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Communication Dans Un Congrès Année : 2023

Effect of oxygen on gas emitted from polymer irradiated using Swift Heavy Ion beams

Muriel Ferry
  • Fonction : Auteur
Stéphane Esnouf
  • Fonction : Auteur
Balanzat Emmanuel
  • Fonction : Auteur
Frederic Lepretre
  • Fonction : Auteur
Celine Cabet
Markus Bender
  • Fonction : Auteur
Daniel Severin
  • Fonction : Auteur
Yvette Ngono-Ravache
  • Fonction : Auteur

Résumé

At the end of their life, polymers used in the nuclear industry may be contaminated with fission and activation products and can eventually contain long-lived α emitting radionuclides. In this case, they are placed in intermediate level long lived waste (IL-LLW) packages. For safety reasons, the amount of inflammable and corrosive gases produced by radiolysis has to be estimated at each step of the waste management life cycle, from production to final disposal. Experimentally, radiolysis of these materials is investigated by irradiating them under different conditions: γ irradiations are usually used to simulate the β and γ radiations, because the energy deposition in polymers is roughly equivalent for these two types of radiation. The simulation of α-irradiation is problematic because the stopping power of alpha particles variates through the materials thickness (given their short path length, extremely thin materials are needed) and implementation on a large number of samples is difficult. We overcome this problem by using particle accelerators delivering ions with Linear Energy Transfers values equivalent to those provided by α-particles. This approach was validated under inert atmosphere via simulations and by experiments presented in the literature [1-2]. Since IL-LLW packages are stored and will be disposed of in the presence of oxygen and given the reactivity and the sensitivity of the different reaction mechanisms in a oxidizing atmosphere, the question of the validity in the presence of oxygen of this approach has to be addressed. This presentation provides preliminary results obtained by using different ion beams accelerators (GANIL, GSI, JANNuS).
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Dates et versions

cea-04151761 , version 1 (05-07-2023)

Identifiants

  • HAL Id : cea-04151761 , version 1

Citer

Muriel Ferry, Stéphane Esnouf, Balanzat Emmanuel, Frederic Lepretre, Celine Cabet, et al.. Effect of oxygen on gas emitted from polymer irradiated using Swift Heavy Ion beams. PDDG, Jun 2023, Dubrovnik, Croatia. ⟨cea-04151761⟩
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