All Russia Research Institute of Radiology and Agroecology VNIIRAE

Obninsk, Russia

All Russia Research Institute of Radiology and Agroecology VNIIRAE

Obninsk, Russia
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Spiridonov S.I.,All Russia Research Institute of Radiology and Agroecology VNIIRAE | Perevolotskii A.N.,All Russia Research Institute of Radiology and Agroecology VNIIRAE | Aleksakhin R.M.,Innovation Technology Center for Project Breakthrough soryv | Spirin E.V.,Innovation Technology Center for Project Breakthrough soryv | Vlaskin G.N.,Innovation Technology Center for Project Breakthrough soryv
Atomic Energy | Year: 2017

The aim of this work is to validate the extraction parameters of fission products and actinides from the spent nuclear reactor fuel of the BREST-OD-300 reactor on the basis of the concept of radio-ecological balance. The dose loads due to long-lived high-level wastes and natural uranium are compared for humans. Different variants of extraction of fissile materials U, Pu, and Np from spent fuel with residual content in the wastes 0.1–1% of the initial content and americium with residual content in the wastes 0.1–10% of the initial content with decay period of the spent fuel in the range 1–100 years were taken as initial data. It was found that for the indicated variants of reprocessing it is impossible to achieve radioecological balance for humans after 500 years without extracting 99Tc with residual content in the wastes not exceeding 5% of the initial content in the spent fuel. The time to achieve balance can be reduced to 300 years with additional extraction of 137Cs. © 2017 Springer Science+Business Media New York


Spiridonov S.I.,All Russia Research Institute of Radiology and Agroecology VNIIRAE | Aleksakhin R.M.,All Russia Research Institute of Radiology and Agroecology VNIIRAE | Spirin E.V.,Innovation and Technology Center for the Proryv Project
Atomic Energy | Year: 2015

The collective dose is examined as an integral characteristic of the radiological effect of nuclear fuel cycle enterprises on the general population. A relation is obtained for evaluating the ecological factor, which takes account of the specifics of radionuclides from the standpoint of their migration capacity and the particularities of dose load formation. The ecological factors are calculated for 241Am, 242mAm, 242Am, 243Am, 242Cm, 243Cm, 244Cm, 245Cm, 246Cm, 247Cm, 248Cm, 237Np, 238Pu, 239Pu, 240Pu, 241Pu, 242Pu, 244Pu, 235U, 236U, and 238U. Links where the activity of the daughter radionuclides was taken as equal to the activity of long-lived precursors are singled out in the decay chains of the actinides. The dynamics of the yearly collective dose for the general population, formed by individual actinides with activity 1 Bq in the emissions and their decay products, for a long period of time is calculated. The results are suitable for performing comparative radioecological assessments of enterprises in open and closed nuclear fuel cycles. © 2015 Springer Science+Business Media New York


Aleksakhin R.M.,Innovation Technology Center for Project Breakthrough soryv | Spirin E.V.,Innovation Technology Center for Project Breakthrough soryv | Solomatin V.M.,Innovation Technology Center for Project Breakthrough soryv | Spiridonov S.I.,All Russia Research Institute of Radiology and Agroecology VNIIRAE
Atomic Energy | Year: 2016

The particularities of the formation of the potential biological danger of actinides and fission products in time and the influence of the migration factor on it are examined. The calculation of the dose characteristics of long-lived radionuclides took account of the effect of internal and external irradiation on humans. The internal irradiation dose was calculated taking account of the transfer of radionuclides from soil into food products. It was found that the actinides, 90Sr and 137C, make the main contribution to the biological danger for 500 years, and are followed by americium and 99Tc from the fission products. The separation of 99% of the americium and technetium (which can be transmuted) from the irradiated fuel is optimal for satisfying the principle of radiation equivalence. The use of nitride fuel in fast reactors requires special attention to isolation of 14C from the environment. It was shown that taking account of the presence of agricultural lands in the action zone of enterprises in the pilot demonstration power complex softens the requirements of admissible carbon emission in the gas phase with absolute satisfaction of the safety requirements for the effect on the general public. © 2016 Springer Science+Business Media New York


Spiridonov S.I.,All Russia Research Institute of Radiology and Agroecology VNIIRAE | Aleksakhin R.M.,All Russia Research Institute of Radiology and Agroecology VNIIRAE | Spirin E.V.,Center for Innovation and Technology for Project Proryv
Atomic Energy | Year: 2015

An approach to evaluating a generalized index of the radiation effect of NFC objects on biota is proposed. The effect of the radiation factor on the collection of representative natural organisms belonging to difference taxonomic groups is taken into account. The change in the proposed index for individual actinides flowing with activity 1 MBq into the environment and their decay products is calculated. The actinides present in spent fuel are considered in the calculations: 241,242m,242,243Am, 242–248Cm, 237Np, 238–242,244Pu, and 235,236,238U. The index developed is suitable for radioecological assessment of the objects of open and closed fuel cycles. The results of such assessment are an important element of the environmental validation of new nuclear power technologies. © 2015 Springer Science+Business Media New York

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