Thermal treatment for radioactive waste minimisation

Nieminen, Matti; Olin, Markus; Laatikainen-Luntama, Jaana; Wickham, Stephen M.; Doudou, S.; Fuller, Adam J.; Kent, J. E.; Fournier, Maxime; Clarke, S.; Scales, Charlie R.; Hyatt, Neil C.; Walling, Sam A.; Gardner, Laura J.; Catherin, Stéphane; Frasca, B.

doi:10.1051/epjn/2019040

Cited by 5 publications

(4 citation statements)

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“…Predisposal and disposal technology developments, [22] is becoming a pillar domain of Euratom. It will require involvement of waste producers, technology developers and Research Entities (RE) in general.…”

Section: Part 1: Safety Research and Training Of Reactor Systemsmentioning

confidence: 99%

Euratom Research and Training in 2019: challenges, achievements and future perspectives

Garbil

Davies

Diaconu

2020

EPJ Nuclear Sci. Technol.

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The development and safe operation of nuclear installations in Europe is of vital importance for the future of nuclear energy. Helping to ensure the safe operation of nuclear power has always been one of the top priorities of Euratom Research Framework Programmes. With the incentives of Horizon 2020, further integration towards an EU/Euratom Research Area was achieved, better prioritisation at European and International levels based on updates of Research and Innovation agendas or deployment strategies, capitalisation of European Technology platforms and enhanced cooperation with International Organisations or Fora effectively happened. Evolutions towards European Joint Programmes together with EU/Euratom Member States, confirm that research and innovation programmes successfully benefit from a truly added value of a concerted European approach in nuclear safety research and training advocated by the European Commission and EU/Euratom Member States.

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Section: Part 1: Safety Research and Training Of Reactor Systemsmentioning

confidence: 99%

Euratom Research and Training in 2019: challenges, achievements and future perspectives

Garbil

Davies

Diaconu

2020

EPJ Nuclear Sci. Technol.

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“…Effective volume reduction of solid organic waste can be achieved by thermal treatments, such as incineration, gasification, pyrolysis and plasma treatments. Moreover, thermal treatments can improve the homogeneity and stability of the waste produced following treatment [1,2].…”

Section: Introductionmentioning

confidence: 99%

“…Pyrolysis, i.e., the process of thermal decomposition of organics in the absence of oxygen, produces three main products: solid char, condensable oils and organic and inorganic gases [3]. The metal radionuclides are expected to remain in the char solid waste fraction and not to migrate into the condensable and gas fractions [1]. Pyrolysis has several key advantages over other thermal processes.…”

Section: Introductionmentioning

confidence: 99%

“…Whereas product selectivity and the generation of valuable products are critical goals for the pyrolysis of municipal solid waste [6], it is not required for volume reduction of radioactively-contaminated plastics [1]. To be considered a suitable thermal treatment for the minimization of radio-contaminated organic waste, three main goals need to be met: (i) significantly reduce waste volume into char; (ii) minimize secondary waste and (iii) maximize gas yields.…”

Section: Introductionmentioning

confidence: 99%

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Catalytic Pyrolysis of High-Density Polyethylene: Decomposition Efficiency and Kinetics

Raveh-Amit¹,

Lemont

Bar-Nes

et al. 2022

Catalysts

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Organic waste is generally characterized by high volume-to-weight ratios, requiring implementation of waste minimization processes. In the present study, the decomposition of high-density polyethylene (HDPE), was studied under thermal and catalytic pyrolysis conditions on two experimental systems. Firstly, pyrolytic conditions for HDPE decomposition were optimized in a laboratory-scale batch reactor. In order to maximize gas yields and minimize secondary waste, the effects of aluminosilicate catalysts, catalyst loading, and reaction temperature on decomposition efficiency were examined. Secondly, kinetics and reaction temperatures were studied on a large capacity thermobalance, especially adjusted to perform experiments under pyrolytic conditions at a larger scale (up to 20 g). The addition of catalysts was shown to enhance polymer decomposition, demonstrated by higher gas conversions. Condensable yields could be further minimized by increasing the catalyst to polymer ratio from 0.1 to 0.2. The most prominent reduction in pyrolysis temperature was obtained over ZSM-5 catalysts with low Si/Al ratios; however, this impact was accompanied by a slower reaction rate. Of the zeolites tested, the ZSM-5 catalyst with a Si/Al of 25 was found to be the most efficient catalyst for waste minimization and organic destruction, leading to high gas conversions (~90 wt%.) and a 30-fold reduction in solid waste mass.

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