Integral data assimilation of the MERCI-1 experiment for the nuclear data associated with the PWR decay heat computation
| Autor: | C. Reynard-Carette, J. Huyghe, C. De Saint-Jean, V. Vallet, D. Lecarpentier, C. Vaglio-Gaudard |
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| Přispěvatelé: | CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Service de Physique des Réacteurs et du Cycle (SPRC), Département Etude des Réacteurs (DER), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), EDF (EDF), Institut des Matériaux, de Microélectronique et des Nanosciences de Provence (IM2NP), Aix Marseille Université (AMU)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU) |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
[PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th]
Fission QC1-999 Nuclear engineering Shutdown fission yield data [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex] 01 natural sciences 7. Clean energy integral experiment 0103 physical sciences covariances Decay heat 010306 general physics Dimensioning 010308 nuclear & particles physics Physics Nuclear data MERCI-1 Covariance nuclear data Nuclear reactor core decay heat Assimilation Environmental science Radioactive decay |
| Zdroj: | EPJ Web of Conferences EPJ Web of Conferences, 2019, 211, pp.07004. ⟨10.1051/epjconf/201921107004⟩ EPJ Web of Conferences, EDP Sciences, 2019, 211, pp.07004. ⟨10.1051/epjconf/201921107004⟩ EPJ Web of Conferences, Vol 211, p 07004 (2019) |
| ISSN: | 2100-014X |
| DOI: | 10.1051/epjconf/201921107004⟩ |
| Popis: | WONDER-2018 – 5th International Workshop On Nuclear Data Evaluation for Reactor applications. 8-12 octobre 2018, Aix-en-Provence, France; International audience; Nuclear decay heat is a crucial issue for PWR in-core safetyafter reactor shutdown and back-end cycle. It is a dimensioning parameterfor safety injection systems (SIS) to avoid a dewatering of the reactor core.The decay heat uncertainty needs to be controlled over the largest range ofapplications. The assimilation of the MERCI-1 experiment was studied toprovide feedbacks on nuclear data. This experiment consisted in themeasurement of the decay heat of a PWR UOX fuel sample irradiated inthe OSIRIS reactor, for cooling times between 45 minutes and 42 days.More specifically, the consideration of several experimental values ofMERCI-1 at different cooling times was tested. This raised issues aboutcorrelations to consider between different measurements. Besides, theimpact of considering correlations between independent fission yields incovariance matrices on the decay heat uncertainty calculation and on thefeedbacks on nuclear data is discussed. |
| Databáze: | OpenAIRE |
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