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Current state of nuclear fuel cycles in nuclear engineering and trends in their development according to the environmental safety requirements

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Abstract

The state and trends in the development of nuclear fuel cycles in nuclear engineering, taking into account the ecological aspects of using nuclear power plants, are considered. An analysis of advantages and disadvantages of nuclear engineering, compared with thermal engineering based on organic fuel types, was carried out. Spent nuclear fuel (SNF) reprocessing is an important task in the nuclear industry, since fuel unloaded from modern reactors of any type contains a large amount of radioactive elements that are harmful to the environment. On the other hand, the newly generated isotopes of uranium and plutonium should be reused to fabricate new nuclear fuel. The spent nuclear fuel also includes other types of fission products. Conditions for SNF handling are determined by ecological and economic factors. When choosing a certain handling method, one should assess these factors at all stages of its implementation. There are two main methods of SNF handling: open nuclear fuel cycle, with spent nuclear fuel assemblies (NFAs) that are held in storage facilities with their consequent disposal, and closed nuclear fuel cycle, with separation of uranium and plutonium, their purification from fission products, and use for producing new fuel batches. The development of effective closed fuel cycles using mixed uranium–plutonium fuel can provide a successful development of the nuclear industry only under the conditions of implementation of novel effective technological treatment processes that meet strict requirements of environmental safety and reliability of process equipment being applied. The diversity of technological processes is determined by different types of NFA devices and construction materials being used, as well as by the composition that depends on nuclear fuel components and operational conditions for assemblies in the nuclear power reactor. This work provides an overview of technological processes of SNF treatment and methods of handling of nuclear fuel assemblies. Based on analysis of modern engineering solutions on SNF regeneration, it has been concluded that new reprocessing technologies should meet the ecological safety requirements, provide a more extensive use of the resource base of nuclear engineering, allow the production of valuable and trace elements on an industrial scale, and decrease radioactive waste release.

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Authors and Affiliations

  1. OAO SverdNIIkhimmash, ul. Griboedova 32, Yekaterinburg, 620010, Russia

    I. S. Vislov

  2. Seversk Technological Institute, National Research Nuclear University, MEPhI, pr. Kommunisticheskii 65, Seversk, 636036, Russia

    V. P. Pischulin

  3. Tomsk Polytechnic University, pr. Lenina 30, Tomsk, 634050, Russia

    S. N. Kladiev & S. M. Slobodyan

  4. Omsk State Technical University, pr. Mira 11, Omsk, 644050, Russia

    S. M. Slobodyan

Authors
  1. I. S. Vislov
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  2. V. P. Pischulin
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  3. S. N. Kladiev
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  4. S. M. Slobodyan
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Correspondence to S. M. Slobodyan.

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Original Russian Text © I.S. Vislov, V.P. Pischulin, S.N. Kladiev, S.M. Slobodyan, 2016, published in Teploenergetika.

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Vislov, I.S., Pischulin, V.P., Kladiev, S.N. et al. Current state of nuclear fuel cycles in nuclear engineering and trends in their development according to the environmental safety requirements. Therm. Eng. 63, 581–586 (2016). https://doi.org/10.1134/S0040601516050104

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