Exploring the reactor heat problem: Study of the beta decay of 104,105Tc using the TAS technique
The decay heat of fission products plays an important role in predictions of the heat up of nuclear fuel in reactors. The released energy is calculated as the summation of the activities of all fission products P(t) = SigmaEilambdaiNi(t), where Ei is the decay energy of nuclide i, lambdai, is the de...
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creator | Algora, A. Taín, J. L. Perez, A. B. Rubio, B. Agramunt, J. Caballero, L. Nácher, E. Krasznahorkay, A. Hunyadi, M. D. Gulyás, J. Vitéz, A. Äystö, J. Penttilä, H. Rinta-Antila, S. Moore, I. Eronen, T. Jokinen, A. Nieminen, A. Hakala, J. Karvonen, P. Kankainen, A. Hager, U. Sonoda, T. Burkard, K. Hüller, W. Batist, L. Gelletly, W. Yoshida, T. Nichols, A. L. Sonzogni, A. |
description | The decay heat of fission products plays an important role in predictions of the heat up of nuclear fuel in reactors. The released energy is calculated as the summation of the activities of all fission products P(t) = SigmaEilambdaiNi(t), where Ei is the decay energy of nuclide i, lambdai, is the decay constant of nuclide i and Ni (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 in the t ~ 1000s cooling time for some fuels. A possible explanation to this improper description has been found in the work of Yoshida et al [1], where it has been shown that the incomplete knowledge of the beta-decay of some Tc isotopes can be the source of the systematic discrepancy. Motivated by [1], we have recently measured the beta-decay process of some Tc isotopes using a total absorption spectrometer at the IGISOL facility in Jyvaskyla. The results of the measurements as well as the their consequences on summation calculations are discussed. |
doi_str_mv | 10.1140/epjst/e2007-00353-x |
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L. ; Perez, A. B. ; Rubio, B. ; Agramunt, J. ; Caballero, L. ; Nácher, E. ; Krasznahorkay, A. ; Hunyadi, M. D. ; Gulyás, J. ; Vitéz, A. ; Äystö, J. ; Penttilä, H. ; Rinta-Antila, S. ; Moore, I. ; Eronen, T. ; Jokinen, A. ; Nieminen, A. ; Hakala, J. ; Karvonen, P. ; Kankainen, A. ; Hager, U. ; Sonoda, T. ; Burkard, K. ; Hüller, W. ; Batist, L. ; Gelletly, W. ; Yoshida, T. ; Nichols, A. L. ; Sonzogni, A.</creator><creatorcontrib>Algora, A. ; Taín, J. L. ; Perez, A. B. ; Rubio, B. ; Agramunt, J. ; Caballero, L. ; Nácher, E. ; Krasznahorkay, A. ; Hunyadi, M. D. ; Gulyás, J. ; Vitéz, A. ; Äystö, J. ; Penttilä, H. ; Rinta-Antila, S. ; Moore, I. ; Eronen, T. ; Jokinen, A. ; Nieminen, A. ; Hakala, J. ; Karvonen, P. ; Kankainen, A. ; Hager, U. ; Sonoda, T. ; Burkard, K. ; Hüller, W. ; Batist, L. ; Gelletly, W. ; Yoshida, T. ; Nichols, A. 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Motivated by [1], we have recently measured the beta-decay process of some Tc isotopes using a total absorption spectrometer at the IGISOL facility in Jyvaskyla. The results of the measurements as well as the their consequences on summation calculations are discussed.</description><identifier>ISSN: 1951-6355</identifier><identifier>EISSN: 1951-6401</identifier><identifier>DOI: 10.1140/epjst/e2007-00353-x</identifier><language>eng</language><ispartof>The European physical journal. 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L.</creatorcontrib><creatorcontrib>Sonzogni, A.</creatorcontrib><title>Exploring the reactor heat problem: Study of the beta decay of 104,105Tc using the TAS technique</title><title>The European physical journal. ST, Special topics</title><description>The decay heat of fission products plays an important role in predictions of the heat up of nuclear fuel in reactors. The released energy is calculated as the summation of the activities of all fission products P(t) = SigmaEilambdaiNi(t), where Ei is the decay energy of nuclide i, lambdai, is the decay constant of nuclide i and Ni (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 in the t ~ 1000s cooling time for some fuels. A possible explanation to this improper description has been found in the work of Yoshida et al [1], where it has been shown that the incomplete knowledge of the beta-decay of some Tc isotopes can be the source of the systematic discrepancy. Motivated by [1], we have recently measured the beta-decay process of some Tc isotopes using a total absorption spectrometer at the IGISOL facility in Jyvaskyla. 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The released energy is calculated as the summation of the activities of all fission products P(t) = SigmaEilambdaiNi(t), where Ei is the decay energy of nuclide i, lambdai, is the decay constant of nuclide i and Ni (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 in the t ~ 1000s cooling time for some fuels. A possible explanation to this improper description has been found in the work of Yoshida et al [1], where it has been shown that the incomplete knowledge of the beta-decay of some Tc isotopes can be the source of the systematic discrepancy. Motivated by [1], we have recently measured the beta-decay process of some Tc isotopes using a total absorption spectrometer at the IGISOL facility in Jyvaskyla. 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title | Exploring the reactor heat problem: Study of the beta decay of 104,105Tc using the TAS technique |
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