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Radiolysis in H2O/D2O mixtures. Hydrogen production under LOCA simulation

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Abstract

The hydrogen isotope radiolytic yields, G(H2), G(HD) and G(D2) were determined in H2O/D2O mixtures under chemical conditions close to a LOCA in a PHWR like Atucha I Nuclear Station, that is 2·10−3 MH3BO3 and p(H+D)=8.5±0.2. The total hydrogen radiolytic yield G(H2+HD+D2) as a function of the deuterium atom fraction goes through a flat maximum at about 0.58. This result in dicates that the 4% flammability limit for hydrogen in the reactor's containment with be reached sooner than what is expected assuming a linear combination of pure H2 and D2 radiolytic yields. Hydrogen radiolytic production in 10−3 M KBr in H2O/D2O mixtures gives the same results as in the boric solutions suggesting a bimolecular B(OH) −4 +OH reaction. Identical isotope concentration factors were calculated for both solutions.

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  1. Departamento Química de Reactores, Comisión Nacional de Energía Atómica, Avda. del Libertador 8250, 1429, Buenos Aires, Argentina

    L. García Rodenas, S. P. Alí & S. J. Liberman

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  1. L. García Rodenas
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  2. S. P. Alí
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  3. S. J. Liberman
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Rodenas, L.G., Alí, S.P. & Liberman, S.J. Radiolysis in H2O/D2O mixtures. Hydrogen production under LOCA simulation. Journal of Radioanalytical and Nuclear Chemistry, Articles 141, 289–294 (1990). https://doi.org/10.1007/BF02035796

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  • DOI: https://doi.org/10.1007/BF02035796

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