Results 21 to 30 of about 1,176 (121)

Multiplication and Presence of Shielding Material from Time-Correlated Pulse-Height Measurements of Subcritical Plutonium Assemblies [PDF]

, 2017
We present the results from the first measurements of the Time-Correlated Pulse-Height (TCPH) distributions from 4.5 kg sphere of α-phase weapons-grade plutonium metal in five configurations: bare, reflected by 1.27 cm and 2.54 cm of tungsten, and 2.54 ...
M. Monterial, P. Marleau, M. Paff, S. Clarke, S. Pozzi   +4 more
semanticscholar   +1 more source

Application of Neutron Multiplicity Counting Experiments to Optimal Cross-Section Adjustments

, 2020
This paper presents the first application of model calibration to neutron multiplicity counting (NMC) experiments for cross-section optimization that is informed by adjoint-based sensitivity analysis (SA) and first-order uncertainty quantification (UQ ...
A. Clark, J. Mattingly, J. Favorite
semanticscholar   +1 more source

Advances in Microscopic, Time-Correlated Neutron Noise Techniques [PDF]

, 2021
Estimating keff is of broad interest and paramount importance in the nuclear community including. A keff equal to one represents a self-sustaining and stable chain reaction and is often desirable in energy-producing reactors.
Hua, Michael
core   +1 more source

Validation of statistical uncertainties in subcritical benchmark measurements: Part II – Measured data

Annals of Nuclear Energy, 2019
Part I of this work presented an uncertainty approach which incorporates the singles and doubles counting rates determined by the Hage-Cifarelli formalism of the Feynman Variance-to-Mean method.
J. Hutchinson, R. Bahran, T. Cutler, M. Nelson, T. Grove, J. Arthur, G. McKenzie, Wilfried Monange, Eric Dumonteil   +8 more
semanticscholar   +1 more source

Validation of the two-region Rossi-alpha model for reflected assemblies

Nuclear Instruments and Methods in Physics Research Section A : Accelerators, Spectrometers, Detectors and Associated Equipment, 2020
Nuclear criticality safety, nonproliferation and safeguards, emergency response, and stockpile stewardship utilize estimates of the k eff multiplication factor.
M. Hua, F. Darby, J. Hutchinson, G. McKenzie, S. Clarke, S. Pozzi   +5 more
semanticscholar   +1 more source

Demonstrative Application to an OECD/NEA Reactor Physics Benchmark of the 2nd-BERRU-PM Method—I: Nominal Computations Consistent with Measurements

Energies, 2023
This work illustrates the applications of the 2nd-BERRU-PM methodology to polyethylene-reflected plutonium (PERP) OECD/NEA reactor physics benchmark. Using concepts from information theory and thermodynamics, the 2nd-BERRU-PM (2nd-order best-estimate ...
D. Cacuci, R. Fang
semanticscholar   +1 more source

Demonstrative Application to an OECD/NEA Reactor Physics Benchmark of the 2nd-BERRU-PM Method—II: Nominal Computations Apparently Inconsistent with Measurements

Energies, 2023
This work presents illustrative applications of the 2nd-BERRU-PM (second-order best-estimate results with reduced uncertainties predictive modeling) methodology to the leakage response of a polyethylene-reflected plutonium OECD/NEA reactor physics ...
R. Fang, D. Cacuci
semanticscholar   +1 more source

Machine Learning technique for isotopic determination of radioisotopes using HPGe $\mathrm{\gamma}$-ray spectra

, 2023
$\mathrm{\gamma}$-ray spectroscopy is a quantitative, non-destructive technique that may be utilized for the identification and quantitative isotopic estimation of radionuclides.
Khatiwada, Ajeeta, Klasky, Marc, Lombardi, Marcie, Matheny, Jason, Mohan, Arvind   +4 more
core   +1 more source

The use of small neutron detector arrays for the assessment of nuclear materials comprising 235-U, 238-U and 240-Pu [PDF]

, 2020
Neutron metrology has important applications in areas such as nuclear safeguards, quality assurance, and nuclear power operations. To date, the most common detectors for performing neutron metrology have been 3He detectors. With 3He production in decline,
O'Donnell, Helen
core   +1 more source

TAO Conceptual Design Report: A Precision Measurement of the Reactor Antineutrino Spectrum with Sub-percent Energy Resolution [PDF]

, 2020
The Taishan Antineutrino Observatory (TAO, also known as JUNO-TAO) is a satellite experiment of the Jiangmen Underground Neutrino Observatory (JUNO). A ton-level liquid scintillator detector will be placed at about 30 m from a core of the Taishan Nuclear
Abusleme, Angel, Adam, Thomas, Ahmad, Shakeel, Aiello, Sebastiano, Akram, Muhammad, Ali, Nawab, An, Fengpeng, An, Guangpeng, An, Qi, Andronico, Giuseppe, André, João Pedro Athayde Marcondes de, Anfimov, Nikolay, Antonelli, Vito, Antoshkina, Tatiana, Asavapibhop, Burin, Auguste, Didier, Babic, Andrej, Baldini, Wander, Barresi, Andrea, Baussan, Eric, Bellato, Marco, Bergnoli, Antonio, Bernieri, Enrico, Biare, David, Birkenfeld, Thilo, Blin, Sylvie, Blum, David, Blyth, Simon, Bolshakova, Anastasia, Bongrand, Mathieu, Bordereau, Clément, Breton, Dominique, Brigatti, Augusto, Brugnera, Riccardo, Budano, Antonio, Buscemi, Mario, Busto, Jose, Butorov, Ilya, Cabrera, Anatael, Cai, Hao, Cai, Xiao, Cai, Yanke, Cai, Zhiyan, Cammi, Antonio, Campeny, Agustin, Cao, Chuanya, Cao, Guofu, Cao, Jun, Caruso, Rossella, Cerna, Cédric, Chakaberia, Irakli, Chang, Jinfan, Chang, Yun, Chen, Pingping, Chen, Po-An, Chen, Shaomin, Chen, Shenjian, Chen, Xurong, Chen, Yi-Wen, Chen, Yixue, Chen, Yu, Chen, Zhang, Cheng, Jie, Cheng, Yaping, Chepurnov, Alexander, Chiesa, Davide, Chimenti, Pietro, Chukanov, Artem, Chuvashova, Anna, Claverie, Gérard, Clementi, Catia, Clerbaux, Barbara, Collaboration, JUNO, Corso, Flavio Dal, Corti, Daniele, Costa, Salvatore, Deng, Jiawei, Deng, Zhi, Deng, Ziyan, Depnering, Wilfried, Diaz, Marco, Ding, Xuefeng, Ding, Yayun, Dirgantara, Bayu, Dmitrievsky, Sergey, Dohnal, Tadeas, Donchenko, Georgy, Dong, Jianmeng, Dornic, Damien, Doroshkevich, Evgeny, Dracos, Marcos, Druillole, Frédéric, Du, Shuxian, Dusini, Stefano, Dvorak, Martin, Enqvist, Timo, Enzmann, Heike, Fabbri, Andrea, Lorenzo, Selma Conforti Di, Taille, Christophe De La   +99 more
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