaminated with organic complexing agents and radionuclides

Author: Gontar I.A., Kozlov K.B., Lavrov B.A.

Reference: Water: chemistry and ecology (Russian: “ВОДА: ХИМИЯ И ЭКОЛОГИЯ“), 2012

ISSN: 2072-8158

Keywords: conductivity, current flow, organic complexing agents, radioactive waste, resistance, wastewater

Abstract: The possibility of purification of liquid radioactive wastes from water dissolved organically complex agents have been discussed. The process was held in electrochemical reactor, its operation is based on the physicochemical processes accompanying the flow of electric current through the phase boundary leading to the chemical transformation of hazardous compounds into harmless gases and water.

URL: http://watchemec.ru/en/article/24679/