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Journal Articles

The Joint evaluated fission and fusion nuclear data library, JEFF-3.3

Plompen, A. J. M.*; Cabellos, O.*; De Saint Jean, C.*; Fleming, M.*; Algora, A.*; Angelone, M.*; Archier, P.*; Bauge, E.*; Bersillon, O.*; Blokhin, A.*; et al.

European Physical Journal A, 56(7), p.181_1 - 181_108, 2020/07

 Times Cited Count:234 Percentile:99.41(Physics, Nuclear)

The Joint Evaluated Fission and Fusion nuclear data library 3.3 is described. New evaluations for neutron-induced interactions with the major actinides $$^{235}$$U, $$^{238}$$U and $$^{239}$$Pu, on $$^{241}$$Am and $$^{23}$$Na, $$^{59}$$Ni, Cr, Cu, Zr, Cd, Hf, W, Au, Pb and Bi are presented. It includes new fission yileds, prompt fission neutron spectra and average number of neutrons per fission. In addition, new data for radioactive decay, thermal neutron scattering, gamma-ray emission, neutron activation, delayed neutrons and displacement damage are presented. JEFF-3.3 was complemented by files from the TENDL project. The libraries for photon, proton, deuteron, triton, helion and alpha-particle induced reactions are from TENDL-2017. The demands for uncertainty quantification in modeling led to many new covariance data. A comparison between results from model calculations using the JEFF-3.3 library and those from benchmark experiments for criticality, delayed neutron yields, shielding and decay heat, reveals that JEFF-3.3 is excellent for a wide range of nuclear technology applications, in particular nuclear energy.

Journal Articles

Ion specific effects on the structure of molten AF-ZrF$$_4$$ systems (A$$^+$$ = Li$$^+$$, Na$$^+$$, and K$$^+$$)

Pauvert, O.*; Salanne, M.*; Zanghi, D.*; Simon, C.*; Reguer, S.*; Thiaudi$`e$re, D.*; Okamoto, Yoshihiro; Matsuura, Haruaki*; Bessada, C.*

Journal of Physical Chemistry B, 115(29), p.9160 - 9167, 2011/07

 Times Cited Count:62 Percentile:81.96(Chemistry, Physical)

The structure of molten AF-ZrF$$_4$$ system (A$$^+$$=Li$$^+$$, Na$$^+$$, K$$^+$$) is studied using EXAFS spectroscopy with molecular dynamics simulations. From the Zr$$^{4+}$$ solvation shell point of view, we observe a progressive stabilization of the 7-fold and then of the 6-fold coordinated complexes when passing from Li$$^+$$ to Na$$^+$$ and K$$^+$$ as a "counterion". Particular attention is given to the systems consisting of 35 mol% of ZrF$$_4$$. At that particular composition, the ZrF$$_6$$$$^{2-}$$ complex predominates largely whatever the nature of the alkali. The calculated vibrational properties of this complex are in excellent agreement with a previous Raman spectroscopy experiment on molten KF-ZrF$$_4$$. The most important differences are observed for the lifetime of these octahedral units. On a larger scale, an intense first sharp diffraction peak is observed for the Zr$$^{4+}$$-Zr$$^{4+}$$ partial structure factor, which can be attributed to the correlations between the octahedral units formed.

Journal Articles

In situ experimental evidence for a nonmonotonous structural evolution with composition in the molten LiF-ZrF$$_4$$ system

Pauvert, O.*; Zanghi, D.*; Salanne, M.*; Simon, C.*; Rakhamatullin, A.*; Matsuura, Haruaki*; Okamoto, Yoshihiro; Vivet, F.*; Bessada, C.*

Journal of Physical Chemistry B, 114(19), p.6472 - 6479, 2010/05

 Times Cited Count:59 Percentile:79.5(Chemistry, Physical)

The structure of the molten LiF-ZrF$$_4$$ system up to 50 mol% ZrF$$_4$$ was investigated by combining high-temperature nuclear magnetic resonance (NMR) and extended X-ray absorption fine structure (EXAFS) experiments with molecular dynamics (MD) calculations. $$^{91}$$Zr high-temperature NMR experiments give an average coordination of 7 for the zirconium ion on all domains of composition. MD simulations, in agreement with EXAFS experiments at the K-edge of Zr, provide evidence for the coexistence of three different Zr-based complexes, [ZrF$$_6$$]$$^{2-}$$, [ZrF$$_7$$]$$^{3-}$$, and [ZrF$$_8$$]$$^{4-}$$, in the melt.

Journal Articles

Aqueous solutions of uranium(VI) as studied by time-resolved emission spectroscopy; A Round-robin test

Billard, I.*; Ansoborlo, E.*; Apperson, K.*; Arpigny, S.*; Azenha, M.-E.*; Birch, D.*; Bros, P.*; Burrows, H. D.*; Choppin, G. R.*; Couston, L.*; et al.

Applied Spectroscopy, 57(8), p.1027 - 1038, 2003/08

 Times Cited Count:50 Percentile:88.25(Instruments & Instrumentation)

no abstracts in English

Oral presentation

Characterization of fuel debris (27'A), 8; Characterization of MCCI test products for post severe accident

Yano, Kimihiko; Kitagaki, Toru; Ogino, Hideki; Washiya, Tadahiro; Pascal, P.*; Jean-Fran$c{c}$ois, H.*; Patricia, C.*; Anne, B.*; Brissonneau, L.*; Brigitte, T.*; et al.

no journal, , 

In a collaborative agreement with Commissariat $`a$ l'$'e$nergie atomique et aux $'e$nergies alternatives (CEA), the characterization of MCCI products was carried out using the materials that CEA produced in its past large-scale MCCI test. Samples of a corium oxide phase and an interface of corium/concrete phases were selected. They were observed by SEM/EDS and measured by Vickers Hardness Tester.

Oral presentation

Roles of hydration for inducing DNA strand breaks by ionization of oxygen K-shell electrons

Fujii, Kentaro; Izumi, Yudai; Krishna, G.*; Pablo, L.-T.*; Alain, T.*; Rodolphe, V.*; Marie-Pierre, G.*; Marie-Francoise, P.*; Marie-Anne, H.*; Yokoya, Akinari

no journal, , 

In order to reveal the role of hydration water regarding ionization the constituent atoms, we measured a mass spectrum of ions desorbing from hydrated deoxyribose (dR) films exposed to monochromatic soft X-rays (560 eV). Desorbing positive ions were detected by a quadrupole mass spectrometer to examine the effect of Coulomb explosion of valence holes produced as a result of Auger decay after the ionization. The yield of desorbing ions which were produced by the destruction of the furanose ring structure of dR, obviously suppressed when one layer of water molecules was deposited onto the film. This result suggests that the hydration water layer on the film inhibits the intense destruction of the furanose induced by the ionization of K-shell electrons of oxygen, or the desorption of the resulting fragment ions from the sample film.

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