A5045794115- Nuclear reactor physics and engineering
- Nuclear Physics and Applications
- Nuclear Materials and Properties
- Neutrino Physics Research
- Nuclear and radioactivity studies
- Particle physics theoretical and experimental studies
- Astrophysics and Cosmic Phenomena
- Graphite, nuclear technology, radiation studies
- Particle Detector Development and Performance
- Radioactive contamination and transfer
- Nuclear physics research studies
- Atomic and Subatomic Physics Research
- Radiation Detection and Scintillator Technologies
- Radioactivity and Radon Measurements
- Advanced NMR Techniques and Applications
- Dark Matter and Cosmic Phenomena
- Nuclear Engineering Thermal-Hydraulics
- Magnetic confinement fusion research
- Fiber-reinforced polymer composites
- Superconducting Materials and Applications
National Nuclear Laboratory
2015-2024
Sellafield (United Kingdom)
2015-2024
University of Tennessee at Knoxville
2024
University of Liverpool
2019
British Nuclear Fuel Limited (United Kingdom)
1992-2005
Dorset Green Technology Park
1991-1992
United Kingdom Atomic Energy Authority
1992
Research Detectors (United States)
1974
Intelligent Fusion Technology (United States)
1974
PRG S&Tech (South Korea)
1974
Abstract The joint evaluated fission and fusion nuclear data library 3.3 is described. New evaluations for neutron-induced interactions with the major actinides $$^{235}\hbox {U}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msup><mml:mrow /><mml:mn>235</mml:mn></mml:msup><mml:mtext>U</mml:mtext></mml:mrow></mml:math> , $$^{238}\hbox /><mml:mn>238</mml:mn></mml:msup><mml:mtext>U</mml:mtext></mml:mrow></mml:math> $$^{239}\hbox {Pu}$$...
We analyze within a nuclear database framework the shoulder observed in antineutrino spectra current reactor experiments. find that ENDF/B-VII.1 predicts arises from an analogous aggregate fission beta spectra. In contrast, JEFF-3.1.1 does not predict for two out of three modern neutrino experiments, and is predicted by $^{238}$U. consider several possible origins shoulder, explanations. For example, there could be problem with measured spectra, or harder neutron spectrum at light-water...
The study of fission yields has a major impact on the characterization and understanding process its applications. Fission yield evaluations represent synthesis experimental theoretical knowledge in order to perform best estimation independent yields. Today, lack correlations between different observables induces several inconsistencies evaluations. Different works proposed estimate satisfying consistency chain Nevertheless, none them introduces prior evaluation process. Covariance matrix...
The status of the Joint Evaluated Fission and Fusion file (JEFF) is described.JEFF-3.1 comprises a significant update actinide evaluations, materials evaluations that have emerged from various European nuclear data projects, activation library JEFF-3.1/A, decay fission yield sub-libraries, fusion-related files EFF project.The revisions were motivated by availability new measurements, modelling capabilities trends integral experiments.Validations been performed, mainly for criticality,...
The JEFF neutron induced and spontaneous fission product yield evaluation is currently unchanged from JEFF-3.1.1, also known by its UK designation UKFY3.6A. It based upon experimental data combined with empirically fitted mass, charge isomeric state models which are then adjusted within the model uncertainties to conform physical constraints of process. A new has been prepared for JEFF, called UKFY3.7, that incorporates replaces current empirical (multi-Gaussian fits mass distribution Wahl...
The standard method for calculating anti-neutrino emissions from a reactor involves knowing the fractional fission rates most important fissioning nuclides in reactor. To calculate these requires detailed physics calculations based upon design, fuel burnup dependent composition, location of specific assemblies core and operational data This has only been published few reactors during time periods, whereas to be practical use monitoring it is necessary able predict on publicly available...
Technology developed for the T2K electromagnetic calorimeter has been adapted to make a small footprint, reliable, segmented detector characterise anti-neutrinos emitted by nuclear reactors. The device and demonstrated University of Liverpool underwent field tests at Wylfa Magnox Reactor on Anglesey, UK. It was situated in 20\,ft ISO shipping container, above ground, roughly 60\,m from 1.5\,\GWt\ reactor core. Based design Near Detector ECal, detects through distinctive delayed coincidence...
The study of fission yields has a major impact on the characterization and understanding process its applications. products have direct influence amount neutron poisons that limit fuel burnup evaluation decay heat reactor after shutdown. Fission yield represents synthesis experimental theoretical knowledge in order to perform best estimation mass independent product yields. Today, lack correlations between different observables induces some inconsistencies evaluations. For instance,...
The effective Neodymium cumulative fission yields for 235U have been measured in the fast reactor PHENIX relatively to cross-section. data were derived from isotope-ratio measurements obtained frame of PROFIL-1, PROFIL-2A and PROFIL-2B programs. interpretations experimental programs performed with ERANOS code association Joint Evaluated Fission Fusion library JEFF-3.1.1. Final results 143Nd, 145Nd, 146Nd, 148Nd 150Nd 5.61%, 3.70%, 2.83%, 1.64% 0.66%, respectively. relative uncertainties...
In this paper, we present a detailed simulation of the antineutrino emissions from an advanced gas-cooled reactor (AGR) core, benchmarked with input data United Kingdom Hartlepool reactors. An accurate description evolution spectrum cores is needed to assess performance antineutrino-based monitoring concepts for nonproliferation, including estimations sensitivity rate and fuel content thermal power. The spectral variation present, while specific AGRs, are different studies published...
The anti-neutrino source properties of a fission reactor are governed by the production and beta decay radionuclides present summation their individual spectra. product radionuclide changes during operation different fissioning species give rise to distributions. It is thus possible determine some details operation, such as power, from emission confirm safeguards records. Also according published calculations, it may be feasible observe spectra depending on fissile contents fuel reactor's...