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Journal Articles

Uncertainty quantification for severe-accident reactor modelling; Results and conclusions of the MUSA reactor applications work package

Brumm, S.*; Gabrielli, F.*; Sanchez Espinoza, V.*; Stakhanova, A.*; Groudev, P.*; Petrova, P.*; Vryashkova, P.*; Ou, P.*; Zhang, W.*; Malkhasyan, A.*; et al.

Annals of Nuclear Energy, 211, p.110962_1 - 110962_16, 2025/02

 Times Cited Count:6 Percentile:93.24(Nuclear Science & Technology)

Journal Articles

Modulating molecular interactions in extruded pea protein isolate

Muhialdin, B. J.*; Sanchez, C. F.*; Nakagawa, Hiroshi; Ubbink, J.*

Food Biophysics, 19(1), p.172 - 181, 2024/03

 Times Cited Count:2 Percentile:21.10(Food Science & Technology)

The impact of molecular interactions on the physical properties of extruded pea protein isolate (PPI) is investigated by adding interaction-modulating compounds to the matrix premix and studying the resulting variations in mechanical and physicochemical properties. Blends of PPI containing either sodium phosphate, urea, sodium dodecylsulphate and beta-mercaptoethanol, as well as with all four compounds and only with deionized water were extruded into thin strands using a lab-scale twin-screw extruder. The hardness from texture profile analysis was the lowest for matrices extruded with beta-mercaptoethanol and with all four chemicals, and highest for the control sample. The water holding capacity of the matrices is lowest for the beta-mercaptoethanol-containing matrix. Our results confirm the importance of disulfide bonds in texturized PPI and show that hydrophobic and electrostatic interactions play auxiliary roles in modulating the properties of extruded PPI matrices.

Journal Articles

Large collectivity in $$^{29}$$Ne at the boundary of the island of inversion

Revel, A.*; Wu, J.*; Iwasaki, Hironori*; Ash, J.*; Bazin, D.*; Brown, B. A.*; Chen, J.*; Elder, R.*; Farris, P.*; Gade, A.*; et al.

Physics Letters B, 838, p.137704_1 - 137704_7, 2023/03

 Times Cited Count:3 Percentile:60.26(Astronomy & Astrophysics)

no abstracts in English

Journal Articles

Status of the uncertainty quantification for severe accident sequences of different NPP-designs in the frame of the H-2020 project MUSA

Brumm, S.*; Gabrielli, F.*; Sanchez-Espinoza, V.*; Groudev, P.*; Ou, P.*; Zhang, W.*; Malkhasyan, A.*; Bocanegra, R.*; Herranz, L. E.*; Berda$"i$, M.*; et al.

Proceedings of 10th European Review Meeting on Severe Accident Research (ERMSAR 2022) (Internet), 13 Pages, 2022/05

Journal Articles

Development of a reference database for beta-delayed neutron emission

Dimitriou, P.*; Dillmann, I.*; Singh, B.*; Piksaikin, V.*; Rykaczewski, K. P.*; Tain, J. L.*; Algora, A.*; Banerjee, K.*; Borzov, I. N.*; Cano-Ott, D.*; et al.

Nuclear Data Sheets, 173, p.144 - 238, 2021/03

 Times Cited Count:33 Percentile:95.41(Physics, Nuclear)

$$beta$$-delayed neutron emission has been of interest since the discovery of nuclear fission. In nuclear power reactors, delayed-neutron data play a crucial role in reactor kinetics calculations and safe operation. $$beta$$-delayed neutron data also have a significant impact in the field of nuclear structure and astrophysics especially as nuclei farther away from stability are explored at the new generation of radioactive beam facilities. Several compilations of $$beta$$-decay half-lives and delayed-neutron emission probabilities are available, however, complete documentation of measurements and evaluation procedures is often missing for these properties. Efforts to address this gap in nuclear data and create an updated compilation and evaluation of $$beta$$-delayed neutron properties were undertaken under the auspices of the International Atomic Energy Agency (IAEA) which formed a Coordinated Research Project (CRP) on "Development of a Reference Database of Beta-delayed Neutron Emission Data". In this paper we summarize the work that was performed and present the results of the CRP.

Journal Articles

Systematic measurements and analyses for lead void reactivity worth in a plutonium core and two uranium cores with different enrichments

Fukushima, Masahiro; Goda, J.*; Oizumi, Akito; Bounds, J.*; Cutler, T.*; Grove, T.*; Hayes, D.*; Hutchinson, J.*; McKenzie, G.*; McSpaden, A.*; et al.

Nuclear Science and Engineering, 194(2), p.138 - 153, 2020/02

 Times Cited Count:7 Percentile:53.80(Nuclear Science & Technology)

To validate lead (Pb) nuclear cross sections, a series of integral experiments to measure lead void reactivity worth was conducted systematically in three fast spectra with different fuel compositions on the Comet critical assembly of the National Criticality Experiments Research Center. Previous experiments in a high-enriched uranium (HEU)/Pb and a low-enriched uranium (LEU)/Pb systems had been performed in 2016 and 2017, respectively. A follow-on experiment in a plutonium (Pu)/Pb system has been completed. The Pu/Pb system was constructed using lead plates and weapons grade plutonium plates that had been used in the Zero Power Physics Reactor (ZPPR) of Argonne National Laboratory until the 1990s. Furthermore, the HEU/Pb system was re-examined on the Comet critical assembly installed newly with a device that can guarantee the gap reproducibility with a higher accuracy and precision, and then the experimental data was re evaluated. Using the lead void reactivity worth measured in these three cores with different fuel compositions, the latest nuclear data libraries, JENDL 4.0 and ENDF/B VIII.0, were tested with the Monte Carlo calculation code MCNP version 6.1. As a result, the calculations by ENDF/B-VIII.0 were confirmed to agree with lead void reactivity worth measured in all the cores. It was furthermore found that the calculations by JENDL 4.0 overestimate by more than 20% for the Pu/Pb core while being in good agreements for the HEU/Pb and LEU/Pb cores.

Journal Articles

Prominence of pairing in inclusive ($$p,2p$$) and ($$p,pn$$) cross sections from neutron-rich nuclei

Paul, N.*; Obertelli, A.*; Bertulani, C. A.*; Corsi, A.*; Doornenbal, P.*; Rodriguez-Sanchez, J. L.*; Authelet, G.*; Orlandi, R.; 84 of others*

Physical Review Letters, 122(16), p.162503_1 - 162503_7, 2019/04

 Times Cited Count:9 Percentile:50.94(Physics, Multidisciplinary)

Journal Articles

Lead void reactivity worth in two critical assembly cores with differing uranium enrichments

Fukushima, Masahiro; Goda, J.*; Bounds, J.*; Cutler, T.*; Grove, T.*; Hutchinson, J.*; James, M.*; McKenzie, G.*; Sanchez, R.*; Oizumi, Akito; et al.

Nuclear Science and Engineering, 189, p.93 - 99, 2018/01

 Times Cited Count:9 Percentile:61.01(Nuclear Science & Technology)

To validate lead (Pb) nuclear cross sections, a series of integral experiments to measure lead void reactivity worths was conducted in a high-enriched uranium (HEU)/Pb system and a low enriched uranium (LEU)/Pb system using the Comet Critical Assembly at NCERC. The critical experiments were designed to provide complementary data sets having different sensitivities to scattering cross sections of lead. The larger amount of the $$^{238}$$U present in the LEU/Pb core increases the neutron importance above 1 MeV compared with the HEU/Pb core. Since removal of lead from the core shifts the neutron spectrum to the higher energy region, positive lead void reactivity worths were observed in the LEU/Pb core while negative values were observed in the HEU/Pb core. Experimental analyses for the lead void reactivity worths were performed with the Monte Carlo calculation code MCNP6.1 together with nuclear data libraries, JENDL 4.0 and ENDF/B VII.1. The calculation values were found to overestimate the experimental ones for the HEU/Pb core while being consistent for the LEU/Pb core.

Journal Articles

Probing the Coulomb interaction of PuCoGa$$_5$$ by phonon spectroscopy

Raymond, S.*; Piekarz, P.*; Sanchez, J. P.*; Serrano, J.*; Kirsch, M.*; Detlefs, B.*; Rebizant, J.*; Metoki, Naoto; Kaneko, Koji; Jochym, P. T.*; et al.

Journal of Alloys and Compounds, 444-445, p.104 - 108, 2007/10

 Times Cited Count:2 Percentile:20.98(Chemistry, Physical)

The phonon dispersion curves of the unconventional superconductor PuCoGa$$_5$$ were studied by inelastic X-ray scattering at room temperature. The experimental data agree well with ab initio lattice dynamics calculations. An accurate theoretical description of the phonon spectrum is obtained only when a local Coulomb repulsion $$U{approx}$$3 eV among 5f electrons is taken into account. This implies partial localization of the 5f electrons in this compound. A comparison made with the phonon spectrum of UCoGa$$_5$$ suggests that the latter compound is better described with a fully itinerant f electrons model.

Journal Articles

Progress in the ITER physics basis, 7; Diagnostics

Donn$'e$, A. J. H.*; Costley, A. E.*; Barnsley, R.*; Bindslev, H.*; Boivin, R.*; Conway, G.*; Fisher, R.*; Giannella, R.*; Hartfuss, H.*; von Hellermann, M. G.*; et al.

Nuclear Fusion, 47(6), p.S337 - S384, 2007/06

 Times Cited Count:343 Percentile:73.68(Physics, Fluids & Plasmas)

no abstracts in English

Journal Articles

Probing the coulomb interaction of the unconventional superconductor PuCoGa$$_5$$ by phonon spectroscopy

Raymond, S.*; Piekarz, P.*; Sanchez, J. P.*; Serrano, J.*; Kirsch, M.*; Janousova, B.*; Rebizant, J.*; Metoki, Naoto; Kaneko, Koji; Jochym, P. T.*; et al.

Physical Review Letters, 96(23), p.237003_1 - 237003_4, 2006/06

 Times Cited Count:26 Percentile:73.90(Physics, Multidisciplinary)

The phonon dispersion curves of the superconductor PuCoGa$$_{5}$$ were studied by inelastic X-ray scattering at room temperature. The experimental data agree well with ${it ab initio}$ lattice dynamics calculations. An accurate description of the phonon spectrum is obtained only when a local Coulomb repulsion U$${simeq}$$ 3 eV among 5$$f$$ electrons is taken into account.

Journal Articles

Phonons in UCoGa$$_{5}$$

Metoki, Naoto; Kaneko, Koji; Raymond, S.*; Sanchez, J. P.*; Piekarz, P.*; Parlinski, K.*; Ole$'s$, A. M.*; Ikeda, Shugo; Matsuda, Tatsuma; Haga, Yoshinori; et al.

Physica B; Condensed Matter, 378-380, p.1003 - 1004, 2006/05

 Times Cited Count:12 Percentile:48.49(Physics, Condensed Matter)

no abstracts in English

Oral presentation

Series experiments of lead void reactivity worth in two cores with different uranium enrichments

Fukushima, Masahiro; Goda, J.*; Bounds, J.*; Cutler, T.*; Grove, T.*; Hutchinson, J.*; James, M.*; McKenzie, G.*; Sanchez, R.*; Oizumi, Akito; et al.

no journal, , 

no abstracts in English

Oral presentation

Phonon in ATGa$$_{5}$$(A:U, Pu)

Metoki, Naoto; Kaneko, Koji; Ikeda, Shugo; Matsuda, Tatsuma; Haga, Yoshinori; Onuki, Yoshichika; Raymond, S.*; Piekarz, P.*; Sanchez, J. P.*; Serrano, J.*; et al.

no journal, , 

no abstracts in English

14 (Records 1-14 displayed on this page)
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