Applications of the total absorption technique to improve reactor decay heat calculations: study of the beta decay of 102,104,105Tc

A. Algora, D. Jordan, J. L. Taín, B. Rubio, J. Agramunt, A. B. Perez-Cerdan, F. Molina, L. Caballero, E. Nácher, A. Krasznahorkay, M. D. Hunyadi, J. Gulyás, A. Vitéz, M. Csatlós, L. Csige, J. Äystö, H. Penttilä, I. D. Moore, T. Eronen, A. JokinenA. Nieminen, J. Hakala, P. Karvonen, A. Kankainen, A. Saastamoinen, J. Rissanen, T. Kessler, C. Weber, J. Ronkainen, S. Rahaman, V. Elomaa, U. Hager, S. Rinta-Antila, T. Sonoda, K. Burkard, W. Hüller, L. Batist, W. Gelletly, T. Yoshida, A. L. Nichols, A. Sonzogni, K. Peräjärvi

Resultado de la investigación: Contribución a los distintos tipos de conferenciaArtículo

2 Citas (Scopus)

Resumen

The decay heat of the fission products plays an important role in predicting the heat-up of nuclear fuel after reactor shutdown. This form of energy release is calculated as the sum of the energy-weighted activities of all fission products P(t) = Σ.EiλiN i(t), where Ei; is the decay energy of nuclide i (gamma and beta component), λ,- is the decay constant of nuclide i and N i(t) is the number of nuclide i at cooling time t. Even though the reproduction of the measured decay heat has improved in recent years, there is still a long standing discrepancy at t - 1000s cooling time for some fuels. A possible explanation for this disagreement can been found in the work of Yoshida et al. [1], who demonstrated that an incomplete knowledge of the β-decay of some Tc isotopes could be the source of the systematic discrepancy. Motivated by [1], we have recently measured the β -decay process of some Tc isotopes using a total absorption spectrometer at the IGISOL facility in Jyväskylä. The results of the measurements are discussed, along with their impact on summation calculations. © 2009 American Institute of Physics.
Idioma originalInglés
Páginas207-214
Número de páginas8
DOI
EstadoPublicada - 23 abr 2009
Publicado de forma externa
EventoAIP Conference Proceedings -
Duración: 25 may 2016 → …

Conferencia

ConferenciaAIP Conference Proceedings
Período25/05/16 → …

Áreas temáticas de ASJC Scopus

  • Física y astronomía (todo)

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