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Communication Dans Un Congrès Année : 2010

Simulation of 235U and 239Pu decay heat using selected beta decay data in the framework of reactor antineutrino experiments

Résumé

Precise knowledge of beta decay properties of 235U and 239Pu fission products is extremely important to calculate the energy realized in a reactor core after the fission process ends. The estimation of this decay heat is a major safety concern in reactor technology. The beta decay data were selected among different evaluated nuclear databases combined to experimental data (ENSDF, Total Absorption Spectroscopy measurements, Rudstam et al.' measurements, JENDL Gross Theory spectra...) in order to better reproduce antineutrino emission spectra after such fissions. Taking advantage of the studies of the different available nuclear databases containing beta decay properties of the fission products performed in the framework of the Double Chooz experiment, a new simulation of the decay heat released after the fission of 235U and 239Pu will be performed using the individual contributions of the fission products. Our study allowed us to select a list of fission product nuclei needing extra measurements of decay properties to better reconstruct the emitted antineutrino spectrum. We will present, among these nuclei, the ones which are interesting for the decay heat calculation and how we intent to better measure their decay properties. The measurements of a first group of nuclei by using the TAGS technique have been accepted by the JYFL (Jyvaskyla-Finland) and will be performed in collaboration with the already existing TAGS collaboration lead by the Valencia team (Spain, J.L. Tain, A. Algora et al).
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Dates et versions

hal-04568417 , version 1 (04-05-2024)

Identifiants

  • HAL Id : hal-04568417 , version 1

Citer

Amanda Porta, Bui V.M., Fallot M., Giot L., Martino J., et al.. Simulation of 235U and 239Pu decay heat using selected beta decay data in the framework of reactor antineutrino experiments. 2010 International Congress on Advances in Nuclear Power Plants - ICAPP '10, Jun 2010, San Diego, CA, United States. ⟨hal-04568417⟩
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